| Acantholimon hohenackeri | Iranian Prickly Thrift | RG |
| Acanthus hungaricus (balcanicus) | Bears Breech | SP |
| Acantholimon sp. | Prickly Thrift | RG |
| Acanthus spinosus | Bears Breech | SP |
| Achillea ageratifolia | Greek Yarrow | XGC |
| Achillea filipendulina 'Parker's Pride' | Parker's Variety Yarrow | XP |
| Achillea lewisii 'King Edward' | King Edward Yarrow | RG |
| Achillea millefolium 'Appelblossom' | Light Pink Yarrow | XP |
| Achillea millefolium 'Cassis' | Cassis Yarrow | XP |
| Achillea millefolium 'Gloria Jean'(rose) | Gloria Jean Yarrow | XP |
| Achillea millefolium 'Saucy Seduction' | Saucy Seduction Yarrow | XP |
| Achillea millefolium 'Strawberry Seduction' | Strawberry Seduction Yarrow | XP |
| Achillea millefolium 'Summer Berries' | Summer Berries Yarrow | XP |
| Achillea millefolium 'Terra Cotta' | Terra Cotta Yarrow | XP |
| Achillea millefolium 'White Beauty' | White Yarrow | XP |
| Achillea serbica | Serbian Yarrow | XGC |
| Achillea serbica var. camschatica 'Love Parade' | Serbian Yarrow | XP |
| Achillea ptarmica 'The Pearl' | Brideflower Yarrow | XP |
| Achillea X 'Anthea' | Anthea Hybrid Yarrow | XP |
| Achillea X kelleri | Kellers Yarrow | XP |
| Achillea X 'Moonshine' | Moonshine Sterile Hybrid Yarrow | XP |
| Achillea X 'Paprika' | Paprika' Yarrow | XP |
| Achillea X 'Walter Funke' | Walter Funke Yarrow | XP |
| Aconitum cammarum 'Bicolor' | Off white flowers w/ blue edges | SP |
| Aconitum carmichaelii (fisheri) | Monkshood | SP |
| Aconitum henryi 'Sparks Variety' | Monkshood Sparks Variety | SP |
| Aconitum napellus | Deep Blue Monkshood | SP |
| Aconitum 'Blue Lagoon' | Hybrid Monkshood | SP |
| Acorus calamus 'Variegatus' | Variegated Sweet Flag | SP |
| Acorus gramineus 'Mini-Gold' | Dwarf Gold Japanese Sweet Flag | BOG |
| Actea simplex 'Brunette' (Cimicifuga) | Brunette Snakeroot | SP |
| Actea simplex 'Hillside Black Beauty' (Cimicifuga) | Hillside Blk.Beauty Snakeroot | SP |
| Actea simplex 'Pink Spike' (Cimicifuga) | Pink Spike Snakeroot | SP |
| Actea simplex 'White Pearl' (Cimicifuga) | White Pearl Snakeroot | SP |
| Adiantum pedatum | Northern Maidenhair | FERN |
| Aegopodium podograria 'Variegatum' | Snow on the Mountain / Bishop's Weed | SGC |
| Aethionema grandiflorum | Fragrant Stonecress | RG |
| Aethionema membranaceum | Fragrant Stonecress | RG |
| Aethionema schistosum | Fragrant Stonecress | RG |
| Agapanthus X Headbourne Hybrids | Hardy Lily of the Nile | GP |
| Agapanthus X 'Back in Black' | Blue Lily of the Nile, Black Stems | GP |
| Agapanthus X 'Bressingham Blue' | Blue Hybrid Lily of the Nile | GP |
| Agapanthus X 'Hardy White' HCG intro | Hardy White lily of the Nile | GP |
| Agastache aurantiaca 'Coronado Gold' P.S. | Orange Hyssop | XP |
| Agastache aurantiaca 'Coronado Red' P.S. | Red Hyssop | XP |
| Agastache aurantiaca 'Shades of Orange' HCG | Shades of Orange Hyssop | XP |
| Agastache barberi | Giant Pink/Purple Hyssop | XP |
| Agastache barberi 'Tutti Frutti' | Tutti Fruitti Hyssop | XP |
| Agastache cana | Double Bubble Hyssop | XP |
| Agastache cana 'Heather Queen' | Heather Queen Hyssop | XP |
| Agastache cana 'Rosita' HCG intro | Semi-dwarf Hyssop | XP |
| Agastache foeniculum 'Blue Fortune' | Blue Fortune' Hyssop | XP |
| Agastache foeniculum 'Golden Jubilee' | Gold Leaf/ Purple Flowers Hyssop | XP |
| Agastache neomexicana HCG | Dwarf Pink Hyssop | XP |
| Agastache rupestris 'Sinning' P.S. | Sonoran Sunset Hyssop | XP |
| Agastache X (cana x rupestris) | Hybrid Hyssop Pink/Orange | XP |
| Agastache X (rupestris) 'Orange Flare' HCG intro | Red/Orange Hyssop | XP |
| Agastache X 'Big Bazooka' TG intro | Big Bazooka Hyssop | XP |
| Agastache X 'Blue Blazes' TG intro | Blue Blazes Hyssop | XP |
| Agastache X 'Desert Sunrise' HCG intro | Desert Sunrise Hyssop | XP |
| Agastache X 'Acapulco Rose' | Rose Hyssop | XP |
| Agastache X 'Ava' (cana & barberi) HCG intro | HCG PurpleHybrid Hyssop | XP |
| Agastache X 'Black Adder' HCG intro | HCG Dark PurpleHybrid Hyssop | XP |
| Agastache X 'Firebird' | Firebird' Hybrid Hyssop | XP |
| Agave havardiana | Havard's Century Plant | XP/RG |
| Agave parryi | Parry's Century Plant | XP/RG |
| Agave parryi v. neomexicana | Century Plant | XP/RG |
| Agave utahensis v. kaibabensis | Utah Century Plant (Smallest) | XP/RG |
| Ajuga reptans 'Arboretum Giant' | Arboretum Giant Bugleweed | SGC |
| Ajuga reptans 'Black Scallop' | Black Scallop Bugleweed | SGC |
| Ajuga reptans 'Bronze Beauty' | Bronze Beauty Bugleweed | SGC |
| Ajuga reptans 'Burgundy Glow' | Burgundy Glow Bugleweed | SGC |
| Ajuga reptans 'Catlin's Giant' | Catlin's Giant Bugleweed | SGC |
| Ajuga reptans 'Chocolate Chip' | Chocolate Chip Bugleweed | SGC |
| Akebia quinata | Chocolate Vine; 5-Leaf Akebia | VINE |
| Alcea rosea 'Amelia' | Dark Red Hollyhock | XP |
| Alcea rosea 'Chater's Magnificent Mix' | Mixed Double Hollyhock | XP |
| Alcea rosea 'Chater's Scarlet' | Scarlet Dbl. Hollyhock | XP |
| Alcea rosea 'Fruity Mix' | Mixed Colors | XP |
| Alcea rosea 'Indian Spring' | Mixed Single Hollyhock | XP |
| Alcea rosea 'Peaches and Dreams' | Double Peach Hollyhock | XP |
| Alcea rosea 'Powder Puff' | Double Peach Hollyhock | XP |
| Alcea rosea 'Single Red' | Single Red Hollyhock | XP |
| Alcea rosea 'Summer Carnival Mix' | Double. Red/White/Yellow/Pi/Pu | XP |
| Alcea rosea 'The Watchman' | Black Hollyhock | XP |
| Alcea rugosa | Russian Yellow Hollyhock | XP |
| Alcea X Crème de Cassis' | White w/ Red Eye Hollyhock | XP |
| Alcea x 'Georgia O'Keefe' | Peach Hollyhock | XP |
| Alchemilla erythropoda | Caacasus Lady's Mantle | SP |
| Alchemilla mollis 'Select' | Select Lady's Mantle | SP |
| Allium caeruleum | Ornamental Onion | XP |
| Allium 'Mongolian Gem' | Mongolian Gem Ornamental Onion | XP |
| Allium senescens 'Blue Twister' (HCG) | Twisted Leaf Onion | XP |
| Allium senescens 'Glaucum' | Circle Onion | XP |
| Aloinopsis spathulata | Z5 Pink | RG |
| Aloinopsis X (species mixed) | Range of Colors and Hardiness | RG |
| Alstroemeria X 'Sweet Laura' | Peruvian Lily | TP |
| Alyssoides utriculata | Bladderpod | XP |
| Alyssum markgraffii | Globe Alyssum | XRG |
| Alyssum montanum | Basket of Gold | XRG |
| Alyssum wulfenianum | Gold Cushion | XRG |
| Amorpha canescens | Lead Plant | XS |
| Amorpha nana | Dwarf Lead Plant | XS |
| Amsonia hubrechtii | Blue Star | GP |
| Amsonia jonesii | Jones Amsonia | XP |
| Amsonia tabernaemontana | Tabernaemontana Blue Star | GP |
| Amsonia X 'Blue Ice' | Shorter, Longer Flowering | GP |
| Anacyclus (pyrethrum )depressus var. 'Garden Gnome' | Garden Gnome/ Atlas Daisy | XGC |
| Anaphalis margaritacea | Pearly Everlasting | XP |
| Anchusa azurea 'Loddon Royalist' | Loddon Royalist Cape Bugloss | XP |
| Anchusa capensis | Cape Bugloss | XB |
| Anchusa italica | Italian Bugloss | XP |
| Androsace sarmentosa 'Chumbyi' | Silky Rock Jasmine | RG |
| Androsace sarmentosa 'Sheriffii' | Silky Rock Jasmine | RG |
| Androsace septentrionalis 'Stardust' | Stardust Rock Jasmine | RG |
| Anemone hupehensis 'Prince Henry' | Prince Henry' Japanese Anemone | SP |
| Anemopsis claifornica 'Yerba de Mansa' | Lizard Tail | BOG |
| Anemone hupehensis 'September Charm' | Single Purple Rose Japanese Anemone | SP |
| Anemone multifida 'Rubra' | Red Anemone | SP |
| Anemone sylvestris 'Madonna' | Snowdrop Anemone | GP |
| Anemone X 'Honorine Jobert' | Large Single White Japanese Anemone | SP |
| Anemone X 'Lady Glimour' | Pink Lady Glimour Anemone | SP |
| Anemone X 'Pamina' | Double Dark Pink Hybrid Anemone | SP |
| Anemone X 'Party Dress' | Huge Double Pink Hybrid Anemone | SP |
| Anemone X 'Queen Charlotte' | Pale Pink Hybrid | SP |
| Anemone X 'Whirlwind' | Double White Japanese Anemone | SP |
| Angelica atropurpurea | Purple-Stem Angelica | GP |
| Angelica gigas | Koeran Angelica | GP |
| Angelica pachycarpa | Glossy New Zealand Angelica | GP |
| Antennaria dioica 'Rubra' | Pink Pussytoes | XGC |
| Antennaria sp. 'McClintock's Variety' (Choice) | Flowerless Pussytoes | XGC |
| Antennaria sp. 'Silver Carpet' | Flowerless Pussytoes | XGC |
| Anthemis marschalliana (biebersteiniana) | Dwarf Silver Marguerite | RG |
| Anthemis tinctoria 'Charm' | Charm Anthemis | XP |
| Anthemis tinctoria 'Susanna Mitchell' | Susanna Mitchell Anthemis | XP |
| Antirrhinum braun-blanquettii 'Gem of Avilla' TG intro | Raspberry Hardy Snapdragon | GP |
| Antirrhinum braun-blanquettii 'Cervantes' TG intro | Yellow Hardy Snapdragon | GP |
| Antirrhinum braun-blan. 'Dulcinea's Heart' TG intro | Peach/Yellow Hardy Snapdragon | GP |
| Antirrhinum braun-blan.'La ManchaDancer' TG intro | Lavender/Gold Hardy Snapdragon | GP |
| Antirrhinum braun-blan.'Moorish Enchanter' TG intro | Mauve/Pink Hardy Snapdragon | GP |
| Antirrhinum braun-blan.'Saffron Prince' TG intro | Bright Orange Hardy Snapdragon | GP |
| Antirrhinum braun-blan.'Swirling Skirts' TG intro | Deep Red Hardy Snapdragon | GP |
| Antirrhinum braun-blan.'Rosinante' TG intro | Soft Pink Hardy Snapdragon | GP |
| Antirrhinum hispanicum roseum | Spanish Snapdragon | RG |
| Anthriscus sylvestris 'Ravenswing' | Purple Cowparsley | GP |
| Aquilegia alpina | Alpine Columbine | RG |
| Aquilegia caerulea | Rocky Mountain Columbine | GP |
| Aquilegia caerulea 'Red Hobbit' | Dwarf Red Columbine | RG |
| Aquilegia canadensis | Eastern Red Columbine | GP |
| Aquilegia chrysantha v. chaplinei 'Little Treasure' | Dwf. Golden Columbine | GP |
| Aquilegia chrysantha 'Denver Gold' (P.S.) | Golden Spur Columbine | GP |
| Aquilegia chrysantha 'Swallowtail' | Swallowtail Columbine | GP |
| Aquilegia chrysantha v. chaplinei 'Little Treasure' | Dwarf Columbine (HCG) | RG |
| Aquilegia elegantula | Dwarf Western Red Columbine | RG |
| Aquilegia glandulosa | Altai Columbine, Siberian Columbine | GP |
| Aquilegia flabellata 'Blackcurrant Ice' | Blackcurrant Ice Columbine | RG |
| Aquilegia formosa | Western / Red Spur Columbine | GP |
| Aquilegia rockii | limited | RG |
| Aquilegia saximontana | Miniature Blue CO Columbine | RG |
| Aquilegia sp. (collected in Alaska) | Alaskan Collected Columbine | GP |
| Aquilegia vulgaris 'Black Barlow' | Double Black Columbine | GP |
| Aquilegia vulgaris 'Christa Barlow' | Blue-Purple Barlow Columbine | GP |
| Aquilegia vulgaris 'Nora Barlow' | Double Red/pink/white Columbine | GP |
| Aquilegia vulgaris 'Peaches and Cream' | Peaches & Cream Columbine | GP |
| Aquilegia vulgaris 'Ruby Port' | Dark Red Ruby Port Columbine | GP |
| Aquilegia vulgaris 'Winky Blue and White' | Double Blue and White Columbine | GP |
| Aquilegia vulgaris 'White Barlow' | Double White Barlow Columbine | GP |
| Aquilegia vulgaris 'Leprechaun Gold' | Gold/Green Columbine | GP |
| Aquilegia X 'Swan Burgundy and White' | Burgundy and White Columbine | GP |
| Aquilegia X 'Swan Lavender' | Lavender Columbine | GP |
| Aquilegia X 'Swan Rose and White' | Rose and White Columbine | GP |
| Aquilegia X 'Swan Violet and White' P.S. | Remembrance Columbine | GP |
| Aquilegia X 'Crimson Star' | Crimson Star Columbine | GP |
| Aquilegia X 'Music Blue & White' | Music Blue & White' Columbine | GP |
| Aquilegia X 'Blue Bird' (Songbird Series) | Blue Bird Columbine | GP |
| Aquilegia X 'Blue Jay' (Songbird Series) | Blue Jay Columbine | GP |
| Arabis caucasica 'Snow Ball' | Snow Ball Rockcress | XGC/RG |
| Arabis caucasica 'Compinkie' | Compinkie Wall Rockcress | XGC/RG |
| Arabis ferdinandi-coburgii 'Old Gold' | Golden Variegated Rockcress | RG |
| Arabis ferdinandi-coburgii 'Variegata' | White Variegated Rockcress | RG |
| Arctostaphylos uva-ursi | Kiinnickinnick | XGC |
| Arctostaphylos 'Panchito' P.S. | Panchito Manzanita | XGC |
| Arctostaphylos 'Cascade' | Cascade Manzanita | XGC |
| Arctotis adpressus | Alpine African Daisy | RG |
| Arenaria alfacarensis | Spanish Sandwort | RG |
| Arenaria montana 'Avalanche' | Mountain Sandwort | RG |
| Argemone polyanthemos | Prickley Poppy | XP |
| Armeria maritima 'Splendens' ('Laucheana') | Splendens' Sea Pink / Thrift | RG |
| Armeria allciae v. 'Leucantha' | Red Leaf Sea Pink /Thrift | RG |
| Armeria maritima v. rubrifolia | Green Leaf/WhiteThrift | RG |
| Armeria maritima v. rubrifolia | Deep Pink Thrift | RG |
| Armeria maritima v. rubrifolia | Showy Thrift | RG |
| Armeria splendens | Common Sea Trift | RG |
| Artemesia assoana | Spanish Sage | XP |
| Artemisia frigida | Native Creeping / Fringed Sage | XGC |
| Artemisia lactiflora 'Ghizhou' | Ghizhou Artemisia | GP |
| Artemisia lactiflora 'Oriental Limelight' | Oriental Limelight Artemisia | GP |
| Artemisia ludoviciana 'Silver Frost' | Silver Frost Artemisia | XP |
| Artemisia ludoviciana 'Valerie Finnis' | Valerie Finnis Sage | XP |
| Artemisia pycnocephala 'David's Choice' | David's Choice Sage | XP |
| Artemisia schmidtiana 'Nana' | Silver Mound Sage | XP |
| Artemisia stelleriana 'Silver Brocade' | Silver Brocade Dusty Miller | XP |
| Artemisia versicolor 'Sea Foam' P.S. | Seafoam Artemisia | XP |
| Artemisia vulgaris 'Golden Phoenix' | Golden Phoenix Artemisia | XP |
| Artemisia X 'Beth Chatto' | Beth Chatto Artemisia | XP |
| Artemisia X 'Huntington Gardens' | Huntington Gardens Artemisia | XP |
| Artemisia X 'Powis Castle' | Powis Castle Sage | XP |
| Aruncus dioicus | Cream Goatsbeard | SP |
| Aruncus dioicus 'Child of Two Worlds' | Hybrid Goatsbeard | SP |
| Aruncus dioicus 'Whirlwind' | Whirlwind White Goatsbeard | SP |
| Asarum canadense | Wild Ginger | SGC |
| Asarum europeanum | European Ginger | SP |
| Asclepias incarnata 'Ice Ballet' | Fragrant White Butterfly Weed | GP |
| Asclepias incarnata 'Soulmate' | Fragrant Lt Pink/White Milkweed | GP |
| Asclepias tuberosa | Orange Butterfly Weed | XP |
| Asclepias tuberosa 'Gay Butterflies' | Gay Butterflies Butterfly Weed | XP |
| Asclepias tuberosa 'Hello Yellow' | Yellow Butterfly Weed | XP |
| Aster alpinus 'Dark Beauty' | Deep Purple Rock Garden Aster | RG |
| Aster alpinus 'Goliath' | Goliath Rock Garden Aster | RG |
| Aster alpinus 'Pinkie' | Pinkie Rock Garden Aster | RG |
| Aster dumosus 'Professor Kippenberg' | Prof.Kippenberg' Aster | GP |
| Aster dumosus Woods Pink' | Wood's Pink' Aster | GP |
| Aster dumosus 'Woods Purple' | Woods Purple Aster | GP |
| Aster fendleri 'My Antonia' | My Antonia Aster | GP |
| Aster frikartii 'Flora's Delight' | Flora's Delight Aster | GP |
| Aster frikartii 'Monch' | Monch Light Blue Aster | GP |
| Aster lateriflorus 'Lady in Black' | Lady in Black Aster | GP |
| Aster novae-angliae 'Alma Potschke' | Alma Potschke New England Aster | GP |
| Aster novae-angliae 'Purple Dome' | Purple Dome New England Aster | GP |
| Aster novi-belgii 'Alert' | Alert Aster | GP |
| Aster oblongifolius 'Dream of Beauty' | Dream of Beauty Aster | XP |
| Aster praealtis | Willow Aster | GP |
| Aster sedifolius 'nanus' | Rhone Aster | GP |
| Astilbe chinensis 'Pumila' | Pumila Dwarf Astilbe | SP |
| Astilbe X 'Visions' | Visions Astilbe | SP |
| Astilbe X 'Visions in Pink' | Visions Astilbe | SP |
| Astilbe X 'Visions in White' | Visions Astilbe | SP |
| Astrantia major 'Ruby Cloud' | Dark Maroon Masterwort | SP |
| Astrantia major 'Rubra' | Dark Maroon Masterwort | SP |
| Astrantia major 'Rubra' | Dark Maroon Masterwort | SP |
| Astrantia major 'Ruby Stars' | Deep Red Masterwort | SP |
| Athyrium nipponicum 'Ghost' | Ghost Japanese Painted Fern | FERN |
| Athyrium nipponicum 'Lady in Red' | Lady in Red Fern | FERN |
| Athyrium nipponicum 'Pictum' | Japanese Painted Fern | FERN |
| Athyrium nipponicum 'Regal Red' | Regal Red Fern | FERN |
| Athyrium nipponicum X felix-femina 'Branford Beauty' | Branford Beauty Fern | FERN |
| Atriplex canescens | Four Wing Saltbush | X/SHURB |
| Aubrieta 'Argenteovariegata' | Variegated Rockcress | GC |
| Aubrieta 'Blue Cascade' | Blue Cascade Rockress | GC |
| Aubrieta 'Purple Cascade' | Purple Cascade Rockcress | GC |
| Aubrieta 'Red Cascade' | Red Rockcress | GC |
| Aubrieta x cult. grandiflora | Large Flowered Mix Rockcress | GC |
| Aubrieta X (cultorum) 'Whitewell Gem' | Deep Purple | GC |
| Aurinia saxatilis 'Gold Dust' | Gold Dust Basket of Gold | XGC |
| Aurinia saxatilis 'Sulphurea' | Sulfur Basket of Gold | XGC |
| Azorella trifurcata (Bolax glebaria) 'Nana' | Bolax / Plastic Plant | RG |
| Ballota pseudodictamnus | Ornamental Horehound | XP |
| Ballota pseudodictamnus 'Nana' | Ornamental Horehound | XP |
| Baptisia australis | False Indigo | GP |
| Baptisia australis v. minor | Small False Indigo | GP |
| Baptisia leucophaea | Cream False Indigo | GP |
| Baptisia X 'Carolina Moonlight' | Yellow False Indigo | GP |
| Baptisia X 'Solar Flare Prairieblues' | Solar Flare False Indigo | GP |
| Baptisia X 'Twilight Prairie Blues' | Twlight Prairie Blues False Indigo | GP |
| Belamcanda flava 'Hello Yellow' | Yellow Blackberry Lily | GP |
| Bellis perennis 'Pomponette' | Pomponette English Daisy | SGC |
| Bellis perennis 'Pomponette' | Pomponette' English Daisy | SGC |
| Bellis perennis 'Rominette' | Rominette English Daisy | SGC |
| Bellis perennis 'Tasso Mix' | Tasso Mix English Daisy | SGC |
| Bergenia 'Baby Doll' | Heartleaf Bergenia | SP |
| Bergenia 'Bressingham Ruby' | Heartleaf Bergenia | SP |
| Bergenia cordifolia | Heartleaf Bergenia | SP |
| Bergenia cordifolia 'Winter-Glow' | Winter Glow Bergenia | SP |
| Bergenia sp. 'Baby Doll' | Baby Doll Bergenia | SGC |
| Berkheya purpurea | Purple Berkheya | XP |
| Berlandiera lyrata (P.S.) | Chocolate Flower | XP |
| Boltonia asteroides 'Jim Crockett' | Jim Crockett Boltonia | GP |
| Boltonia asteroides 'Snowbank' | Snowbank' Boltonia | GP |
| Brunnera macrophylla | Siberian Bugloss/False Forget-Me-Not | SP |
| Brunnera macrophylla 'Jack Frost' | Siberian Forget-me-not | SP |
| Brunnera macrophylla 'Looking Glass' | More white/silver in variegation | SP |
| Bukiniczia cabulica | Biennial | RG |
| Buxus microphylla 'Julia Jane' | Julia Jane Boxwood | SHRUB |
| Cacti (assorted Hardy varieties) | Cacti (assorted varieties) | XP |
| Calamintha nepeta 'White Cloud' | White Cloud Calamint | XP |
| Callirhoe alcaeoides 'Logan Calhoun' | White Prairie Winecup | XP |
| Callirhoe involucrata | Wine Cups / Poppy Mallow | XGC |
| Caltha palustris | Marsh Marigold | BOG |
| Calylophus lavandulifolia | Bush Sundrops | XP |
| Calylophus serrulatus 'Prairie Lode' | Shrubby Evening Primrose | XP |
| Campanula carpatica 'Blue Clips' | Blue Clips Carpathian Harebell | RG |
| Campanula carpatica 'White Clips' | White Clips Carpathian Harebell | RG |
| Campanula cochleariifolia 'Bavarian Blue' | Bavaria Blue Fairy Thimbles | RG |
| Campanula cochleariifolia 'Bavarian White' | Bavaria White Fairy Thimbles | RG |
| Campanula garganica 'Dickson's Gold' | Dickson's Gold Carpathian Harebell | RG |
| Campanula glomerata 'Superba' | Superba Harebells | GP |
| Campanula latifolia 'Lodden Anna' | Lodden Anna Harebells | GP |
| Campanula persicifolia grandiflora | Blue Peachbells | GP |
| Campanula persicifolia 'Alba' | White Peachbells | GP |
| Campanula persicifolia 'Chettle Charm' | Peachleaf Harebell | GP |
| Campanula poscharskyana 'Blue Waterfall' | Blue Waterfall Harebell | RG |
| Campanula punctata f.rubriflora 'Cherry Bells' | Cherry Bells Campanula | SP |
| Campanula pyramidalis 'Mix' | Chimmney Campanula | SP |
| Campanula rotundifolia | Scotch Bluebell / Harebell | RG |
| Campanula trachelium 'Bernice' | Bernice Harebell | RG |
| Campanula X 'Birch Hybrid' | Dwarf w/pale blue flowers | RG |
| Campsis radicans 'Minnesota Red' | Red Trumpet Vine | VINE |
| Campsis radicans 'Flava' | Yellow Trumpet Vine | VINE |
| Campsis x tagliabuana 'Madame Galen' | Lrg. Orange Trumpet Vine | VINE |
| Caryopteris Dark Knight' | Dark Knight Blue Spirea | XS |
| Caryopteris 'Worcester Gold' | Blue Spirea | XS |
| Caryopteris 'Pershore Select' | Purple Flowers/Silvery Foliage | XS |
| Caryopteris X clandonensis 'First Choice' | First Choice Spirea | XS |
| Castilleja integra | Indian Paint Brush | XP/RG |
| Castilleja sessiliflora | Plains Paintbrush | XP/RG |
| Catananche bicolor | White Cupid's Dart | XP |
| Catananche caerulea 'Amore' | Blue Cupid's Dart | XP |
| Centaurea macrocephala | Globe Cornflower | GP |
| Centaurea montana | Mountain Bluet | GP |
| Centaurea montana 'Gold Boulion' | Gold Leaf Mountain Bluet | GP |
| Centranthus ruber 'Alba' | White Jupiter's Beard | XP |
| Centranthus ruber 'Coccineus' | Red Jupiter's Beard | XP |
| Centranthus ruber 'Pretty Betsy' | Pink Jupiter's Beard | XP |
| Centranthus ruber 'Rosy Pink' | Rosy Pink Jupiter's Beard | XP |
| Cephalaria alpina | Yellow Scabiose | XP |
| Cerastium alpinum ssp. lanatum | Alpine Mousears | RG |
| Cerastium candidissimum | Large-leaf Mouseears | RG |
| Cerastium tomentosum 'Silver Carpet' | Silver Carpet Dwarf Pussytoes | XGC |
| Ceratostigma plumbaginoides | Leadwort (Plumbago) | SGC |
| Chaenorhinum origanifolium 'Blue Dream' | Blue Dream Dwarf Snapdragon | RG |
| Cheilanthes argentea 'Silver Cloak Fern' | Silver Clloak Fern | FERN |
| Chelone lyonii 'Hot Lips' | Pink Turtlehead | GP |
| Chelone obliqua | White Turtlehead | GP |
| Chilopsis/Catalpa Hyb. 'Chitalpa' | Chitalpa | SHRUB |
| Chilopsis linearis 'Red' | Red Desert Willow | SHRUB |
| Chilopsis linearis stellata | Desert Willow | SHRUB |
| Clematis fremontii' | Fremont's Clematis | VINE |
| Clematis fruticosa 'Mongolian Gold' | Mongolian Gold Clematis | VINE |
| Clematis integrifolia P.S. | Mongolian Bells Clematis | VINE |
| Clematis heracleifolia | Heracle's Bush Clematis | GP |
| Clematis hexapetala 'Mongolian Snowflakes' | Mongolian SnowflakesClematis | VINE |
| Clematis hirsutissima 'Hairy' | HairyClematis | VINE |
| Clematis terniflora 'Sweet Autumn' | Swt. Autumn Clematis | VINE |
| Convallaria majalis | Lily of the Valley | SGC |
| Coreopsis auriculata 'Nana' | Dwarf Coreopsis | GP |
| Coreopsis auriculata 'Zampfir' | Fluted Tickseed | XP |
| Coreopsis grandiflora 'Early Sunrise' | Early Sunrise Coreopsis | GP |
| Coreopsis grandiflora 'Flying Saucers' | Flying Saucer Coreopsis | XP |
| Coreopsis grandiflora 'Presto' | Presto Coreopsis | GP |
| Coreopsis grandiflora 'Sunfire' | Sunfire Coreopsis | GP |
| Coreopsis rosea | Pink Coreopsis | GP |
| Coreopsis verticillata 'Golden Gain' | Golden Gain Coreopsis | GP |
| Coreopsis verticillata 'Moonbeam' | Moonbeam Threadleaf Coreopsis | GP |
| Coreopsis verticillata 'Sweet Dreams' | Sweet Dreams Coreopsis | GP |
| Coreopsis verticillata 'Zagreb' | Zagreb Threadleaf Coreopsis | GP |
| Coreopsis X 'Caliente' | Caliente Hybrid Coreopsis | GP |
| Coreopsis X 'Crème Brulee' | Crème Brulee Hybrid Coreopsis | GP |
| Coreopsis X 'Full Moon' | Full Moon Coreopsis (lt. yellow/ 3"flwrs) | XP/GP |
| Coreopsis X 'Heaven's Gate' | Pink Heaven's Gate Coreopsis | GP |
| Coreopsis X 'Route 66' | Route 66 Coreopsis | GP |
| Coreopsis X 'Sienna Sunset' | Sienna Sunset Coreopsis | GP |
| Corydalis lutea | Native Corydalis | GP |
| Corydalis x 'Blue Heron' | Blue Heron Corydalis | GP |
| Cotula hispida | Brass Buttons | XGC |
| Cotula sp. 'Tiffendell Gold' | Creeping Gold Buttons | XGC |
| Cotyledon orbiculata | Hardy Succulent | RG |
| Crambe cordifolia | Giant Flowering Kale | XP |
| Crambe maritima | Sea Kale | XP |
| Crinum bulbispermum | South African River Lily | BOG |
| Crocosmia X 'Emberglow' | Emberglow Crocosima | GP |
| Crocosmia X 'George Davidson' | George Davidson Crocosima | GP |
| Crocosmia X 'Lucifer' | Striking Red Montbretia/Crocosmia | GP |
| Crocosmia X 'Walburton Yellow' | Walburton Yellow Montbretia | GP |
| Cyclamen hederifolium | Hardy Cyclamen | SP |
| Cyclamen purpurascens | Hardy Cyclamen | SP |
| Cytissus purgens P.S. | Spanish Broom | SHRUB |
| Cytissus scoparius 'Minstead' (lav/rose) | Minstead Broom | SHRUB |
| Cytissus scoparius 'Moonlight' | Moonlight Broom | SHRUB |
| Cytissus scoparius x dallimorei 'Lena' (red) | Lena Broom | T/SHRUB |
| Dalea purpurea | Prairie Clover | XP |
| Dalea purpurea 'Stephanie' | Stephanie Prairie Clover | XP |
| Daphne X 'Lawrence Crocker' | Lawrence Crocker Daphne | SHRUB |
| Delosperma aberdeenense 'Abbey Rose' | Abbey Rose Iceplant | XGC |
| Delosperma aberdeenense 'Oberg' | Tiny White Iceplant | XGC |
| Delosperma basuticum 'Gold Nugget' | Gold Nugget Iceplant | XGC |
| Delosperma basuticum 'White Nugget' | White Nugget Iceplant | XGC |
| Delosperma cooperi | Purple Iceplant | XGC |
| Delosperma cooperi 'Select Red' | Select Red Iceplant | XGC |
| Delosperma dyeri 'Psdold' P.S. | Red Mountain Iceplant | XGC |
| Delosperma floribundum 'Starburst' P.S. | 'Starbust' Iceplant | XGC |
| Delosperma nubigenum | Hardy Yellow Iceplant | XGC |
| Delosperma nubigenum 'Large Leaf Form' | Large Leaf Yellow Iceplant | XGC |
| Delosperma nubigenum 'Miniature Form' | Dwarf Yellow Iceplant | XGC |
| Delosperma sp. 'Blut' TG intro | Dark Purple Iceplant | XGC |
| Delosperma sp. (ex Beaufort West) | Beaufort West Iceplant | XGC |
| Delosperma sp. 'Hogan' | Sean Hogan Collection | RG |
| Delosperma sp. 'Lavender Ice' P.S. | Lavender Ice' Iceplant | XGC |
| Delosperma sp. 'Lesotho Magenta' HCG | Magenta Hardy Iceplant | XGC |
| Delosperma sp. 'Ruby Stars' | Ruby Stars Iceplant | XGC |
| Delosperma sp. 'Tiffindell' HCG | Pink Iceplant | XGC |
| Delosperma sphalmanthoides | TinyPink Iceplant | XGC |
| Delosperma sutherlandii 'Peach Star' | Z6 Peach w/ yellow eye | RG |
| Delosperma 'Kelaidis' P.S. | 'Mesa Verde' Iceplant | XGC |
| Delosperma x 'John Proffitt' P.S. | 'Table Mountain' Iceplant | XGC |
| Delphinium belladonna | Blue Delphinium | GP |
| Delphinium belladonna 'Bellamosa' | Bellamosa Delphinium | GP |
| Delphinium elatum 'Blushing Brides' | Mulberry Pink | GP |
| Delphinium elatum 'Pagan Purples' | New Millenium Delphnium | GP |
| Delphinium elatum 'Pink Punch' | Pink Punch Delphinium | GP |
| Delphinium elatum 'Purple Passion' | Purple Passion Delphinium | GP |
| Delphinium nudicale 'Laurin' | Laurin Miniature Red Delphinium | GP |
| Delphinium X 'Astolat' | Astolat P.G. Delphinium | GP |
| Delphinium X 'Black Knight' | P.G. Black Knight Delphinium | GP |
| Delphinium X 'Blue Bird' | P.G. Blue Bird Delphinium | GP |
| Delphinium X 'Blue Lace' | New Millenium Delphnium | GP |
| Delphinium X 'Dark Blue w/Dark Bee' | Pacific Giants Delphinium | GP |
| Delphinium X 'Dbl. Innocence' | New Millenium Delphnium | GP |
| Delphinium X 'Galahad' | P.G. Galahad Delphinium | GP |
| Delphinium X 'Laurin' | Pink P.G. Delphinium | GP |
| Delphinium X 'King Arthur' | P.G. King Arthur Delphinium | GP |
| Delphinium X 'Sky Blue w/White Bee' | Pacific Giants Delphinium | GP |
| Delphinium X 'Summer Skies' | Pacific Giants Delphinium | GP |
| Dendranthema grandiflorum 'Hillside Pink Sheffield' | Hillside Pink Sheffield' Mum | GP |
| Dendranthema weyrichii 'White Bomb' | White Hardy Mum | GP |
| Dendranthema X 'Butter Pat' | Yellow Hardy Mum | GP |
| Dendranthema X 'Clara Curtis' | Hardy Mum | GP |
| Dendranthema X 'Emporer of China' | Hardy Mum | GP |
| Dendranthema X 'Mary Stroker' | Hardy Mum | GP |
| Dendranthema X 'Rhumba' | Hardy Mum | GP |
| Dendranthema X 'Samba' | Hardy Mum | GP |
| Desmanthus illinoensis | Illinois Bundleflower | XP |
| Dianthus alpinus | Alpine Red Dianthus | RG |
| Dianthus amurensis 'Siberian Blues' | Siberian Blues Dianthus | RG |
| Dianthus barbatus 'Flore Pleno' | Flore Pleno Sweet William | GP |
| Dianthus barbatus 'Indian Carpet' | Indian Carpet Sweet William | GP |
| Dianthus barbatus 'Heart Attack' | Heart Attack Sweet William | GP |
| Dianthus caryophyllus 'Blushing Maiden' | Blush Pink Carnation | GP |
| Dianthus deltoides 'Nelli' | Nelli Red Pinks | RG |
| Dianthus giganteus | Deep Pink Dianthus | GP |
| Dianthus gratianopolitanis 'Fire Witch' | Fire Witch Cheddar Pink | RG |
| Dianthus gratianopolitanis 'Spotti' | Spotti Cheddar Pinks | RG |
| Dianthus gratianopolitanis 'Tiny Rubies' | Tiny Rubies Cheddar Pink | RG |
| Dianthus gratianopolitanis 'Tiny Rubies' | Yellow Harmony Dianthus | RG |
| Dianthus gratianopolitanis 'Tiny Rubies' | Late Cloud Pinks | RG |
| Dianthus nardiformis | | RG |
| Dianthus petraeus ssp. noeanus | Balkan White Pinks | RG |
| Dianthus pavonius (neglectus) | Dianthus | RG |
| Dianthus pinifolius | Pineleaf Pinks | RG |
| Dianthus X 'Eastern Star' | Star Eastern Pinks | RG |
| Dianthus X 'First Love' P.S. | First Love Pinks | GP |
| Dianthus X 'Ideal Select Violet' | Ideal Select Violet Pinks | GP |
| Dianthus X 'Neon Star' | Star Neon Pinks | RG |
| Dianthus X 'Pikes Pink' | Pikes Pink Pinks | RG |
| Dianthus X 'Spangled Star' | Spangled Star Dianthus | RG |
| Diascia integerrima 'Coral Canyon' P.S. | Coral Canyon Twinspur | RG |
| Diascia integerrima 'Pink Adobe' | Pink Adobe Twinspur | RG |
| Dicentra formosa 'Aurora' | White Flowers over Grayish foliage | SP |
| Dicentra formosa 'Luxuriant' | Dark Pink Fern-Leaf Bleeding Heart | SP |
| Dicentra spectabilis | Old Fashioned Bleeding Heart | SP |
| Dicentra spectabilis 'Alba' | White Old Fashioned Bleeding Heart | SP |
| Dicentra spectabilis 'Gold Heart' | Gold Heart Bleeding Heart | SP |
| Dicentra X 'Burning Hearts' | Burning Hearts Fern-Lvd.Bleeding Heart | SP |
| Dicentra X 'Ivory Hearts' | Ivory Hearts Fern-Lvd.Bleeding Heart | SP |
| Dicentra X 'King of Hearts' | King of Hearts Fern-Lvd.Bleeding Heart | SP |
| Dictamnus albus 'Albiflorus' | White Gasplant | GP |
| Dictamnus albus 'Purpureus' | Pink Gasplant | GP |
| Digitalis ferruginea | Rusty Foxglove | GP |
| Dierama pauciflorum | Angel's Fishing Rods | GP |
| Digitalis grandiflora | Yellow Foxglove | GP |
| Digitalis hybrida 'Camelot Rose' | Camelot Rose Foxglove | SP/GP |
| Digitalis lanata | Grecian Foxglove | SP |
| Digitalis obscura P.S. | Sunset Foxglove | XP |
| Digitalis purpurea 'Pam's Choice' | Pure White Foxglove (maroon throats) | SP |
| Digitalis purpurea 'Pam's Choice' | Pure White Foxglove (maroon throats) | SP |
| Digitalis purpurea 'Patrick's Pick TG intro | Lavender Foxglove | SP |
| Digitalis thapsi 'Spanish Peaks' P.S. | Spanish Peaks Dwarf Pink Foxglove | SP |
| Doronicum orientale 'Magnificum' | Magnificum Leopards Bane | SP |
| Doronicum orientale 'Magnificum' | Draba | SP |
| Doronicum pentaphyllum ssp. germanicum | Great False Leopard's Bane | SP |
| Draba borealis | Draba | RG |
| Dracocephalum grandiflorum | Showy Dragonhead | XP |
| Dryopteris filix-mas 'Robusta' | Robust Fern | FERN |
| Echinacea angustifolia | Western Coneflower | XP |
| Echinacea pallida | Prairie / Pale Purple Coneflower | XP |
| Echinacea paradoxa | Yellow Coneflower | GP |
| Echinacea purpurea | Purple Coneflower | GP |
| Echinacea purpurea alba 'White Swan' | White Swan Coneflower | GP |
| Echinacea purpurea 'Bravado' | Bravado Coneflower | GP |
| Echinacea purpurea 'Coconut Lime' | White Dbl. Coneflower | GP |
| Echinacea purpurea 'Double Decker' | Double Decker Coneflower | GP |
| Echinacea purpurea 'Fatal Attraction' | Purple-Pink Coneflower | GP |
| Echinacea purpurea 'Green Jewel' | Green Coneflower | GP |
| Echinacea purpurea 'Magnus' | Magnus Coneflower | GP |
| Echinacea purpurea 'Pink Double Delight' | Pink Pompon-like 3" Coneflower | GP |
| Echinacea purpurea 'Prairie Splendor' | Prairie Spendor Coneflower | GP |
| Echinacea purpurea 'Red Knee High' | Red Knee High Coneflower | GP |
| Echinacea purpurea 'Rubinstern' (Ruby Star) | Ruby Star Coneflower | GP |
| Echinacea purpurea 'Virgin' | Fragrant White Coneflower | GP |
| Echinacea tennesseensis | Dark Pink Coneflower | XP |
| Echinacea X 'Big Sky Harvest Moon' | Fragrant Gold Coneflower | GP |
| Echinacea X 'Big Sky Summer Sky' | Peach Coneflower | GP |
| Echinacea X 'Big Sky Sundown' | Orange/Pink Coneflower | GP |
| Echinacea X 'Big Sky Sunrise' | Bright Golden Yellow | GP |
| Echinacea X 'Hot Papaya' | Papaya Coneflower | GP |
| Echinacea X tennesseensis 'Rocky Top Hybrids' | Dark Pink, outstanding | XP |
| Echinops ritro | Globe Thistle | XP |
| Echinops sphaerocephalus 'Arctic Glow' | Arctic Glow Globeflower | XP |
| Echium amoenum P.S. | Red Viper's Bugloss | XP |
| Echium vulgare | Blue Viper's Bugloss | XP |
| Equisetum hyemale | Horsetail Rush | WP |
| Ephedra equisetina P.S. | Blue Stem Joint Fir | XP |
| Ephedra minima | Dwarf Ephedra | RG |
| Epilobium angustifolium | Giant Showy Willowherb/Fireweed | GP |
| Epilobium fleischeri P.S. | Alpine Willowherb | GP |
| Epimedium grandiflorum 'Lilafee' | Lilafee Barrenwort | SP |
| Epimedium pubigerum 'Orange King' | Orange King Barrenwort | SP |
| Epimedium rubrum | Red Barrenwort | SP |
| Epimedium versicolor 'Sulphureum' | Yellow Barrenwort | SP |
| Epimedium youngianum 'Roseum' | Lavender/pink, Bronze-green foliage | SP |
| Eremurus isabellinus 'Cleopatra' | Cleopatra Foxtail Lily | XP |
| Eremurus isabellinus 'Ruiter's Hyb.' | Ruiter's Foxtail Lily | XP |
| Eremurus isabellinus 'Shelford Hybrids Pink' | Shelford Pink Foxtail Lily | XP |
| Eremurus stenophyllus 'Bungel' | Yellow Foxtail Lily | XP |
| Erica carnea 'Alba' | White Heath | SGC |
| Erica carnea 'Pirbight' | Dusky Pink Heath | SGC |
| Erica carnea 'Springwood Pink' | Springwood Pink Heath | SGC |
| Erica X 'Pink Spangles' | Pink Scottish Heather | SGC |
| Erigeron compositus 'Lavender' | Lavender Fleadbane | RG |
| Erigeron glaucus 'Sea Breeze' | Sea Breeze Pink Fleabane | XP |
| Erigeron glaucus 'Sea Breeze' | Sea Breeze Pink Fleabane | XP |
| Erigeron linearis | Threadleaf Fleabane | XP |
| Erigeron scopulinus | Rock Fleabane, Tiny Mat Daisy | RG |
| Eriogonum jamesii | Antelope Sage | XP |
| Eriogonum umbellatum | Sulfur Flower | XP |
| Eriogonum umbellatum 'Kannah Creek' P.S. | Kannah Creek Sulfur Flower | XP |
| Eriogonum umbellatum 'Shasta Sulphur' | Sulfur Flower | XP |
| Eriogonum umbellatum 'Polyanthum' | Purple Leaved Sulfur Flower | XP |
| Eriogonum wrightii | Wright's Buckwheat | XP |
| Erodium 'Dark Eyes' | Double Storks Bill | XP |
| Erodium castellanum | Storksbill | XP |
| Erodium chrysanthum | Yellow Storksbill | XP |
| Erodium triflorum | Storksbill | XP |
| Eryngium agavefolium | Agave- Leaved Sea Holly | XP |
| Eryngium alpinum 'Sapphire Blue' | Sapphire Blue Sea Holly | XP |
| Eryngium planum 'Blue Glitter' | Blue Glitter Sea Holly | XP |
| Eryngium planum 'Blaukappe' | Blue Cap Sea Holly TP | XP |
| Eryngium variifolium | Moroccan Sea Holly | XP |
| Eryngium X 'Paradise Jackpot' | Paradise Jackpot Sea Holly | XP |
| Erysimum cheirii 'Charity Yellow' | Charity Yellow Wallflower | XP |
| Erysimum linifolium 'Bowles Mauve' | Bowles Mauve Wallflower | RG |
| Erysimum X 'John Codrington' | John Codrington Wallflower | RG |
| Erysimum kotschyanum 'Orange Flame' | Orange Flame Wallflower | RG |
| Erysimum X 'Apricot Twist' | Apricot Twist Wallflower | RG |
| Erysimum X 'Fragant Sunshine' | Fragant Sunshine Wallflower | RG |
| Erysimum X 'Fragant Star' | Fragrant Star Wallflower | RG |
| Erysimum X 'Wenlock Beauty' | Wenlock Beauty Wallflower | RG |
| Eschscholzia californica (reseeding Annual) | Several Colors Avail. California Poppy | RG/RA |
| Eucomis comosa 'Sparkling Burgundy' | Pineapple Lily | GP |
| Euonymus colorata | Purple-Leaved Winter Creeper | SP/GC |
| Euonymus fortunei 'Emerald Gaiety' | Variegated Winter Creeper | SP/GC |
| Euonymus fortunei 'Kewensis' | Miniature Winter Creeper | SP/GC |
| Euonymus fortunei 'Sunrise' | Golden Winter Creeper | SP/GC |
| Eupatorium coelestinum (Conoclinium coelstinum) | Mist Flower / Hardy Ageratum | GP |
| Eupatorium dubium 'Little Joe' | Dwarf Joe Pye Weed (3-4') | GP |
| Eupatorium joicus 'Variegated' | Variegated Joe Pye Weed | GP |
| Eupatorium maculatum 'Gateway' | Gateway Joe Pye Weed | GP |
| Eupatorium maculatum 'Phantom' | Dwarf Joe Pye Weed (2-3') | GP |
| Eupatorium rugosum 'Chocolate' | Chocolate Joe Pye Weed | GP |
| Euphorbia amygdaloides 'Helena's Blush' | Helena's Blush Wood Spurge | XP |
| Euphorbia amygdaloides 'Purpurea' | Red Wood Spurge | XP |
| Euphorbia amygdaloides var. robbiae | Robbiae Wood Spurge | XP |
| Euphorbia characias ssp.wufenii | Mediterranean Spurge | XP |
| Euphorbia martinii | Wood Spurge | XP |
| Euphorbia martinii 'Tiny Tim' | Dwarf Wood Spurge | XP |
| Euphorbia nothowlee 'Blackbird' | Blackbird Cushion Spurge | XP |
| Euphorbia polychroma | Cushion Spurge | XP |
| Euphorbia polychroma 'Bonfire' | Bonfire Spurge | XP |
| Euphorbia polychroma 'First Blush' | Variegated, Yellow Bracts/Rosy buds | GP |
| Euphorbia polychroma 'Lacey' | Lacey Cushion Spurge | XP |
| Euphorbia ridgida | Gopher Plant | XP |
| Euphorbia X 'Blue Haze' | Evergreen Spurge | XP |
| Euphorbia X 'Excalibur' | Evergreen Spurge | XP |
| Fallopia aubertii 'Lemon Lace' | Lemon Lace Knotweed | VINE |
| Fallopia japonica 'Variegata' | Variegated Knotweed | GP |
| Filipendula purpurea 'Elegans' | Rosey pink Meadowsweet | SP |
| Filipendula rubra 'Venusta' | Queen of the Prarie | SP |
| Fragaria americana | Strawberry, Wild | GC |
| Fragaria vesca 'Rugen's Improved' | French Runnerless Strawberry | SP |
| Fragaria vesca var.semperflorens 'Alpine Yellow' | White Strawberry | GC |
| Fragaria x 'Lipstick' | Lipstick Strawberry | GC |
| Gaillardia (native; Niobrara shale) | Native Gaillardia | XP |
| Gaillardia aristata | Blanket Flower | XP |
| Gaillardia aristata 'Amber Wheels' | Golden Fluted Gaillardia | XP |
| Gaillardia aristata 'Arizona Sun' | Yellow/Red | XP |
| Gaillardia aristata 'Bijou' | Bijou Gaillardia (petite form of 'Goblin') | XP |
| Gaillardia aristata 'Goblin' (aka 'Kobold) | Goblin Blanket Flower | XP |
| Gaillardia aristata 'Oranges and Lemons' | Orange/Yellow Blanket Flower | XP |
| Gaillardia grandiflora 'Mandarin' | Mandarin Blanket Flower | XP |
| Gaillardia X 'Burgundy' | Burgundy Blanket Flower | XP |
| Gaillardia X 'Fanfare' | Fanfare Blanket Flower | XP |
| Galega officinalis | Goat's Rue | XP |
| Galium odoratum | Sweet Woodruff | SGC |
| Gaultheria procumbens | Wintergreen | SGC |
| Gaura lindheimeri 'Corries Gold' | Corries Gold Gaura | XP |
| Gaura lindheimeri 'Passionate Blush' | Passionate Blush Gaura | XP |
| Gaura lindheimeri 'Pink Cloud' | Pink Cloud Gaura/Butterflies | XP |
| Gaura lindheimeri 'Pink Fountain' | Pink Fountain Gaura/ Butterflies | XP |
| Gaura lindheimeri 'Snow Fountain' | Snow Fountain Gaura/ Butterflies | XP |
| Gaura lindheimeri 'So White' | So White Gaura | XP |
| Gaura lindheimeri 'Siskyou Pink' | Siskyou Pink Gaura | XP |
| Gaura lindheimeri 'The Bride' | The Bride Gaura | XP |
| Gaura lindheimeri 'Whirling Butterflies' | Whirling Butterflies / Gaura | XP |
| Gazania krebsiana 'Tanager' P.S. | Tanager Orange Gazania | RG |
| Gazania linearis 'Colorado Gold' P.S. | Colorado Gold Hardy Gazania | RG |
| Genista tinctoria 'Golden Template' | Dyer's Broom | GC/SH |
| Gentiana acaulis | Gentian | GC/SH |
| Genista X 'Lydia' | Lydia Broom | GC/SH |
| Gentiana 'True Blue' (Makinoi) | Gentian | GP |
| Gentiana parryi x septemfida | Crested Gentian | RG |
| Gentiana septemfida | Crested Gentian | RG |
| Gentiana septemfida var. lagodechiana | Summer Gentian | RG |
| Geranium cantabrigiense 'Biokovo' | Biokovo Geranium | SGC |
| Geranium cantabrigiense 'Cambridge' | Cambridge Geranium | SGC |
| Geranium cantabrigiense 'Crystal Rose' | Crystal Rose Geranium | SGC |
| Geranium cantabrigiense 'Karmina' | Karmina Groundcover Geranium | SGC |
| Geranium cantabrigiense 'Westry' | Westry Groundcover Geranium | SGC |
| Geranium cinereum 'Ballerina' | Ballerina Balkan Geranium | SP/GP |
| Geranium cinereum 'Purple Pillow' | Purple Pillow Geranium | SP/GP |
| Geranium cinereum 'Westry' | Purple Pillow Geranium | SP/GP |
| Geranium cinereum 'Splendens' | Splendens Geranium | SP/GP |
| Geranium lancastriense | Lancaster Geranium | SGC |
| Geranium macrorrhizum 'Bevan's Variety' | Bevan's Variety Geranium | SP/GP |
| Geranium magniflorum 'La Veta Lace' P.S | La Veta Lace Cranesbill | SP/GP |
| Geranium sanguineum | Bloody Cranesbill | SP/GP |
| Geranium sanguineum 'Album' | White Bloody Cranesbill | SP/GP |
| Geranium sanguineum 'Max Frei' | Bloody Cranesbill Max Frei | SP/GP |
| Geranium sanguineum v. striatum | Dwarf Pink Bloody Cranesbill | SP/GP |
| Geranium sanguineum 'Max Frei' | Max Frei Cranesbill | SP/GP |
| Geranium sanguineum 'Vision Violet' | Vision Violet Cranesbill | SP/GP |
| Geranium sanguineum 'Vision Violet' | Ann Folkard Geranium | SP/GP |
| Geranium X 'Ann Folkard' | Ann Folkard Cranesbill | SP/GP |
| Geranium X 'Blue Blood' | Blue Blood Cranesbill | SP/GP |
| Geranium X 'Blue Sunrise' | Blue Sunrise Cranesbill | SP/GP |
| Geranium X 'Jolly Bee' | Jolly Bee Hybrid Geranium | SP/GP |
| Geranium X 'Prefect Storm' | Perfect Storm Hybrid Geranium | SP/GP |
| Geranium X 'Rozanne' | Rozanne Cranesbill | SP/GP |
| Geranium X 'St.Ola' | Pink/violet Cranesbill | SP/GP |
| Geranium X 'Tiny Monster' | Tiny Monster Geranium | SP/GP |
| Geum chiloense 'Blazing Sunset' | Red Geum | GP |
| Geum chiloense 'Mrs. Bradshaw' | Double Orange-Scarlet | GP |
| Geum chiloense 'Lady Stratheden' | Goldball Geum | GP |
| Geum coccineum 'Borisii' | Red-Orange Geum | GP |
| Geum coccineum 'Cooky' | Orange Flowered Geum | GP |
| Geum triflorum | Prairie Smoke | GP |
| Gilia aggregata | Scarlet Gilia | RG |
| Gilia rubra (Ipomopsis rubra) | Standing Cypress | RG |
| Gladiolus italicus | Sword Lily, Italian Gladiolus, ^18" | XP |
| Glaucium corniculatum | Blackspot Horned Poppy | XP |
| Glaucium flavum | Horned Poppy | XP |
| Glaucium flavum var.aurantiacum | Red/Orange Horned Poppy | XP |
| Glaucium grandiflorum | Bristly Horned Poppy | XP |
| Goniolmon collinum 'Sea Spray' | Statice | XP |
| Graptopetalum rushby | Arizona Ghost Plant | XP |
| Gypsophila paniculata 'Festival Star' | Festical White Babys Breath | XP |
| Gypsophila paniculata 'Pink Fairy' | Pink Double Baby's Breath | XP |
| Gypsophila paniculata 'Perfecta' | Long Flowering Double White | XP |
| Gypsophila paniculata 'Snowflake' | Double White Baby's Breath | XP |
| Gypsophila repens 'Alba' | White Creeping Baby's Breath | XGC |
| Gypsophila repens 'Rosea' | Rose Creeping Baby's Breath | XGC |
| Hebe cupressoides 'Nana Hebe' | Dwarf Hebe | RG |
| Hedera helix 'Baltica' | Baltica English Ivy | SGC |
| Hedera helix 'Baltica Variegated'(Glacier) | Variegated English Ivy | SGC |
| Hedera helix 'Minima' | Miniature English Ivy | SGC |
| Hedera helix 'Pixie' | Pixie English Ivy | SGC |
| Hedera helix 'Snow Pixie' | Snow Pixie Varig. English Ivy | SGC |
| Hedera helix 'Spetchley' | Spetchley Mini English Ivy | SGC |
| Helenium X 'Coppelia' | Coppelia Sneezeweed | GP |
| Helenium X 'Moerheim Beauty' | Moerheim Beauty Sneezeweed | GP |
| Helenium X 'Red Jewel' | Red Jewel Sneezeweed | GP |
| Helenium X 'Sahin's Early Flowerer' | Sahin's Sneezeweed | GP |
| Helianthemum croceum 'White' | White Rock/Sun Rose | RG |
| Helianthemum nummularium 'Ben Moore' | Bright Orange Sun Rose | RG |
| Helianthemum nummularium 'Ben Nevis' | Orange w/ maroon Center Sunrose | RG |
| Helianthemum nummularium 'Cheviot' | Peach w/yellow center Sunrose Gray Leaves | RG |
| Helianthemum nummularium 'Dazzler' | Magenta Red Sunrose | RG |
| Helianthemum nummularium 'Henfield Brilliant' | Coppery Orange Sunrose | RG |
| Helianthemum nummularium 'Saint Mary's' | Single White Sun Rose | RG |
| Helianthemum nummularium 'Single Yellow' | Single Yellow /Sun Rose | RG |
| Helianthemum nummularium 'Wisley Pink' | Pink Sunrose w/ silvery foliage | RG |
| Helianthemum nummularium 'Wisley Primrose' | Yellow Sunrose/ fuzzy foliage | RG |
| Helianthus X 'Lemon Queen' | Lemon Queen Sunflower | GP |
| Helianthus maximilianii 'Lemon Yellow' | Lemon Yellow Sunflower | XP |
| Helianthus maximilianii 'Dakota Sunrise' | Dakota Sunrise Sunflower | XP |
| Helianthus maximilianii 'Santa Fe' | Santa Fe Sunflower | XP |
| Helichrysum plicatum | Wooly Strawflower | XP |
| Heliopsis helianthoides 'Ballerina' | Ballerina False Sunflower | GP |
| Heliopsis helianthoides 'Summer Nights' | Summer Nights Heliopsis | GP |
| Heliopsis helianthoides 'Tuscan Sun' | Tuscan Sun Heliopsis | GP |
| Helleborus foetidus | Bear Claw / Stinking Hellebore | SP |
| Helleborus niger | Christmas Rose | SP |
| Helleborus orientalis 'Apricot Blush' | Apricot Lenten Rose | SP |
| Helleborus orientalis 'Black Diamond' | Mixed Double flwrs. | SP |
| Helleborus orientalis 'Pink Parachutes' | Pink Parachutes Daylily | SP |
| Helleborus orientalis 'Royal Heritage Strain' | Range from White-Black flowers | SP |
| Helleborus orientalis 'Sally' | Sally Daylily | SP |
| Helleborus x 'Red Shades' | Red Shades Lenten Rose | SP |
| Hemerocallis X 'Alabama Jubilee' | Red-Orange Daylily | GP |
| Hemerocallis X 'Barbara Mitchell' | Barbara Mitchell Daylily | GP |
| Hemerocallis X 'Bela Lugosi' | Purple w/Lime Green Throat Daylily | GP |
| Hemerocallis X 'Bold Tiger' | Orange/Red Daylily | GP |
| Hemerocallis X 'Challenger' | Challenger Daylily | GP |
| Hemerocallis X 'Cherry Cheeks' | Red | GP |
| Hemerocallis X 'Frans Hals' | Bicolor, orange sepals/copper petals | GP |
| Hemerocallis X 'Going Bananas' | Dwf.Everblooming Yellow Daylily | GP |
| Hemerocallis X 'Happy Returns' | Dwarf Recurrent Yellow Daylily | GP |
| Hemerocallis X 'Hush Little Baby' | Pink Daylilly | GP |
| Hemerocallis X 'Hyperion' | Fragrant Lemon Yellow Daylily | GP |
| Hemerocallis X 'Ice Carnival' | Pale-Lemon Yellow Daylily | GP |
| Hemerocallis X 'Inwood' | Peach Daylily | GP |
| Hemerocallis X 'Jolyene Nichole' | Pink Daylily | GP |
| Hemerocallis X 'Love Those Eyes' | Yellow w/Red Daylily | GP |
| Hemerocallis X 'Pardon Me' | Cranberry Red Daylily (petite red rebloomer) | GP |
| Hemerocallis X 'Prairie Blue Eyes' | Lavender/Purple w/Yellow Eye Daylily | GP |
| Hemerocallis X 'Red Razzmatazz' | Red Daylily | GP |
| Hemerocallis X 'Rocket City' | Orange/Yellow Daylily | GP |
| Hemerocallis X 'Rosy Returns' | Rose-Pink/Deep Rose Daylily | GP |
| Hemerocallis X 'Ruby Stella' | Red Daylily | GP |
| Hemerocallis X 'Siloam Double Classic' | Pink Reblooming Daylily | GP |
| Hemerocallis X 'Siloam Peony Display' | Peach Reblooming Daylily | GP |
| Hemerocallis X 'Spellbinder' | Golden Daylily | GP |
| Hemerocallis X 'Spider Miracle' | Chartreuse Daylily | GP |
| Hemerocallis X 'Stella d'Oro' | Dwarf Bright Gold Daylily | GP |
| Hepatica americana | Liverleaf | GP |
| Heracleum lehmannianum | Hogweed | XP |
| Hernaria glabra | Rupturewort | RG |
| Hernaria glabra 'Sea Foam' | Sea Foam Rupturewort | RG |
| Heterotheca jonesii | Jones False Goldenaster | RG |
| Heuchera micrantha 'Palace Purple' | Palace Purple Heuchera | SP |
| Heuchera sanguinea 'Bressingham Hybrids' | Bressingham Hybrid Coralbells | SP |
| Heuchera sanguinea 'Firefly' | Firefly Coralbells | SP |
| Heuchera sanguinea 'Snow Angel' P.S. | Snow Angel Coralbells | SP |
| Heuchera X 'Canyon Duet' | Canyon Duet Coral Bells | SP |
| Heuchera X 'Caramel' | Caramel Coral Bells | SP |
| Heuchera X 'Citronelle' | Citronelle Heuchera (chartreuse) | SP |
| Heuchera X 'Crimson Curls' | Crimson Curls Daylily | SP |
| Heuchera X 'Crista' | Crista Daylily | SP |
| Heuchera X 'Georgia Peach' | Georgia Peach Heuchera | SP |
| Heuchera X 'Hercules' | Varig.Foliage/Red flwrs. Coralbells | SP |
| Heuchera X 'Hollywood' | Red flwrs. Coralbells | SP |
| Heuchera X 'Marmalade' | Marmalade Coralbells | SP |
| Heuchera X 'Midnight Rose' | Midnight Rose Heuchera | SP |
| Heuchera X 'Miracle' | Miracle Heuchera | SP |
| Heuchera X 'Mocha' | Mocha Coralbell (dark purple) | SP |
| Heuchera X 'Obsidian' | Deep Purple Leaves Coralbells | SP |
| Heuchera X 'Peach Flambe' | Peach Flambe Coralbells | SP |
| Heuchera X 'Peach Melba' | Peach Melba Coralbells | SP |
| Heuchera X 'Petite Pearl Fairy' | Petite Pearl Fairy Coralbells | SP |
| Heuchera X 'Rave On' | Rave On Coralbells | SP |
| Heuchera X 'Silver Scrolls' | Silver/Purple Heuchera | SP |
| Heuchera X 'Tiramisu' | Tiramisu Heuchera | SP |
| Heuchera X 'Venus' | Venus Heuchera | SP |
| Hibiscus moscheutos 'Blue River II' | Blue River II Hibiscus | GP |
| Hibiscus moscheutos 'Crown of Jewels' | Cream/Red flwrs. Maple cut Leaves | GP |
| Hibiscus moscheutos 'Fireball' | Fireball Hibiscus | GP |
| Hibiscus moscheutos 'Jazzberg Jam' | Jazzberg Jam Hibiscus | GP |
| Hibiscus moscheutos 'Kopper King' | Kopper King Hibiscus | GP |
| Hibiscus moscheutos 'Lord Baltimore' | Lord Baltimore Hibiscus | GP |
| Hibiscus moscheutos 'Summer Storm' | Summer Storm Hibiscus | GP |
| Hibiscus moscheutos 'Turn of the Century' | Turn of the Century Hibiscus | GP |
| Hibiscus X 'Plum Crazy' | Plum Crazy Hibiscus | GP |
| Hosta fortunei 'Francee' | Dark Green/ Bright White Margin | SP |
| Hosta fortunei 'Gold Standard' | Green/ Creamy White Center | SP |
| Hosta fortunei 'Great Expectations' | Lrg.-leaved/Varig. Hosta | SP |
| Hosta fortunei 'Patriot' | Patriot Hosta | SP |
| Hosta nigrescens | | SP |
| Hosta sieboldiana 'Elegans' | Elegans Hosta | SP |
| Hosta undulata 'Albo Marginata' | Variegated Hosta | SP |
| Hosta 'August Moon' | Large Golden Yellow Hosta | SP |
| Hosta 'Blue Angel' | Enormous Blue/Green Hosta | SP |
| Hosta 'Blue Cadet' | Blue Cadet Hosta | SP |
| Hosta 'Blueberry Muffin' | Blueberry Muffin Hosta | SP |
| Hosta 'Blue Ivory' | Blue Ivory Hosta | SP |
| Hosta 'Blue Umbrellas' | Blue Umbrellas Hosta | SP |
| Hosta 'Brim Cup' | Medium Green Heart Shaped | SP |
| Hosta 'Fire Island' | Fire Island Hosta | SP |
| Hosta 'Fire and Ice' | Fire and Ice Hosta | SP |
| Hosta 'Fireworks' | Fireworks Hosta | SP |
| Hosta 'Frances Williams' | Frances Williams Hosta | SP |
| Hosta 'Gold Edger' | Gold Edger Hosta | SP |
| Hosta 'Golden Tiara' | Golden Tiara Hosta | SP |
| Hosta 'Great Expectations' | Great Expectations Hosta | SP |
| Hosta 'Guacamole' | Guacamole Hosta | SP |
| Hosta 'Honeybells' | Honeybells | SP |
| Hosta 'Krossa Regal' | Krossa Regal Hosta | SP |
| Hosta 'Red October' | Red October Hosta | SP |
| Hosta 'Reversed Patriot' | Dark Green/ Creamy White Center | SP |
| Hosta 'Royal Standard' | Rich Green Foliage. Fragrant | SP |
| Hosta 'Sea Fire' | Sea Fire Hosta | SP |
| Hosta 'Sum and Substance' | Chartreuse/Yellow Leaves | SP |
| Hosta 'Sun Power' | Sun Power Hosta | SP |
| Hosta 'Wide Brim' | Wide Brim Hosta | SP |
| Hosta 'Winfield Blue' | Blue/ One of the Best | SP |
| Houttuynia cordata 'Chameleon' | Chameleon Plant | GC |
| Humulus lupulus 'Aureus' | Golden Hop Vine | VINE |
| Hydrangea arborescens 'Annabelle' | Pink Hydrangea | SHRUB |
| Hydrangea paniculata 'Pinky Winky' | Pink Hydrangea | SHRUB |
| Hymenoxys acaulis v. caespitosa | Sundancer Daisy | RG |
| Hymenoxys grandiflora | Old Man on the Mountain | RG |
| Hymenoxys scaposa 'Prairie Sunshine' HCG | Prairie Sunshine Hymenoxys | RG |
| Hypericum androsaemum 'October Revolution' | October RevolutionSt Johnswort | GP |
| Hypericum calycinum | St Johnswort | RG |
| Hypericum patulum 'Hidcote' | Hidcote St Johnswort | RG |
| Hypericum reptans | Groundcover St. Johns Wort | GP |
| Hyssopus sp. | Hyssop | GP |
| Iberis 'Daglori Gem' | Daglori Gem Candytuft | RG |
| Iberis sempervirens 'Alexander's White' | Alexander's White Candytuft | RG/GC |
| Iberis sempervirens 'Autumn Snow' | Autumn Snow White Candytuft | RG |
| Iberis sempervirens 'Little Gem' | Little Gem Candytuft | RG/GC |
| Iberis sempervirens 'Little Gem' | Candytuft | RG/GC |
| Iberis sempervirens 'Purity' | Purity Candytuft | RG/GC |
| Iberis sempervirens 'Snowflake' | Snowflake Candytuft | RG/GC |
| Incarvillea delavayi | Hardy Gloxinia | SP |
| Inula rhizocephala | Himilayan Sunflower | XP |
| Ipomoea leptophylla | Bush Morning Glory | XP |
| Ipomopsis rubra (Gilia rubra) | Standing Cypress | XP |
| Iris chrysographes 'Black Form' | Black Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris cristata | Woodland Iris | GP |
| Iris germanica 'Baby Blessed' | Baby Blessed Bearded Iris | GP |
| Iris germanica 'Cat's Eye' | Cat's Eye Bearded Iris | GP |
| Iris germanica 'Forever Blue' | Forever Blue Bearded Iris | GP |
| Iris germanica 'Puddy Tat' | Puddy Tat Bearded Iris | GP |
| Iris germanica 'Trajectory' | Trajectory Bearded Iris | GP |
| Iris lactea | Mongolian Iris | GP |
| Iris louisiana 'Sinfonietta' | Sinfonietta Iris | WP |
| Iris missouriensis | Blue Flag Iris | GP |
| Iris pallida 'Aureo-Variegata' | Zebra Iris | GP |
| Iris pallida 'Variegata' | Variegated Iris/ Zebra | GP |
| Iris pseudacorus 'Variegata' | Yellow Flag/Water Iris | WP |
| Iris pumila 'Boo' | Dwarf Bearded Iris White/Purple | GP |
| Iris pumila 'Fireplace Embers' | Dwarf Bearded Iris red | GP |
| Iris pumila 'What Again' | Dwarf Bearded Iris Lav./Yellow | GP |
| Iris setosa v. artica (canadense nana) | Dwarf Canadian / Artic Iris | GP |
| Iris sibirica 'Butter & Sugar' | Butter & Sugar Siberian Iris | GP |
| Iris sibirica 'Caesar's Brother' | Caesar's Brother Siberian Iris | GP |
| Iris sibirica 'Ruffled Velvet' | Deep Violet Siberian Iris | GP |
| Iris sibirica 'Snow Queen' | Snow Queen Siberian Iris | GP |
| Iris spuria 'White Swirl' | softly ruffled wide, white petals | GP |
| Iris x louisiana 'Black Gamecock' | Black Lousiana Iris | WP |
| Isotoma fluviatilis 'Blue Star Creeper' | Blue Star Creeper | GC |
| Jovibarba hirta ssp. Arenaria | Miniature Hen and Chickens | RG |
| Kerria japonica | Japanese Kerria | SP |
| Kerria japonica 'Picta' | Variegated Japanese Kerria | SP |
| Kitagawia terebinthacea | Kitagawia-Russian | XP |
| Knautia macedonica 'Mars Midget' | Mars Midget Red Pincushion | GP |
| Kniphofia bruceae | | XP |
| Kniphofia caulescens P.S. | Blue-Leaf Hot Poker | XP |
| Kniphofia hirsuta 'Fire Dance' | Dwarf Bicolor Torch Flower | XP |
| Kniphofia hirsuta 'Traffic Lights' | Traffic Lights Red/Amber/Green HP | XP |
| Kniphofia hirsuta | Hirsutan Torch Flower | XP |
| Kniphofia northiae | Octopus Red Hot Poker | XP |
| Kniphofia triangularis | Orange Hot Poker | XP |
| Kniphofia uvaria | Red Hot Poker | XP |
| Kniphofia X 'Alcazar' | Alcazar Fire Red Hot Poker | XP |
| Kniphofia X 'Cobra' | Cobra Kniphofia | XP |
| Kniphofia X 'Early Gold' | Early Flowering Red Hot Poker | XP |
| Kniphofia X 'Flamenco' | Flamenco Red Hot Poker | XP |
| Kniphofia X 'Nancy's Red' | Nancy's Red Hot Poker | XP |
| Kniphofia X 'Royal Standard' | Royal Standard Red Hot Poker | XP |
| Kniphofia X 'Shining Sceptre' | Golden Orange Red Hot Poker | XP |
| Kniphofia X 'Wayside Flame' | Wayside Flame Red Hot Poker | XP |
| Lamiastrum galeobdolon 'Variegatum' | Silver Nettle | SGC |
| Lamiastrum galeobdolon 'Silver Spangles' | Silver Spangles Yellow Archangel | SGC |
| Lamium maculatum 'Ann Greenway' | Silver/Golden Spotted Dead Nettle | SGC |
| Lamium maculatum 'Aureum' | Golden Spotted Dead Nettle | SGC |
| Lamium maculatum 'Red Nancy' | Red Nancy Dead Nettle | SGC |
| Lamium maculatum 'Orchid Frost' | Orchid Frost Dead Nettle | SGC |
| Lamium maculatum 'Pink Chablis' | Pink Chablis Dead Nettle | SGC |
| Lamium maculatum 'Pink Pewter' | Pink Pewter Dead Nettle | SGC |
| Lamium maculatum 'Purple Dragon' | Purple Dragon Dead Nettle | SGC |
| Lamium maculatum 'Shell Pink' | Shell Pink Dead Nettle | SGC |
| Lamium maculatum 'White Nancy' | White Nancy Dead Nettle | SGC |
| Lavandula angustifolia 'Blue Cushion' | Blue Cushion English Lavender | XP |
| Lavandula angustifolia 'Blue River' | Blue River English Lavender | XP |
| Lavandula angustifolia 'Hidcote Superior' | Hidcote Superior English Lavender | XP |
| Lavandula angustifolia 'Jean Davis' | Jean Davis English Lavender | XP |
| Lavandula angustifolia 'Lavance Purple' | Lavance Purple Lavender | XP |
| Lavandula angustifolia 'Miss Katherine' | Miss Katherine English Lavender | XP |
| Lavandula angustifolia 'Mitcham's Gray' | Mitchams Gray English Lavender | XP |
| Lavandula angustifolia 'Royal Velvet' | Royal Velvet English Lavender | XP |
| Lavandula angustifolia 'Ellegance Ice' | Ellegance Ice English Lavender | XP |
| Lavandula angustifolia 'Ellegance Purple' | Ellegance Purple English Lavender | XP |
| Lavandula angustifolia 'Lady' | Lady English Lavender | XP |
| Lavandula angustifolia 'Munstead' | Munstead English Lavender | XP |
| Lavandula angustifolia nana | Dwarf Blue English Lavender | XP |
| Lavandula angustifolia 'Sharon Roberts' | Sharon Roberts English Lavender | XP |
| Lavandula angustifolia 'Thumbelina Leigh' | Thumbelina Leigh English Lavender | XP |
| Lavandula angustifolia 'Twickle Purple' | Twickle Purple English Lavender | XP |
| Lavandula angustifolia 'Vera' | Vera English Lavender | XP |
| Lavandula angustifolia 'Violet Intrigue' | Violet Intrigue Enlish Lavender | XP |
| Lavandula X intermedia 'Grosso' | Purple Hybrid Lavender | XP |
| Lavandula X intermedia 'Provence' | Provence Hybrid Lavender | XP |
| Lavandula lanata | Wooly Lavender | XP |
| Lavandula stoechas 'Violet Lace' | Spanish Lavender (Tender) | TXP |
| Lavandula X 'England' HCG | Hybrid Lavender | XP |
| Lavandula X 'Lisa Marie' | Lisa Marie Lavender | XP |
| Lavatera thuringiaca 'Red Rum' | Red Rum Tree Mallow | GP |
| Lavatera X clementii 'Barnsley Baby' | Tree Mallow | GP |
| Leontopodium alpinum | Edelweiss | RG |
| Leptinella perpusilla (cotula) | Brass Buttons | RG/GC |
| Leptinella 'Platt's Black' | Platt's Black Brass Buttons | RG/GC |
| Leucanthemum serotinum 'Herbstern' | Autumn Star Michaelmas Daisy | GP |
| Leucanthemum X superbum 'Aglaia' | Agalaia Shasta Daisy | GP |
| Leucanthemum X superbum 'Broadway Lights' | Broadway Lights Shasta Daisy | GP |
| Leucanthemum X superbum 'Banana Cream' | Banana Cream Shasta Daisy | GP |
| Leucanthemum X superbum 'Becky' | Becky Shasta Daisy | GP |
| Leucanthemum X superbum 'Gold Rush' | Gold Rush Shasta Daisy | GP |
| Leucanthemum X superbum 'Ice Star' | Ice Star Shasta Daisy | GP |
| Leucanthemum X superbum 'Snowcap' | Snowcap Shasta Daisy | GP |
| Leucanthemum X superbum 'Sonnenschein' | Sunshine Shasta Daisy | GP |
| Leucanthemum X superbum 'Summer Snowball' | Summer Snowball Shasta Daisy | GP |
| Lewisia cotyledon | Bitterroot | RG |
| Lewisia cotyledon 'Sunset Group' | Sunset Bitteroot | RG |
| Lewisia rediviva | Wyoming Bitteroot | RG |
| Lewisia X 'Little Plum' | Bitteroot | RG |
| Liatris punctata | Dotted Gayfeather | XP |
| Liatris spicata | Native Gayfeather | GP |
| Liatris spicata 'Floristan Violet' | Gayfeather | GP |
| Liatris spicata 'Kobold Original' (Vegetative Form) | Gayfeather | GP |
| Liatris spicata 'Kobold' (seed form) | Kobold Gayfeather | GP |
| Liatris spicata 'Floristan White' | White Gayfeather | GP |
| Ligularia dentata 'Britt-Marie Crawford' | Chocolate colored Leaves | SP |
| Ligularia stenocephala 'Little Rocket' | Dwarf form of 'The Rocket' | SP |
| Ligularia stenocephala 'The Rocket' | Bright Yellow/ Serrated Heart-shape | SP |
| Ligularia tangutica | Leopard Plant | SP |
| Ligularia 'Osiris Café Noir' | Purple/Bronze/Olive Leaves | SP |
| Ligularia 'Osiris Fantaisie' | Osiris Fantaisie Ligularia | SP |
| Lilium asiatic 'Abbeville's Pride' | Abbeville's Pride Asiatic Lily | GP |
| Lilium asiatic 'Bright Pixie' | Bright Pixie Asiatic Lily | GP |
| Lilium asiatic 'Pink Pixie' | Pink Pixie Asiatic Lily | GP |
| Lilium asiatic 'Sweet Lord' | Sweet Lord Asiatic Lily | GP |
| Lilium asiatic 'Tango Tiger Play' | Golden Orange Asiatic Lily | GP |
| Lilium formosanum 'Pricei' | Fragrant dwarf Lily | SP |
| Lilium formosanum 'Pricei' | Fragrant dwarf Lily | GP |
| Lilium formosanum 'Pricei' | Fragrant dwarf Lily | GP |
| Lilium dwf. Oriental 'Garden Party' | Garden Party Dwarf Lily | GP |
| Lilium dwf. Oriental 'Miss France' | Miss France Dwarf Lily | GP |
| Lilium dwf. Oriental 'Mona Lisa' | Mona Lisa Dwarf Lily | GP |
| Lilium dwf. Oriental 'Rodolfa' | Rodolfa Dwarf Lily | GP |
| Lilium tigrinum 'Splendens Flora Pleno' | Splendens Tiger Lily | GP |
| Lilium tigrinum 'Tiger Pink' | Tiger Pink Tiger Lily | GP |
| Lilium tigrinum 'Tiger Orange' | Tiger Orange Tiger Lily | GP |
| Lilium tigrinum 'Tiger Red' | Tiger Red Tiger Lily | GP |
| Lilium tigrinum 'Tiger Yellow' | Tiger Yellow Tiger Lily | GP |
| Limonium bicolor | Sea Lavender | GP |
| Limonium binervosum | Rock Sea Lavender | GP |
| Limonium gmelinii | Siberian Statice | GP |
| Limonium latifolium | Sea Lavender Statice | GP |
| Linum dolomiticum | Dolomite Flax | XP |
| Linum flavum 'Compactum' | Golden Flax | RG |
| Linum lewisii 'Appar' | South Dakota Blue Flax | XP |
| Linum narbonense | Narbonne Flax | XP |
| Linum perenne 'Sapphire' | Sapphire Blue Flax | XP |
| Lithodora diffusa 'Grace Ward' | Grace Ward Lithodora | RG/GC |
| Lobelia cardinalis (speciosa) 'Fan Scarlet' | Cardinal Flower | SP |
| Lobelia (speciosa) 'Compliment Deep Red' | Cardinal Flower | SP |
| Lobelia fulgens 'Elm Fire' | Cardinal Flower | SP |
| Lotus corniculatus 'Plenaflorus' | Bird's Foot Trefoil | XGC |
| Lupinus polyphyllus 'Gallery Blue' | Gallery Series Dwarf Lupine | GP |
| Lupinus polyphyllus 'Gallery Pink' | Gallery Series Dwarf Lupine | GP |
| Lupinus polyphyllus 'Gallery Red' | Gallery Series Dwarf Lupine | GP |
| Lupinus polyphyllus 'Gallery White' | Gallery Series Dwarf Lupine | GP |
| Lupinus polyphyllus 'Gallery Yellow' | Gallery Series Dwarf Lupine | GP |
| Lupinus polyphyllus 'Noble Maiden' | Noble Maiden Tall Lupine | GP |
| Lupinus polyphyllus 'My Castle' | My Castle Tall Lupine | GP |
| Lupinus polyphyllus 'The Chandelier' | The Chandelier Tall Lupine | GP |
| Lupinus polyphyllus 'The Chantelaine' | The Chantelaine Tall Lupine | GP |
| Lupinus polyphyllus 'The Govenor' | The GovenorTall Lupine | GP |
| Lupinus regalis 'Morello Cherry' | Red Lupine | GP |
| Lychnis arkwrightii 'Orange Knome' | Dwarf Orange Catchfly | XP |
| Lychnis chalcedonica | Maltese Cross | XP |
| Lychnis coronaria | Rose Campion | XP |
| Lychnis coronaria 'Atrosanguinea' | Red-Purple Flowered Rose Campion | XP |
| Lychnis flos-cuculi 'White' | White Catchfly | XP |
| Lychnis viscaria splendens 'Firebird' | Firebird Catchfly | XP |
| Lychnis x arkwrightii 'Vesuvius' | Catchfly | XP |
| Lychnis x haageana 'Molten Lava' | Catchfly | XP |
| Lysimachia ciliata 'Firecracker' | Firecracker Loosestrife | SP |
| Lysimachia ciliata ' Purpurea' | Purpurea Loosestrife | SP |
| Lysimachia clethroides | Lady Jane Loosestrife | SP |
| Lysimachia nummularia | Green Moneywort | SGC |
| Lysimachia nummularia 'Aurea' | Gold Moneywort | SGC |
| Lysimachia punctata | Yellow Loosestrife | SP |
| Lysimachia punctata 'Golden Alexander' | Variegated Loostrife | SP |
| Lysimachia x 'Snow Candle' | Snow Candle Loosestrife | SP |
| Machaeranthera bigelovii | Bigelow's Machaeranthera, asterish | XP |
| Macleaya cordata | Plume Poppy | GP |
| Mahonia repens | Creeping Mahonia | XGC |
| Malva alcea 'Fastigiata' | Pink Hollyhock Mallow | GP |
| Malva moschata 'Pink Perfection' | Pink Perfection Musk Mallow | GP |
| Malva moschata 'White Perfection' | White Perfection Musk Mallow | GP |
| Malva sylvestris 'Mystic Merlin' | Mystic Merlin Mallow | GP |
| Malva sylvestris 'Zebrina' | Zebrina Tree Mallow | GP |
| Marrubium cylleneum | Greek Horehound | XP |
| Marrubium globosum | Horehound | XP |
| Marrubium rotundifolia P.S. | Silverheels Horehound | XP |
| Marrubium vulgare | White Horehound | XP |
| Matteuccia struthiopteris | Ostrich Fern | FERN |
| Mazus reptans | Mazus | GC |
| Mazus reptans 'Alba' | White Mazus | GC |
| Melampodium leucanthemum | Blackfoot Daisy | XP |
| Mimulus cardinalis | Scarlet Monkey Flower | SP |
| Mimulus guttatus | Common Yellow Monkey Flower | SP |
| Mimulis primuloides ssp.linearifolius | Primrose Monkeyflower | SP |
| Mirabilis multiflora | Desert Four O'Clock | XP |
| Mirabilis multiflora | Grand Marshall Bee Balm | GP |
| Monarda X 'Coral Reef' | Coral Reef Beebalm | GP |
| Monarda X 'Jacob Cline' | Jacob Cline Beebalm | GP |
| Monarda X 'Raspberry Wine' | Raspberry Wine Beebalm | GP |
| Muehlenbeckia axillaris 'Nana' | Creeping Wirevine | WGC |
| Mukdenia rosii 'Karasuba' | Red Leafed Mukdenia | SP |
| Myosotis palustris | Forget-me-not | SGC |
| Neohenricia sibbettii | Tiny Pebbles Iceplant | RG |
| Nepeta faassenii 'Kit Kat' | Kit Kat Catmint | XGC |
| Nepeta faassenii Select Blue | Select Blue Catmint | XGC |
| Nepeta faassenii 'Six Hills Giant' | Six Hills Giant Catmint | XGC |
| Nepeta faassenii 'Walker's Low' | Walker's Low Catmint | XGC |
| Nepeta Psfike 'Little Trudy' P.S. | Little Trudy compact Catmint | XGC |
| Nepeta sibirica 'Souvenir D'Andre Chaudron | 2-3'H | GP |
| Nepeta subsessiles 'Cool Cat' | Rose pink/ Dk. Green foliage | XP |
| Nepeta x 'Joanna Reed' | Joanna Reed Catmint | XGC |
| Oenothera caespitosa | Tufted Evening Primrose | XP |
| Oenothera fruticosa 'Sonnenwende' | Sonnenwende Sundrops | GP |
| Oenothera 'Lemon Drop' | Lemon Drop Sundrops | XP |
| Oenothera macrocarpa (missourensis) | Missouri / Ozark Sundrops | XP |
| Oenothera macrocarpa ssp. fremontii 'Incana' | Thinleaf Prairie Sundrops | XP |
| Oenothera macrocarpa ssp. fremontii 'Shimmer' HCG | Shimmer' Thinleaf Prairie Sundrops | XP |
| Oenothera macrocarpa ssp. fremontii 'Silver Wings' | Silver Wings Sundrops | XP |
| Oenothera macrocarpa var. incana 'Pewter Moon' | Pewter Moon Sundrops | XP |
| Oenothera macrocarpa var. incana 'Silver Blade' P.S. | Silver Blade Sundrops | XP |
| Oenothera pilosella 'Yella Fella' | Yella Fella Sundrops | XP |
| Oenothera speciosa | Pink Evening Primrose | XP |
| Oenothera x 'Comanche Campfire' | Silverleaf Sundrops | XP |
| Ophiopogon japonicum 'Pygmaeus' | Super Dwarf Mondo Grass | SP |
| Ophiopogon japonicum 'Silver Dragon' | Silver Dragon Dwarf Mondo Grass | TSP |
| Ophiopogon planiscapus 'Nigrescens' | Black Mondo Grass | SP |
| Origanum laevigatum 'Aureum' | Golden Oregano | GC |
| Origanum laevigatum 'Herrenhausen' | Herrenhausen Oregano | XP |
| Origanum laevigatum 'Hopley's Purple' | Hopley's Purple Oregano | XP |
| Origanum laevigatum 'Pilgrim' | Pilgrim Oregano | XP |
| Origanum laevigatum 'Rotekugel' | Rotekugel Oregano | XP |
| Origanum libanoticum P.S. | Hopflower Oregano | XP |
| Origanum rotundifolium 'Kent Beauty' | Kent Beauty Oregano | XP |
| Origanum vulgare 'Country Cream' | Oregano | GC |
| Origanum vulgare 'Woods Compact' | Woods Compact Oregano | GC |
| Origanum X 'Amethyst Falls' | Amethyst Falls Oregano | XP |
| Origanum X 'Rosenkuppel' | Rosenkuppel Oregano | XP |
| Origanum X 'Rougehouse' | Rougehouse Oregano | XP |
| Orostachys aggregeatus | Dunce Caps | RG |
| Orostachys malacophyllus | Dunce Caps | RG |
| Orostachys minutum | Dunce Caps | RG |
| Orostachys spinosus | Dunce Caps | RG |
| Osmunda cinnamonea | Cinnamon Fern | FERN |
| Osmunda regalis | Royal Fern | FERN |
| Osteospermum 'Avalanche' P.S. | White Mountain Sun Daisy | GP |
| Osteospermum b.v. compactum 'Purple Mountain' P.S. | Purple Mountain Sun Daisy | GP |
| Osteospermum ecklonis 'Lavender Mist' P.S. | Lavender Mist Sun Daisy | GP |
| Othonna capensis | Little Pickles Hardy Succulent | RG |
| Oxalis crassipes 'Rosea' | Rose Oxalis | SP |
| Pachysandra terminalis 'Green Carpet' | Japanese Spurge | SGC |
| Paeonia 'Ben Franklin' (Dbl. Red) | Ben Franklin Peony | GP |
| Paeonia 'Bowl of Beauty' (pink/white) | Bowl of Beauty Peony | GP |
| Paeonia 'Buckeye Belle' (dark red semi dbl) | Buckeye Belle Peony | GP |
| Paeonia 'Do Tell' (shell pink/white& pink center ) | Do Tell Peony | GP |
| Paeonia 'Duchesse de Nemours' (cream & yellow) | Duchesse de Nemours Peony | GP |
| Paeonia 'Dr.Alexander Flemming'(Dbl.Rich Pink) | Dr.Alexander Flemming Peony | GP |
| Paeonia 'Felix Crousse' (dbl crimson red) | Felix Crousse Peony | GP |
| Paeonia 'Festiva Maxima' (white, black spots) | Festiva Maxima Peony | GP |
| Paeonia 'Gay Paree' (Pink/White) | Gay Paree Peony | GP |
| Paeonia 'Kansas' (dbl. clear red ) | Kanasas Peony | GP |
| Paeonia 'Karl Rosenfield' (dbl velvety crimson) | Karl Rosenfield Peony | GP |
| Paeonia 'Memorial Day' (Dbl.Rose Pink) | Memorial Day Peony | GP |
| Paeonia 'Mons Jules Elie' (Dbl.deep pink) | Mons Jules Elie Peony | GP |
| Paeonia 'Myrtle Gentry' (Dbl.rosey white) | Myrtle Gentry Peony | GP |
| Paeonia 'Pink Cameo' (dbl pink) | Pink Cameo Peony | GP |
| Paeonia 'Primevere' (dbl creamy white) | Primevere Peony | GP |
| Paeonia 'Red Charm' (Dbl.red) | Red Charm Peony | GP |
| Paeonia 'Sarah Bernhardt' (dbl pink) | Sarah Bernhardt Peony | GP |
| Paeonia 'Shirley Temple' (dbl bluish pink to white) | Shirley Temple Peony | GP |
| Paeonia 'Sorbet' (dbl layered pink & white ) | Sorbet Peony | GP |
| Paeonia 'Top Brass'(cream/yellow) | Top Brass Peony | GP |
| Paeonia lacitiflora 'Dai Jo Kukan' (deep pink) | Dai Jo Kukan Single Peony | GP |
| Paeonia lacitiflora 'Honey Gold' (creamy white) | Honey Gold Single Peony | GP |
| Paeonia lacitiflora 'Mischief' (single pink) | Mischief Single Peony | GP |
| Paeonia lacitiflora 'Nippon Beauty' (deep red) | Nippon Beauty Single Peony | GP |
| Paeonia lacitiflora 'Okinawa' (yellow/pink) | Okinawa Single Peony | GP |
| Paeonia lacitiflora 'Raspberry Sundae' (pink/yellow) | Raspberry Sundae Single Peony | GP |
| Paeonia lacitiflora 'Romance' (fading pink) | Romance Single Peony | GP |
| Paeonia officinalis 'Rosea Plena' (dbl. pink) | Rosea Plena Peony | GP |
| Paeonia officinalis 'Rubra Plena' (dbl.red) | Rubra Plena Peony | GP |
| Paeonia suffruticosa 'Hanakisoi' (semi-dbl pink) | Hanakisoi Tree Peony | GP |
| Paeonia suffruticosa 'High Noon' (dbl. yellow) | High Noon Tree Peony | GP |
| Paeonia suffruticosa 'Hoki' (dbl red) | Hoki Tree Peony | GP |
| Paeonia suffruticosa 'Hu Hong' (magenta) | Hu Hong Tree Peony | GP |
| Paeonia suffruticosa 'Kamatanisiki' (blue) | Kamatanisiki Tree Peony | GP |
| Paeonia suffruticosa 'Kinkaku' (dbl orange) | Kinkaku Tree Peony | GP |
| Paeonia suffruticosa 'Kinshi' (dbl lemon yellow) | Kinshi Tree Peony | GP |
| Paeonia suffruticosa 'Kokuryu-Nishiki' (Purple red) | Kokuryu-Nishiki Tree Peony | GP |
| Paeonia suffruticosa 'Sahohime' (dbl white) | Sahohime Tree Peony | GP |
| Paeonia suffruticosa 'Shimanishiki' (dbl rose-red & white) | Shimanishiki Tree Peony | GP |
| Paeonia suffruticosa 'Shima Daijin'( purple) | Shima Daijin Tree Peony | GP |
| Paeonia suffruticosa 'Yagumo' (semi-dbl purple-red) | Yagumo Tree Peony | GP |
| Paeonia tenuifolia | Frenleaf Peony | GP |
| Papaver alpinum | Alpine Poppy | RG |
| Papaver croceum | Artic Poppy | XP |
| Papaver croceum 'Summer Breeze Orange' | Gold/orange Poppy | XP |
| Papaver miyabeanum 'Pacino' | Japanese Poppy | XP |
| Papaver nudicaule 'Champagne Bubbles' | Champagne Bubbles Iceland Poppy | RG |
| Papaver nudicaule 'Wonderland Mix' | Wonderland Mix Iceland Poppy | RG |
| Papaver nudicaule 'Garden Gnome' | Garden Gnome Iceland Poppy | RG |
| Papaver nudicaule 'Summer Breeze' | Summer Breeze Iceland Poppy | XP |
| Papaver orientale 'Allegro' (Bright red) | Allegro Oriental Poppy | XP |
| Papaver orientale 'Beauty of Livermere' (deep red) | Beauty of Livermere Oriental Poppy | XP |
| Papaver orientale 'Brillant' (scarlet orange) | Brillant Oriental Poppy | XP |
| Papaver orientale 'Curlilocks' (ruffled orange red) | Curlilocks Oriental Poppy | XP |
| Papaver orientale 'Dbl.Pleasure' (Bright pink) | Double Pleasure Oreintal Poppy | XP |
| Papaver orientale 'Effendi' (Orange pink) | Effendi Oreintal Poppy | XP |
| Papaver orientale 'Fancy Feathers' (Fringed salmon) | Fancy Feathers Oriental Poppy | XP |
| Papaver orientale 'Flamenco Dancer' (Fringed red) | Flamenco Dancer Oreintal Poppy | XP |
| Papaver orientale 'Harlem' (burgundy) | Harlem Oreintal Poppy | XP |
| Papaver orientale 'Little Candy Floss (Soft pink-Black) | Dwarf Orientale Poppy | XP |
| Papaver orientale 'Manhattan' (Lavender pink) | Manhattan Orientale Poppy | XP |
| Papaver orientale 'Marlene' (Wine red) | Marlene Orientale Poppy | XP |
| Papaver orientale 'Patty's Plum' (smokey plum) | Patty's Plum Oriental Poppy | XP |
| Papaver orientale 'Pink Ruffles' (fringed pink) | Pink Ruffles Orientale Poppy | XP |
| Papaver orientale 'Pink Ruffles' (fringed pink) | Pink Ruffles Orientale Poppy | XP |
| Papaver orientale 'Place Pigalle' (salmon) | Place Pigalle Orientale Poppy | XP |
| Papaver orientale 'Prince of Orange' (orange) | Prince of Orange Orientale Poppy | XP |
| Papaver orientale 'Princess Victoria Louise' (pale pink) | Princess Victoria Louise Orin.Poppy | XP |
| Papaver orientale 'Pizzacato' (mixed colors) | Pizzacato Oriental Poppy | XP |
| Papaver orientale 'Queen Alexander' (salmon-pink) | Queen Alexander Orientale Poppy | XP |
| Papaver orientale 'Scarlet O'Hara' (scarlet) | Scarlet O'Hara Oriental Poppy | XP |
| Papaver orientale 'Turkenlouis' (fringed red) | Turkenlouis Orientale Poppy | XP |
| Papaver orientale 'Watermelon' (red) | Watermelon Orientale Poppy | XP |
| Papaver pilosum (rupifragum) | Orange Spanish Poppy | XP |
| Papaver pilosum 'Flore Pleno' | Double Spanish Poppy | XP |
| Papaver rupifragum 'Dbl.Tangerine Gem' | Double Spanish Poppy | XP |
| Papaver somniferum 'Lauren's Grape' | Purple Breadseed Poppy | XP |
| Papaver triniifolium | Armenian Poppy | XP |
| Pardancanda norrisii | Candylily | GP |
| Pardancanda x 'Sangria' | Sangria Blackberrylily | GP |
| Paronychia kapela v. serpyllifolia | Silver Paronychia/Nailwort | XGC |
| Passiflora incarnata 'Deep Blue' | Hardy Passionflower | GP |
| Paxistima canbyi P.S. | Mountain Lover / Oregon Boxwood | SP/SHRUB |
| Pelargonium endlicherianum | Trukish Geranium | TP |
| Penstemon alpinus | Alpine Penstemon | XP |
| Penstemon baccharifolius | Baccharisleaf Beardtongue | XP |
| Penstemon barbatus 'Bashful Salmon' | Bashful Salmon Penstemon | XP |
| Penstemon barbatus 'Coral Baby' | Coral Baby Penstemon | XP |
| Penstemon barbatus 'Elfin Pink' | Elfin Pink Penstemon | XP |
| Penstemon barbatus 'Rondo' (mixed colors) | Rondo Dwarf Penstemon | XP |
| Penstemon barbatus 'Scarlet Bugler' | Scarlet Bugler Penstemon | XP |
| Penstemon barbatus 'Schooley's Coral' HCG | Coral Beardtongue | XP |
| Penstemon barbatus 'Violet Mesa' TG intro | Violet Mesa Penstemon | XP |
| Penstemon caespitosus 'Claude Barr' | Claude Barr Mat Penstemon | RG |
| Penstemon californicus | Claifornia Beardtongue | XP |
| Penstemon cardinalis | Cardinal Penstemon | XP |
| Penstemon cinicola | Ash Beardtongue | XP |
| Penstemon clutei | Sunset Crater Penstemon | XP |
| Penstemon confertus | Yellow Penstemon | XP |
| Penstemon cyanthus | Wasatch Penstemon | XP |
| Penstemon digitalis 'Dark Towers' | Dark Towers Penstemon | GP |
| Penstemon digitalis 'Husker Red' | Husker Red Penstemon | GP |
| Penstemon digitalis 'Mystica' | Mystica Penstemon | GP |
| Penstemon eatonii 'Richfield' | Richfield Firecracker Penstemon | XP |
| Penstemon glaber | Sawsepal Penstemon | RG |
| Penstemon gloxinoides 'Firebird' (Schonholzeri) | Shelleaf Penstemon | XP |
| Penstemon grandiflorus | Firebird Penstemon | XP |
| Penstemon grandiflorus 'Prairie Jewel' P.S. | Prairie Jewel Penstemon | XP |
| Penstemon grandiflorus 'Prairie Splendor' | Prairie Splendor Penstemon | XP |
| Penstemon grandiflorus 'War Axe' (05 Great Plants) | Pink/Maroon/Red/Purple | XP |
| Penstemon heterophyllus 'Blue Springs' | Blue Springs Beardtongue | XP |
| Penstemon heterophyllus 'Zuriblau' | Zuriblau Beardtongue | XP |
| Penstemon hirsutus v. pygmaeus | Dwarf Hairy Penstemon | XP |
| Penstemon hirsutus v. pygmaeus f. albus | Dwarf White Hairy Penstemon | RG |
| Penstemon linarioides | Mat Penstemon | XP |
| Penstemon linarioides v. coloradoensis 'Silverton' P.S. | Silverton Bluemat Penstemon | XP |
| Penstemon mensarum | Grand Mesa Penstemon | XP |
| Penstemon nitidus | Blue Wax-Leaved Penstemon | XP |
| Penstemon palmeri | Palmer's/ Wild Snapdragon Penstemon | XP |
| Penstemon pinifolius 'Compactum' | Red Pineleaf Penstemon | XP |
| Penstemon pinifolius 'Mersea Yellow' | Mersea Yellow Pineleaf Penstemon | XP |
| Penstemon pinifolius 'Nearly Red' HCG intro | Nearly Red Pineleaf Penstemon | XP |
| Penstemon pinifolius 'Shades of Mango' | Pine Leaf Penstemon | XP |
| Penstemon pseudospectabilis | Desert Beardtongue | XP |
| Penstemon richardsonii | Richardson's Penstemon | XP |
| Penstemon rostriflorus (bridgesii) P.S. | Bridge's Penstemon | XP |
| Penstemon 'Rubicunda' | Rubicunda Penstemon | TP/XP |
| Penstemon serrulatus 'Albus' | White Penstemon | GP |
| Penstemon smallii | Small's Beardtongue | XP |
| Penstemon strictus | Rocky Mountain Penstemon | XP |
| Penstemon superbus | Superb Penstemon | XP |
| Penstemon X (mexicali) 'Timberline Garnet' TG intro | Timberline Garnet Penstemon | XP |
| Penstemon X (mexicali) 'Pike's Peak Purple' P.S. | Pike's Peak Purple' Penstemon | XP |
| Penstemon X (mexicali) 'Red Rocks' P.S. | Red Rocks' Penstemon | XP |
| Penstemon X (mexicali) 'Psmyers' P.S. | Shadow Mountain' Penstemon | XP |
| Penstemon X 'Blue Lips' HCG intro | Blue Lips Penstemon | XP |
| Penstemon X 'Petite Bouquet' | Petite Bouquet Penstemon | XP |
| Perovskia atriplicifolia | Russian Sage | XP |
| Perovskia atriplicifolia 'Little Spire' | Little Spire Russian Sage | XP |
| Perovskia X 'Filigran' | Russian Sage | XP |
| Perovskia X 'Longin' | Longin Russian Sage | XP |
| Persicaria affinis 'Dimity' | Himalayan Border Jewel/ Fleece Flower | XGC |
| Persicaria amplexicaule 'Speciosa' | Golden Arrow Knotweed/Fleece Flower | SP |
| Persicaria amplexicaulis 'Firetail' | Firetail Knotweed/Fleece Flower | SP |
| Persicaria amplexicaulis 'Blackfield' | Blackfield Knotweed/Fleece Flower | SP |
| Persicaria amplexicaulis 'Pink Elephant' | Pink Elephant Knotweed/Fleece Flower | SP |
| Persicaria amplexicaulis 'Rosea' | Pink Knotweed/Fleece Flower | SP |
| Persicaria microcephala 'Red Dragon' | Red Dragon Knotweed | SP |
| Persicaria polymorpha | Giant Knotweed/Fleece Flower | SP |
| Petrorhagia saxifragia 'Lady Marie' (Tunica) | Lady Marie Tunic Flower | RG |
| Phemeranthus calycinum (Talinum) | Flame Flower | RG |
| Phlomis alpina | Alpine Jerusalem Sage | GP |
| Phlomis cashmeriana P.S. | Cashmier Jerusalem Sage | GP |
| Phlomis russeliana | Yellow Jerusalem Sage | GP |
| Phlox bifida 'Betty Blake' | Betty Blake Sand Phlox | GC |
| Phlox carolina 'Miss Lindgard' | Fragrant White Phlox | GP |
| Phlox carolina 'Miss Lindgard' | Fragrant White Phlox | GP |
| Phlox carolina 'Miss Lindgard' | Fragrant White Phlox | GP |
| Phlox carolina 'Magnificence' | Fragrant Pink Phlox | GP |
| Phlox divaricata 'Chatahoocee' (blue/purple) | Woodland Phlox | GC |
| Phlox douglasii 'Cracker Jack' | Crackerjack Moss Phlox | GC |
| Phlox kelseyi 'Lemhi Gem' | Lemhi Gem Creeping Phlox | GC |
| Phlox paniculata 'Flower Power' (Creamy pink) | Flower Power Tall Garden Pholx | GP |
| Phlox paniculata 'David' (Fragrant white) | David Tall Garden Phlox | GP |
| Phlox paniculata 'David's Lavender' (Lav./pink) | David's Lavender Tall Garden Phlox | GP |
| Phlos paniculata 'Delilah' (red-purple) | Delilah Tall Garden Phlox | GP |
| Phlox paniculata 'Dusterlohe' (violet/lavender) | Dusterlohe Tall Garden Phlox | GP |
| Phlox paniculata ;Junior Dream (purple) | Junior Dream Tall Garden Phlox | GP |
| Phlox paniculata 'Coral Flame' | CoralFlame Tall Garden Phlox | GP |
| Phlox paniculata 'Purple Flame' | Purple Flame Tall Garden Phlox | GP |
| Phlox paniculata 'Nicky' (Deep purple) | Nicky Tall Garden Phlox | GP |
| Phlox paniculata 'Pink Flame' (pink) | Pink Flame Tall Garden Phlox | GP |
| Phlox paniculata 'Red Riding Hood (red) | Red Riding Hood Dwf. Garden Phlox | GP |
| Phlox stolonifera 'Blue Ridge' (lrg. Blue flower) | Blue Ridge Creeping Phlox | GC |
| Phlox stolonifera 'Home Fires' | Home Fires Creeping Phlox | GC |
| Phlox stolonifera 'Pink Ridge' (lrg.pink flower) | Pink Ridge Creeping Phlox | GC |
| Phlox subulata 'Appleblossom' ( white) | Appleblossom Creeping Phlox | GC |
| Phlox subulata 'Candy Stripe' (pink/white) | Candy Stripe Creeping Phlox | GC |
| Phlox subulata 'Cotton Candy' (lt.pink/deep pink) | Cotton Candy Creeping Phlox | GC |
| Phlox subulata 'Drummon's Pink' (Medium pink) | Drummond's Pink Creeping Phlox | GC |
| Phlox subulata 'Emerald Blue' (light blue) | Emerald Blue Creeping Phlox | GC |
| Phlox subulata 'Emerald Pink' (Light pink) | Emerald Pink Creeping Phlox | GC |
| Phlox subulata 'Laura' (Soft pink) | Laura's Creeping Phlox | GC |
| Phlox subulata 'McDaniels Cushion' (rose pink) | Mcdaniels Creeping Phlox | GC |
| Phlox subulata 'Oakington Blue Eyes' (light/dark blue) | Oakington Blue Eyes Creeping Phlox | GC |
| Phlox subulata 'Red Wings' (red) | Red Wings Creeping Phlox | GC |
| Phlox subulata 'White Out' (snow white) | White Out Creeping Phlox | GC |
| Phuopsis stylosa | Creeping Crosswort | GC |
| Phygelius X rectus 'Cherry Ripe' | Red Cape Fuchsia | GP |
| Physalis alkekegi 'Gigantea' | Chinese Lantern | GP |
| Physostegia virginiana 'Crown of Snow' | Crown of Snow Obedient Plant | GP |
| Physostegia virginiana 'Rose Queen' | Rose Queen Obedient Plant | GP |
| Physostegia virginiana 'Red Beauty' | Red Beauty Obedient Plant | GP |
| Platycodon grandiflorus 'Hakone Blue' | Blue Baloon Flower | GP |
| Platycodon grandiflorus 'Hakone White' | White Baloon Flower | GP |
| Platycodon grandiflorus 'Mariesii' | Mariesii Balloon Flower | GP |
| Polemonium boreale 'Heavenly Habit' | Heavenly Habit Jacob's Ladder | SP |
| Polemonium carneum 'Apricot Delight' | Apricot Delight Jacob's Ladder | SP |
| Polemonium carneum 'Apricot Delight' | Variegated Jacob's Ladder | SP |
| Polemonium caruleum 'Bressingham Purple' | Bressingham Purple Jacob's Ladder | SP |
| Polemonium reptans 'Stairway to Heaven' | Variegated Jacob's Ladder | SP |
| Polemonium reptans 'Touch of Class' | Touch of Class Jacob's Ladder | SP |
| Polygonatum multiflorum 'Variegatum' | Variegated Soloman's Seal | SP |
| Potentilla megalantha | Wooly Cinquefoil | GC |
| Potentilla nepalensis 'Ron McBeath' | Ron McBeath Potentilla | GC |
| Potentilla neumanniana 'Nana' | Spring Cinquefoil | GC |
| Primula allionii 'Lismore Jewel' | Lismore Jewel Alpine Primrose | SP |
| Primula auricula | Auricula / European Alpine Primrose | SP |
| Primula auricula 'Emily P' | Emily P. Auricula Primrose | SP |
| Primula bullesiana | Candelabra Primrose | SP |
| Primula Candelabra Hybrid | Candelabra Hybrid Primrose | SP |
| Primula capitata 'Salvana' | Salvana Primrose | SP |
| Primula denticulata 'Blues Selection' | Blues Select. Drumstick Primrose | SP |
| Primula denticulata 'Mix' | Drumstick Primrose | SP |
| Primula japonica 'Mix' | Japanese Primrose | SP |
| Primula veris | Cowslip/ Primrose | SP |
| Primula viallii 'Miracle' | Poker Primrose | SP |
| Primula vulgaris 'Butter Yellow' | Butter Yellow Primrose | SP |
| Primula vulgaris 'Nectarine' | Nectarine Primrose | SP |
| Primula X 'Wanda Mix' | Wanda Primrose | SP |
| Prunella grandiflora 'Alba' | White Self Heal | GC |
| Prunella grandiflora 'Loveliness Blue' | Blue Self Heal | GC |
| Prunella grandiflora 'Bella Deep Rose' | Pink Self Heal | GC |
| Prunella grandiflora 'Bella Deep Rose' | Pink Self Heal | GC |
| Prunella x 'Summer Daze' | Pink Self Heal | GC |
| Pulmonaria saccharata 'Mrs. Moon' | Mrs. Moon Lungwort | SP |
| Pulmonaria saccharata 'Roy Davidson' | Roy Davidson Bethlehem Sage/Lungwort | SP |
| Pulsatilla patens | American Pasque Flower | RG |
| Pulsatilla vulgaris 'Alba' | White Pasque Flower | RG |
| Pulsatilla vulgaris 'Blaue Glocke' | Blue Bell Pasque Flower | RG |
| Pulsatilla vulgaris 'Heiler Hybrid' | Heiler Hyb. Pasque Flower | RG |
| Pulsatilla vulgaris 'Red Glocke' | Red Bell European Pasque Flower | RG |
| Pulsatilla vulgaris 'Rubra' | Red Bell European Pasque Flower | RG |
| Pulsatilla vulgaris 'Papageno' | Papageno European Pasque Flower | RG |
| Raoulia australis | New Zealand Scab Plant | RG |
| Ratibida columnifera (pulcherrima) | Red Mexican Hat | XP |
| Ratibida columnifera | Yellow Mexican Hat | XP |
| Rheum palmatum 'Atrosanguineus' | Atrosanguineus Orn. Rhubarb | SP/GP |
| Rheum palmatum v. tanguticum | Ornamental Rhubarb | SP/GP |
| Rheum rhabarbarum 'Crimson Red' | Crimson Red Edible Rhubarb | SP/GP |
| Rheum rhabarbarum 'Heirloom' | Giant Heirloom Edible Rhubarb | SP/GP |
| Rheum rhabarbarum 'Valentine' | Valentine Edible Rhubarb | SP/GP |
| Rheum X 'Ace of Hearts' | Ace of Hearts Orn. Rhubarb | SP/GP |
| Rosa 'Mini Red Cascade' | Mini Red Cascade Rose | SHURB |
| Rosa 'Mini Red Cascade' | Hiawatha Rose | SHURB |
| Rosa 'Pink Cloud' | Pink Cloud Rose | SHURB |
| Rosa 'Sweet Chariot' | Sweet Chariot Cascading Rose | SHURB |
| Rosa 'Trinity' | Trinity Rose | SHURB |
| Rosa 'Wichurana' | Wichurana Rose | SHURB |
| Rosmarinus officinalis 'Arp' (Hardy) | Arp Hardy Rosemary | HERB |
| Rosmarinus officinalis 'Madeline Hill' (Hardiest) | Madeline Hill Hardy Rosemary | HERB |
| Rosularia muratdaghensis | Rosularia | RG |
| Rosularia chrysantha | Rosularia | RG |
| Rudbeckia fulgida 'Goldsturm' | Goldsturm Black Eyed Susan | GP |
| Rudbeckia gloriosa 'Double Gold' | Double Gold Black Eyed Susan | GP |
| Rudbeckia hirta 'Autumn Colors' | Autumn Colors Black Eyed Susan | GP |
| Rudbeckia hirta 'Cherokee Sunset' | Cherokee Sunset Blk.Eyed Susan | GP |
| Rudbeckia hirta 'Cherry Brandy' | Cherry Brandy | GP |
| Rudbeckia hirta 'Denver Daisy' P.S. | Denver Daisy Black Eyed Susan | GP |
| Rudbeckia hirta 'Goldilocks' | Black Eyed Susan | GP |
| Rudbeckia hirta 'Green Wizard' | Black Eyed Susan | GP |
| Rudbeckia hirta 'Indian Summer' | Indian Summer Black Eyed Susan | GP |
| Rudbeckia hirta 'Marmalade' | Black Eyed Susan | GP |
| Rudbeckia hirta 'Prairie Sun' | Prairie Sun Black Eyed Susan | GP |
| Rudbeckia hirta 'Sonora' | Black Eyed Susan | GP |
| Rudbeckia hirta 'Toto Mix' | Compact Black Eyed Susan | GP |
| Rudbeckia maxima | Prairie Coneflower | GP |
| Rudbeckia occidentalis 'Black Beauty' | Black Beauty Rudbeckia | GP |
| Rudbeckia speciosa 'Viette's Little Suzy' | Little Suzy Dwarf Black Eyed Susan | XP |
| Rudbeckia subtomentosa 'Henry Eilers' | Henry Eilers Sweet Coneflower | GP |
| Rudbeckia triloba | Three Leaved Black Eyed Susan | XP |
| Ruellia humilis | Wild Petunia | XGC |
| Rumex sanguineus | Bloody Sorrel | GP |
| Ruschia pulvinaris | Shrubby Iceplant | RG |
| Ruschia putterelii | Shrubby Iceplant | RG |
| Ruta graveolens 'Blue Mound' | Rue | XP |
| Sagina subulata | Irish Moss | RG |
| Sagina subulata 'Aurea' | Scotch Moss | RG |
| Salvia argentea P.S. | Giant Silver Sage | XP |
| Salvia azurea 'Grandiflora' | Azure / Pitcher Salvia | XP |
| Salvia azurea ssp. Pitcherii 'Nekan' | Nekan Pitcher Salvia | XP |
| Salvia daghestanica P.S. | Platinum Sage | XP |
| Salvia darcyi 'Pscarl' P.S. | Vermillion Bluffs Mexican Sage | XP |
| Salvia dorrii HCG | Desert Purple Sage | XP |
| Salvia forskaohlei | Turkish Sage | XP |
| Salvia microphylla hyb. 'Grenadine' | Grenadine Texas Sage | XP |
| Salvia greggii 'Furman's Red' P.S. | Furman's Red Texas Sage | TP/ XP |
| Salvia microphylla hyb. 'Raspberry Delight' (hardiest) | Raspberry Delight Texas Sage | XP |
| Salvia microphylla 'Wild Thing' P.S. | Wild Thing Texas Sage | XP |
| Salvia greggii 'Ultra Violet' HCG intro | Ultra Violet Texas Sage | TP/ XP |
| Salvia jurisicii | Upside Down/Yugoslavian Sage | XP |
| Salvia lyrata 'Purple Knockout' | Purple Knockout Lyre Leaf Sage | GP |
| Salvia nemorosa 'Blue Hill' | Blue Hills Meadow Sage | GP |
| Salvia nemorosa 'Caradonna' | Erect stems, Blue/Violet Flowers | GP |
| Salvia nemorosa 'Lubecca' | Violet Blue Meadow Sage | GP |
| Salvia nemorosa 'Marcus' | Blue Meadow Sage | GP |
| Salvia nemorosa 'May Night' | May Night Meadow Sage | GP |
| Salvia nemorosa 'Plumosa' | Pink/Purple | GP |
| Salvia nemorosa 'Sensation Rose' (rose pink) | Sensation Rose Sage | GP |
| Salvia nemorosa 'Snow Hill' | White Meadow Sage | GP |
| Salvia officinalis 'Berggarten' | Culinary Berggarten Sage | XP |
| Salvia officinalis 'Icterina' | Culinary Icterina Sage | XP |
| Salvia officinalis 'Minima' | Dwarf Culinary Sage | XP |
| Salvia officinalis 'Purpureus' | Culinary Purple Sage | XP |
| Salvia officinalis 'Sage of Bath' | Sage of Bath Sage | XP |
| Salvia officinalis 'Tricolor' | Culinary Tricolor Sage | XP |
| Salvia pachyphylla P.S. | Mojave Sage | XP |
| Salvia pachyphylla 'Blue Flame' HCG intro | Blue Flame Mojave Sage | XP |
| Salvia penstemonoides | Penstemon Sage | XP |
| Salvia pitcheri 'Grandiflora' | Pitcher's Sage | XP |
| Salvia reptans 'West Texas Form' HCG | Texas Grass Sage | XP |
| Salvia sclarea 'Vatican White' | White Meadow Sage | XP |
| Salvia sylvestris 'Royal Crimson Distinction' | Woodland Sage | GP |
| Salvia trannslyvanica 'Blue Spires' | Blue Spires Salvia | XP |
| Salvia verticillata 'Purple Rain' | Purple Rain Sage | XP |
| Salvia verticillata 'Purple Rain' | Eveline Sage | GP |
| Salvia verticillata 'Lilac Sage' | Lilac Sage | |
| Salvia X 'Scarlet Spires' HCG | Hybrid Sage | TXP |
| Santolina chamaecyparissus 'Nana' | Dwarf Lavender Cotton | XP |
| Santolina rosmarinifolia | Green Lavender Cotton | XP |
| Saponaria lempergii 'Max Frei' | Max Frei German Soapwort | GC |
| Saponaria ocymoides | Soapwort | GC |
| Saponaria ocymoides 'Snow Tip' | Snow Tip Soapwort | GC |
| Saponaria X 'Oliviana' | Oliviana Soapwort | GC |
| Saxifraga moschata 'Peter Pan' | Mossy Saxifragege | RG |
| Saxifraga paniculata ssp. Brevifolia | Silver Saxifrage | RG |
| Saxifraga 'Mossy sp. Mix' | Mossy Saxifragege | RG |
| Saxifraga x anglica 'Cranbourne' | Cranbourne Saxifrage | RG |
| Saxifraga x arendsii 'Triumph' | Triumph Mossy Saxifrage | RG |
| Saxifraga x apiculata (s.mariginata/s. sancta) | Saxifrage | RG |
| Saxifraga x gaudinii 'Apple Blossom' | Apple Blossom Silver Saxifrage | RG |
| Saxifraga x 'White Hill' | Silver Saxifrage | RG |
| Scabiosa argentea | Scabiosa | XP |
| Scabiosa caucasica 'Compliment' | Compliment Scabiosa | GP |
| Scabiosa caucasica 'Fama' | Fama Scabiosa | GP |
| Scabiosa columbaria f.nana 'Pinchusion Blue' | Pinchusion Blue Scabiosa | GP |
| Scabiosa columbaria f.nana 'Pinchusion Pink' | Pinchusion Pink Scabiosa | GP |
| Scabiosa superba 'Mongolian Mist' | Mongolian Mist Pincushion Flower | GP |
| Scabiosa columbaria 'Butterfly Blue' | Butterfly Blue Pincushion Flower | GP |
| Scleranthus biflorus | New Zealand Moss | RG |
| Scleranthus uniflorus | Knawel / Scleranthus | RG |
| Scrophularia macrantha P.S. | Red Birds in a Tree | XP |
| Scutellaria alpina 'Moonbeam' | Moonbeam Skullcap | XP |
| Scutellaria baicalensis | Siberian Skullcap | XP |
| Scutellaria pontica | Turkish Skullcap | XP |
| Scutellaria resinosa | Chinese Skullcap | XP |
| Scutellaria resinosa 'Smoky Hills' | Smoky Hills Skullcap | XP |
| Scutellaria scordifolia 'Mongolian Skies' (Great Plants) | Mongolian Skies Skullcap | XP |
| Scutellaria suffrutescens P.S. | (Annual)Cherry Skullcap | XA |
| Scutellaria X 'Violet Cloud' HCG | Lavender Cloud Skullcap | XP |
| Sedum album | White Flowered Sedum | XGC |
| Sedum acre 'Gold Moss' | Carpet Sedum | XGC |
| Sedum album 'Coral Carpet' | Coral Carpet Sedum | XGC |
| Sedum album 'Murale' | Murale Sedum | XGC |
| Sedum cauticolum 'Lidakense' | Lidakense Stonecrop | XGC |
| Sedum dasyphyllum glaucum | Corsican Sedum | XGC |
| Sedum dasyphyllum 'Himalayan Skies' | Himalayan Skies Sedum | XGC |
| Sedum dasyphyllum major 'Blue Tears' | Blue Tears Stonecrop | XGC |
| Sedum divergens (globusum) | Old Man's Bones Sedum | XGC |
| Sedum ewersii | Ewer's Sedum | XGC |
| Sedum ewersii 'Rosenteppisch' | Rose Carpet Sedum | XGC |
| Sedum forsterianum 'Oracle' | Oracle Stonecrop | XGC |
| Sedum grisbachii | Stonecrop | XGC |
| Sedum hakonense 'Chocolate Ball' | Chocolate Ball Darwf Sedum | XGC |
| Sedum hylotelephium 'Matrona' | Matrona Tall Sedum | XP |
| Sedum kamtschaticum 'The Edge' | Gold Sedum | XP |
| Sedum kamtschaticum 'Variegatum' | Variegated Rosette Sedum | XGC |
| Sedum kamtschaticum 'Weihenst. Gold' | Rosette Sedum | XGC |
| Sedum lanceolatum | Lanceleaf Sedum | XGC |
| Sedum lanceolatum 'Pikes Peak' | Pikes Peak Sedum | XGC |
| Sedum makanoi 'Limelight' | Green Woodland Sedum | TP/GC |
| Sedum makanoi 'Ogon' | Golden Woodland Sedum | TP/GC |
| Sedum makanoi 'Variegata' | Variegata Woodland Sedum | TP/GC |
| Sedum niveum | Davidson's Stonecrop | SGC |
| Sedum obtusifolium | Stoncrop | XGC |
| Sedum oreganum | Jelly Bean Sedum | RG |
| Sedum pachyphylum 'Jelly Bean' | Jelly Bean Sedum | XGC |
| Sedum pachyclados | Pachyclados / Pakistan Sedum | XGC/SGC |
| Sedum populifolium | Poplar-leaved Sedum | XGC |
| Sedum reflexum 'Angelina' | Angelina Golden Sedum | XGC |
| Sedum reflexum 'Blue Spruce' | Blue Spruce Sedum | XGC |
| Sedum reflexum 'Bronze Spruce' | Bronze Spruce Sedum | XGC |
| Sedum reflexum 'Rice Creek' | Rice Creek Sedum | XGC |
| Sedum reflexum 'Christatum' | Crested Sedum | XGC |
| Sedum rupestri | Reflexed Evergreen Stonecrop | XGC |
| Sedum sediforme 'Big Blue' | Big Blue Pale Stonecrop | |
| Sedum sediforme 'Thumper' | Thumper Pale Stonecrop | XGC |
| Sedum seiboldii 'October Daphne' | October Daphne Sedum | XP |
| Sedum seiboldii 'Vera Jameson' | Vera Jameson Sedum | XP |
| Sedum selskianum 'Goldilocks' | Goldilocks Sedum | XGC |
| Sedum selskianum 'Spirit' | Spirit Sedum | XP |
| Sedum sexangular | Watchchain Stonecrop | XGC |
| Sedum spathulfolium 'Cape Blanco' | Cape Blanco Pacific Sedum | XP |
| Sedum spectabile 'Autumn Joy' | Autumn Joy Stonecrop | XP |
| Sedum spectabile 'Brilliant' | Brilliant Tall Stonecrop | XP |
| Sedum spectabile 'Mini Joy' | Mini Joy Stonecrop | XP |
| Sedum spectabile 'Neon' | Neon Stonecrop | XP |
| Sedum spurium 'Bronze Carpet' | Bronze Carpet Sedum | XGC |
| Sedum spurium 'John Creech' | John Creech Sedum | XGC |
| Sedum spurium 'Alba' | Two Row Stonecrop | XGC |
| Sedum spurium 'Tricolor' | Tricolor Sedum | XGC |
| Sedum spurium 'Voodoo' | Voodoo Sedum | XGC |
| Sedum tatarowinii 'Mongolian Stardust' (Great Plants) | Mongolian Stardust Sedum | XP |
| Sedum telephium 'Autumn Delight'(Beka) | Autumn Delight Sedum | XP |
| Sedum telephium 'Novem' | Novem Sedum | XP |
| Sedum telephium 'Picolette' | Picolette Sedum | XP |
| Sedum telephium 'Red Cauli' | Red Cauli Sedum | XP |
| Sedum telephium 'Ringmore Ruby' | Ringmore Ruby Sedum | XP |
| Sedum telephium 'Sunset Cloud' | Sunset Cloud Sedum | RG |
| Sedum telephium 'Xenox' | Xenox Stonecrop | XP |
| Sedum tetractinum 'Coral Reef' | Chinese Coral Reef Sedum | XP |
| Sedum X 'Autumn Charm' | Autumn Charm Stonecrop | XP |
| Sedum X 'Bertram Anderson' | Bertram Anderson Sedum | XP |
| Sedum X 'Bronco' | Bronco Stonecrop | XP |
| Sedum X 'Carl' | Carl Stonecrop | XP |
| Sedum X 'Czar's Gold' | Czar's Gold Carpet Sedum | XGC |
| Sedum x 'Munstead Dark Red' | Munstead Dark Red Sedum | XGC |
| Sedum X 'Postman's Pride' | Postman's Pride Autumn Stonecrop | XP |
| Sedum X 'Purple Emperor' | Purple Emperor Autumn Stonecrop | XP |
| Sempervivum (many assorted varieties) | Hens and Chicks | RG |
| Seseli gummiferum P.S. | Moon Carrot | RB |
| Sideritis taurica | | XP |
| Silene acaulis | Moss Campion | RG |
| Silene lacinata | Mexican Catchfly | XP |
| Silene regia | Showy Catchfly | XP |
| Silene scouleri 'Grandis' | Scouler's Large Campion | XP |
| Silene tatarica | Tartar Catchfly | XP |
| Silphium laciniatum | Compass Plant | GP |
| Sisyrinchium angustifolium | Stout Blue Eyed Grass | RG |
| Sisyrinchium californicum | Yellow Blue-Eyed Grass | A/RG |
| Sisyrinchium idahoense v. bellum | Idaho Blue-Eyed Grass | RG |
| Sisyrinchium macrocarpa | Yellow Blue-Eyed Grass | RG |
| Solidago caesia | Bluestem Goldenrod | GP |
| Solidago 'Dansolitlem' Little Lemon | Dansolitlem Goldenrod | GP |
| Solidago rugosa 'Fireworks' HCG | Fireworks Goldenrod | GP |
| Solidago sp. 'Wichita Mountains' HCG | Wichita Mountains Goldenrod | GP |
| Solidago sphacelata 'Golden Fleece' | Golden Fleece Goldenrod | GP |
| Spartium juceum | Spanish Broom | SHURB |
| Sphaeralcea coccinea | Scarlet Globe Mallow | XP |
| Sphaeralcea 'Desert Sunset' | Red False Mallow | XP |
| Sphaeromeria capitata | Rock Tansy | RG |
| Stachys byzantine | Lamb's Ear | XP |
| Stachys byzantine 'Helene Von Stein' | Helene Von Stein Lamb's Ear | XP |
| Stachys byzantine 'Silver Carpet' | Silver Carpet Lamb's Ear | XP |
| Stachys byzantine 'Silky Fleece' | Silky Fleece Dwarf Lamb's Ears | XP |
| Stachys coccinea | Scarlet Hedge Nettle | XP |
| Stachys coccinea 'Chinook' | Chinook Scarlet Hedge Nettle | XP |
| Stachys coccinea 'Hot Spot Coral' HCG intro | Hot Spor Coral Hedge Nettle | XP |
| Stachys macrantha (grandiflora) 'Superba' | Big Betony | GP |
| Stachys monieri 'Hummelo' | Large clumps, showy purple spikes | GP |
| Stanleya pinnata | Prince's Plume | XP |
| Stokesia laevis 'Blue Star' | Blue Star Stoke's Aster | GP |
| Stokesia laevis 'Blue Mary Gregory' | Mary Gregory Stoke's Aster | GP |
| Stokesia laevis 'Purple Parasols' | Purple Parasols Stoke's Aster | GP |
| Stokesia laevis 'Traumerei' | Stoke's Aster | GP |
| Stokesia laevis 'White' | White Stoke's Aster | GP |
| Stomatium bevfortense | Tiger's Jaws | RG |
| Stomatium mustilinum | Miniature Tiger's Jaws | RG |
| Stomatium patulum | Tiger's Jaws | RG |
| Stomatium squveolens | Tiger's Jaws | RG |
| Symphytum grandiflorum | Ornamental Comfrey | GP |
| Symphytum grandiflorum 'Hidcote Blue' | Hidcote BlueOrn. Comfrey | GP |
| Symphytum grandiflorum 'Hidcote Variegated' | Hidcote Variegated Orn. Comfrey | GP |
| Tanacetum densum amani (Chrysanthemum) | Partridge Feather | XP |
| Tanacetum niveum | Snow Daisy | XP |
| Tanacetum parthenium 'Aureum' | Golden Feverfew | XP |
| Tanacetum 'Robinson Red' | Red Painted Daisy | GP |
| Tanacetum 'Robinson Rose' | Pink Painted Daisy | GP |
| Tanacetum vulgare 'Isla Gold' | Golden Leaf Tansy | GP |
| Teucrium aroanum HCG | Greek / Creeping Germander | RG |
| Teucrium chamaedrys 'Spring Gold' | Spring Gold Shrubby Germander | RG |
| Teucrium chamaedrys 'Homestead' | Shrubby / Wall Germander | RG |
| Teucrium hyrcanicum 'Purple Tails' | Speedwell Germander | XP |
| Teucrium orientale | Oriental Germander | XP |
| Teucrium pyrenaicum | Pyrenese Germander | XP |
| Thalictrum aquilegifolium | Lavender Meadow Rue | SP |
| Thalictrum aquilegifolium 'Purpureum' | Purple Meadow Rue | SP |
| Thalictrum x 'Splendide' | Splendid Meadow Rue | SP |
| Thalictrum flavum 'Glaucum' | Yellow Meadow Rue | SP |
| Thalictrum rochebrunianum 'Lavender Mist' | Lavender Mist Meadow Rue | SP |
| Thermopsis caroliniana | Carolina Thermopsis | GP |
| Thermopsis fabacea | Himalayan Thermopsis | XP |
| Thermopsis lanceolata HCG | Golden Banner Thermopsis | GP |
| Thymus juniperifolia | Juniper Thyme | RG |
| Thymus caespititius 'Tuffet' | Tuffet Thyme | GC |
| Thymus citriodorus 'Aureus' | Variegated Golden Lemon Thyme | RG |
| Thymus citriodorus 'Doone Valley' | Doone Valley Thyme | GC |
| Thymus citriodorus 'Lime' | Lime Thyme | RG |
| Thymus neceffii | Juniper Leaf Thyme | RG |
| Thymus praecox 'Albiflorus' | White Mother of Thyme | GC |
| Thymus praecox 'Coccineus' | Red Mother of Thyme | GC |
| Thymus praecox 'Highland Cream' | Variegated Thyme | GC |
| Thymus praecox 'Pink Chintz' | Pink Chintz Thyme | GC |
| Thymus pseudolanuginosis | Woolly Thyme | XGC |
| Thymus 'Sagram' | Sagram Thyme | XGC |
| Thymus serphyllum 'Doretta Klaber' | Doretta Klaber Thyme | GC |
| Thymus serpyllum 'Creeping Lemon' | Creeping Lemon Thyme | GC |
| Thymus serpyllum 'Elfin' | Elfin Thyme | GC |
| Thymus serpyllum 'Magic Carpet' | Magic Carpet Thyme | GC |
| Thymus vulgaris 'Archers Gold' | Golden Thyme | RG |
| Thymus vulgaris 'Silver Posie' | Silver Thyme | RG |
| Thymus X Reiter | Reiter Creeping Thyme | XGC |
| Tairella 'Black Snowflake' | Black Snowflake Foam Flower | SP |
| Tiarella wherryi | Foam Flower | SP |
| Tradescantia 'Blue & Gold' | Blue & Gold Spiderwort | SP |
| Tradescantia x 'Concord Grape' | Concord Grape Spiderwort | SP |
| Tricyrtis hirta 'Variegata' | Variegated Toad Lily Z6 | SP |
| Tricyrtis hirta X 'Mayazaki' | Hybrid Toad Lily Z6 | SP |
| Trifolium repens 'Purpurascens Quadrifolium' | Purple Four-Leafed Clover | RG |
| Trifolium repens 'Dragon's Blood' | Silver/Purple/Green Clover | RG |
| Trollius chinensis 'Golden Queen' | Golden Queen Globe Flower | SP |
| Trollius X 'Orange Crest' | Prichard's Giant Globe Flower | SP |
| Trollius X 'Prichard's Giant' | Orange Crest Globe Flower | SP |
| Trollius X (cultorum) 'Alabaster' | Alabaster Globe Flower | SP |
| Valeriana officinalis | Valerian | GP |
| Verbascum chaixii f.album 'Wedding Candles' | Wedding Candles Mullein | GP |
| Verbascum 'Polar Summer' | Ploar Summer Mullein | GP |
| Verbascum 'Southern Charm' | Southern Charm Mullein | GP |
| Verbascum 'Violetta' | Violet Mullein | GP |
| Verbena bipinnatifida | KG Dakota Verbena | RG/XP |
| Verbena canadensis 'Homestead Purple' | Homestead Purple Verbena | TP |
| Verbena lilacina 'De la Mina' | De la Mina Lilac Verbena | TP |
| Verbena peruviana 'Red Devil' | Hardy Red Verbena | XGC |
| Verbena stricta 'Prairie Candles' | Hoary Vervain | GP |
| Verbena X 'Annie' HCG | Pink/Purple Verbena | XP |
| Vernonia fasciculata | Smooth Ironweed | GP |
| Vernonia noveboracensis | New York Ironweed | GP |
| Veronica 'Minuet' | Veronica | GP |
| Veronica austriaca ssp. teucrium 'Crater Lake Blue' | Crater Lake Blue Veronica | GP |
| Veronica austriaca 'Trehane' | Trehane Speedwell | GP |
| Veronica cinerea | Gray/Silver Wooly Speedwell | GP |
| Veronica filiformis | Bird's Eye Veronica | GC |
| Veronica incana | Silver Speedwell | XP |
| Veronica liwanensis P.S. | Turkish Veronica | XGC |
| Veronica longifolia 'Eveline' (true pink) | Eveline Veronica/Speedwell | GP |
| Veronica oltensis | Thyme-Leaf Veronica | GC |
| Veronica pectinata | Blue Woolly Veronica | XGC |
| Veronica pectinata 'Rosea' | Pink Woolly Veronica | XGC |
| Veronica peduncularis 'Georgia Blue' | Georgia Blue Veronica | GC |
| Veronica prostrata 'Little Joey' | Creeping Veronica | GC |
| Veronica prostrata 'Nestor' | Creeping Veronica | GC |
| Veronica reavis 'Crystal River' P.S. | Crystal River Veronica | GC |
| Veronica repens (prostrata)'Goldwell' | Golden Creeping Veronica | GC |
| Veronica repens 'Sunshine' | Sunshine Creeping Veronica | GC |
| Veronica satureioides | Veronica | GC |
| Veronica spicata 'Giles van Hees' | Giles van Hees Veronica | GP |
| Veronica spicata 'Goodness Grows' | Goodness Grows Veronica | GP |
| Veronica spicata 'Lilac Karina' | Lilac Karina Veronica | GP |
| Veronica spicata 'Red Fox' | Red Fox Veronica | GP |
| Veronica spicata 'Royal Candles' | Royal Candles Veronica | GP |
| Veronica spicata 'Tickled Pink'' | Tickled Pink Veronica | GP |
| Veronica spicata ssp. incana | Silver-Leaf Veronica | XP |
| Veronica tauricola | Xeric Turkish Veronica | XGC |
| Veronica thymoides | Blue Mat Veronica | XGC |
| Veronica X 'Darwin's Blue' | Darwin's Blue Hyb. Veronica | GP |
| Veronica X 'Sunny Border Blue' | Sunny Border Blue Veronica | GP |
| Veronica X 'Waterperry' | Waterperry Hybrid Veronica | GC |
| Veronicastrum virginicum 'Albo-Rosea' | Pink-White Flowered Culver's Root | GP |
| Veronicastrum sibericum | Cluver's Root | GP |
| Vinca minor 'Bowles Variety' | Periwinkle / Myrtle | SGC |
| Viola X 'Irish Molly' | Irish Molly Violet | GP/SP |
| Viola cornuta 'Columbine' | English Violet | GP/SP |
| Viola cornuta 'Etain' | Etain Violet | GP/SP |
| Viola cornuta 'Letitia' | Letitia Violet | GP/SP |
| Viola cornuta 'Molly Sanderson' | Molly Sanderson Violet | GP/SP |
| Viola cornuta 'Painted Porcelain' | Painted Porcelain Violet | GP/SP |
| Viola cornuta 'Purple Showers' | Purple Showers Violet | GP/SP |
| Viola cornuta 'Rebecca' | English Violet | GP/SP |
| Viola corsica P.S. | Corsican Violet | GP/SP |
| Vitis 'St. Teresa Seedless' P.S. | St. Teresa Grape | VINE |
| Vitis 'Dornfelder' | Dornfelder (red) Grape | VINE |
| Waldsteinia fragarioides | Barren Strawberry | SGC |
| Zauschneria arizonica | Arizona Hummingbird Trumpet | XP |
| Zauschneria californica latifolia 'Solidarity Pink' | Pink Hummingbird Flower | XP |
| Zauschneria californica ssp. Latifolia | California Fuchsia | XP |
| Zauschneria californica 'Siskyou Dwarf' | Siskyou Dwarf Hummingbird Flower | XGC |
| Zauschneria californica 'Wayne's Select' HCG | Wayna'e Select Hummingbird Flower | XP |
| Zauschneria garrettii 'Mtn. Flame' HCG | Mtn. Flame Hummingbird Flower | XP |
| Zauschneria garrettii 'Orange Carpet' P.S. | Orange Carpet Hummingbird Flower | XGC |
| Zauschneria latifolia v. 'Etteri' HCG | Fire Red (California) Fuchsia | XP |
| Zinnia grandiflora | Golden Prairie Zinnia | XP |
| Zizophora clinopodioides HCG | Blue Mint Bush | XP |
| | |
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| Ground Cover, Reseeding Annual, Garden Biennial | | |
| Tender Perennial, Xeric Shrub | | |
| KEY: Rock Garden, Shade Perennial, Xeric Ground Cover | | |
| KEY: Rock Garden, Shade Perennial, Xeric Ground Cover | | |
