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1,204 Plants
- Ya Tan Daylily: Hemerocallis ’Ya Tan’
- Yaa Kammayee Lagascea Mollis: Lagascea mollis
- Yaaxpakan: Opuntia stricta
- Yaba: Andira inermis, Andira inermis rooseveltii
- Yabba Dabba Doo Daylily: Hemerocallis ’Yabba Dabba Doo’
- Yabumyoga: Pollia japonica
- Yachting Holiday Daylily: Hemerocallis ’Yachting Holiday’
- Yackety Yak Mrak Daylily: Hemerocallis ’Yackety Yak Mrak’
- Yacon: Polymnia sonchifolia
- Yadon’s Horkelia: Horkelia yadonii
- Yadon’s Piperia: Piperia yadonii
- Yadon’s Wallflower: Erysimum menziesii yadonii
- Yagati: Caesalpinia exostemma
- Yaguana: Eperua leucantha
- Yahoo Daylily: Hemerocallis ’Yahoo’
- Yahuana: Eperua leucantha
- Yak Rhododendron: Rhododendron yakushimanum, Rhododendron yakushimanum ’Fairy Princess’, Rhododendron yakushimanum ’Ken Janeck’, Rhododendron yakushimanum ’Mist Maiden’, Rhododendron yakushimanum ’Yaku Princess’
- Yakima Bird’s-Beak: Cordylanthus capitatus
- Yakima Milkvetch: Astragalus reventiformis
- Yakon: Polymnia sonchifolia
- Yaku Princess Rhododendron: Rhododendron x ’Yaku Princess’, Rhododendron yakushimanum ’Yaku Princess’
- Yakushima Hosta: Hosta ’Yakushima’
- Yakushima Mizu Hosta: Hosta ’Yakushima Mizu’
- Yakushimanum Hybrid Rhododedendron: Rhododendron ’Grumpy’, Rhododendron ’Hoppy’, Rhododendron ’Sneezy’
- Yakusimensis Hosta: Hosta ’Yakusimensis’
- Yakutsk Draba: Draba pseudopilosa
- Yakutsk Whitlow-Grass: Draba pseudopilosa
- Yale University Daylily: Hemerocallis ’Yale University’
- Yalta Daylily: Hemerocallis ’Yalta’
- Yam: Dioscorea composita, Dioscorea convolvulacea, Dioscorea floribunda, Dioscorea macrostachya, Dioscorea nummularia, Dioscorea pentaphylla, Dioscorea spiculiflora
- Yam Bean: Pachyrhizus ahipa, Pachyrhizus erosus, Pachyrhizus tuberosus
- Yam Daisy: Microseris lanceolata, Microseris nutans
- Yam Pea: Sphenostylis stenocarpa
- Yam-Leaved Clematis: Clematis terniflora
- Yama-No-Akebono Azalea: Rhododendron ’Yama-no-akebono’
- Yamaguchi’s Phyllostegia: Phyllostegia yamaguchii
- Yamashita Daylily: Hemerocallis ’Yamashita’
- Yambean: Pachyrhizus erosus
- Yamette Daylily: Hemerocallis ’Yamette’
- Yamo: Maniltoa floribunda
- Yampa: Perideridia gairdneri, Perideridia gairdneri borealis
- Yampa Beardtongue: Penstemon yampaensis
- Yampa River Cryptantha: Cryptantha stricta
- Yanchep Rose: Diplolaena angustifolia ’Orange Urchin’
- Yanco Daylily: Hemerocallis ’Yanco’
- Yang Tao: Actinidia arguta, Actinidia arguta ’Issai’, Actinidia arguta var. purpurea, Actinidia chinensis, Actinidia chinensis ’Hayward’, Actinidia chinensis ’Saanichton 12’
- Yang Tsé Crape Myrtle: Lagerstroemia indica ’Yang Tsé’
- Yango: Vataireopsis surinamensis
- Yank Daylily: Hemerocallis ’Yank’
- Yankee Blackberry: Rubus frondosus
- Yankee Blue Hosta: Hosta ’Yankee Blue’
- Yankee Charm Daylily: Hemerocallis ’Yankee Charm’
- Yankee Clipper Hosta: Hosta ’Yankee Clipper’
- Yankee Doodle Daylily: Hemerocallis ’Yankee Doodle’
- Yankee Doodle Hosta: Hosta ’Yankee Doodle’
- Yankee Doodle Mountain Laurel: Kalmia latifolia ’Yankee Doodle’
- Yankee Pedler Hosta: Hosta ’Yankee Pedler’
- Yankee Pride Daylily: Hemerocallis ’Yankee Pride’
- Yankee Skipper Standard Dwarf Bearded Iris: Iris ’Yankee Skipper’
- Yankee Tradition Daylily: Hemerocallis ’Yankee Tradition’
- Yankee Weed: Eupatorium compositifolium
- Yankeeweed: Eupatorium compositifolium
- Yapana: Eupatorium triplinerve
- Yape: Dipteryx punctata
- Yaqui Chief Daylily: Hemerocallis ’Yaqui Chief’
- Yaqui Tomato Lycopersicon Lycopersicum: Lycopersicon lycopersicum ’Yaqui’
- Yaquina Blue Tall Bearded Iris: Iris ’Yaquina Blue’
- Yara Yara: Duguetia lepidota
- Yard Knotweed: Polygonum aviculare, Polygonum aviculare aviculare
- Yard Lady Daylily: Hemerocallis ’Yard Lady’
- Yard Long Bean: Vigna unguiculata
- Yard Master Daylily: Hemerocallis ’Yard Master’
- Yard Rush: Juncus tenuis
- Yardarlba: Eucalyptus youngiana
- Yardley Daylily: Hemerocallis ’Yardley’
- Yardlong Bean: Vigna sesquipedalis ’Akasanjaku’, Vigna sesquipedalis ’AY Black’, Vigna sesquipedalis ’Bang Bua Tong’, Vigna sesquipedalis ’Black Eye’, Vigna sesquipedalis ’Black Seeded Snake Bean’, Vigna sesquipedalis ’Black Stripe Seed’, Vigna sesquipedalis ’Brown Seeded Snake Bean’, Vigna sesquipedalis ’Canton White’, Vigna sesquipedalis ’Chian’, Vigna sesquipedalis ’Chinese’, Vigna sesquipedalis ’Cuban Black Twiner’, Vigna sesquipedalis ’Doris’ Snake Bean’, Vigna sesquipedalis ’Dwarf Brown Seeded’, Vigna sesquipedalis ’Dwarf Snake Bean’, Vigna sesquipedalis ’Green Arrow’, Vigna sesquipedalis ’Johnnies’, Vigna sesquipedalis ’Kaohsiung’, Vigna sesquipedalis ’Katmandu’, Vigna sesquipedalis ’Katsang Panjang Snake Bean’, Vigna sesquipedalis ’Ko Men’, Vigna sesquipedalis ’Kurojuroku’, Vigna sesquipedalis ’Liana’, Vigna sesquipedalis ’Long White Snake’, Vigna sesquipedalis ’Malasian Brown-Seeded’, Vigna sesquipedalis ’Metro Noir’, Vigna sesquipedalis ’Metro rouge’, Vigna sesquipedalis ’Mosaic’, Vigna sesquipedalis ’Negro 5 Star No.3’, Vigna sesquipedalis ’No Name Snake Bean’, Vigna sesquipedalis ’Orient Extra Long’, Vigna sesquipedalis ’Orient Wonder’, Vigna sesquipedalis ’Phai Kwang’, Vigna sesquipedalis ’Purple Mart’, Vigna sesquipedalis ’Red Noodle’, Vigna sesquipedalis ’Red Seeded Snake Bean’, Vigna sesquipedalis ’Red Stripe Seed’, Vigna sesquipedalis ’Sabah Snake’, Vigna sesquipedalis ’Semi Climber’, Vigna sesquipedalis ’SJ’, Vigna sesquipedalis ’Stickless Wonder’, Vigna sesquipedalis ’Tsu In’, Vigna sesquipedalis ’White Seed’, Vigna sesquipedalis ’Wong’, Vigna sesquipedalis ’Yardlong Black’, Vigna unguiculata sesquipedalis, Vigna unguiculata subsp. sesquipedalis ’Green Noodle’
- Yardlong Or Asparagus Bean: Vigna unguiculata ’Chinese Green Noodle’, Vigna unguiculata ’Chinese Mosaic’, Vigna unguiculata ’Chinese Red Noodle’, Vigna unguiculata ’Kentucky Bush’, Vigna unguiculata ’Red-seeded’, Vigna unguiculata ’Taiwan Black’, Vigna unguiculata ’Thai Red Seeded’
- Yarey Palm: Copernicia baileyana
- Yarra Yarra Daylily: Hemerocallis ’Yarra Yarra’
- Yarrabah Satinash: Syzygium angophoroides
- Yarran: Acacia omalophylla
- Yarrow: Achillea ageratifolia, Achillea ageratifolia aizoon, Achillea atrata, Achillea ’Feuerland’, Achillea ’Fiesta’, Achillea ’Froelich’, Achillea glaberrima ’Gold Spray’, Achillea ’Hoffnung’, Achillea ’Jungfrau’, Achillea ’Mary Ann’, Achillea millefolium, Achillea millefolium ’Angelique’, Achillea millefolium ’Apple Blossom’, Achillea millefolium ’Cassis’, Achillea millefolium ’Cerise Queen’, Achillea millefolium ’Christel’, Achillea millefolium ’Colorado’, Achillea millefolium ’Debutante Mix’, Achillea millefolium ’Joey’, Achillea millefolium ’Lavender Beauty’, Achillea millefolium ’Oertel’s Rose’, Achillea millefolium ’Orange Queen’, Achillea millefolium ’Proa’, Achillea millefolium ’Red Beauty’, Achillea millefolium ’Red Velvet’, Achillea millefolium ’Royal Tapestry’, Achillea millefolium ’Salmon Beauty’, Achillea millefolium ’Snow Sport’, Achillea millefolium ’Summer Pastels’, Achillea millefolium ’Summer Wine’, Achillea millefolium ’Taygetea’, Achillea millefolium ’Taygetea Debutante’, Achillea millefolium ’Terracotta’, Achillea millefolium ’The Beacon’, Achillea millefolium var. arenicola, Achillea millefolium var. californica, Achillea millefolium var. rubra, Achillea millefolium ’Wesersandstein’, Achillea ’Moonshine’, Achillea ’Pretty Belinda’, Achillea ’Richard Nelson’, Achillea ’Sawa Sawa’, Achillea ’Schwellenberg’, Achillea ’Terracotta’, Achillea × kellereri
- Yarrow (Common): Achillea millefolium megacephalum
- Yasmin Daylily: Hemerocallis ’Yasmin’
- Yatabes Cypripedium: Cypripedium guttatum
- Yatay Palm: Butia yatay
- Yate: Eucalyptus cornuta
- Yauacano: Eperua leucantha
- Yauco: Cordia gerascanthus
- Yaupon: Ilex vomitoria
- Yaupon Blacksenna: Seymeria cassioides
- Yaupon Holly: Ilex vomitoria, Ilex vomitoria ’Pride of Houston’, Ilex vomitoria ’Saratoga Gold’
- Yautia: Xanthosoma sagittifolium, Xanthosoma sagittifolium ’Chartreuse Giant’
- Yautia Amarilla: Xanthosoma atrovirens ’Variegatum Monstrosum’, Xanthosoma sagittifolium
- Yautia Horqueta: Xanthosoma caracu
- Yautia Madera: Montrichardia arborescens
- Yavapai Buckwheat: Eriogonum ericifolium, Eriogonum ericifolium var. ericifolium, Eriogonum ericifolium var. pulchrum
- Yavapai County Buckwheat: Eriogonum ericifolium, Eriogonum ericifolium var. ericifolium, Eriogonum ericifolium var. pulchrum
- Yavapai Wild Buckwheat: Eriogonum ericifolium
- Yaw Root: Stillingia sylvatica
- Yawaridan: Tachigali pubiflora, Tachigali rusbyi
- Yawarridan: Sclerolobium guianense
- Yawato-So: Peltoboykinia tellimoides
- Yawning Leek-Orchid: Prasophyllum hians
- Yazoo Apricot Ice Daylily: Hemerocallis ’Yazoo Apricot Ice’
- Yazoo Banana Peel Daylily: Hemerocallis ’Yazoo Banana Peel’
- Yazoo Beauty Daylily: Hemerocallis ’Yazoo Beauty’
- Yazoo Beverly Klamer Daylily: Hemerocallis ’Yazoo Beverly Klamer’
- Yazoo Bob Eckert Daylily: Hemerocallis ’Yazoo Bob Eckert’
- Yazoo Burgundy Baby Daylily: Hemerocallis ’Yazoo Burgundy Baby’
- Yazoo Christmas Cheer Daylily: Hemerocallis ’Yazoo Christmas Cheer’
- Yazoo Cinnamon Stick Daylily: Hemerocallis ’Yazoo Cinnamon Stick’
- Yazoo Delta Daylily: Hemerocallis ’Yazoo Delta’
- Yazoo Double Butterscotch Daylily: Hemerocallis ’Yazoo Double Butterscotch’
- Yazoo Doug Mayfield Daylily: Hemerocallis ’Yazoo Doug Mayfield’
- Yazoo Elsie Hintson Daylily: Hemerocallis ’Yazoo Elsie Hintson’
- Yazoo Eye-catcher Daylily: Hemerocallis ’Yazoo Eye-Catcher’
- Yazoo Forever Amber Daylily: Hemerocallis ’Yazoo Forever Amber’
- Yazoo Frances Hart Daylily: Hemerocallis ’Yazoo Frances Hart’
- Yazoo Fuchsia Fairy Daylily: Hemerocallis ’Yazoo Fuchsia Fairy’
- Yazoo Gene Klamer Daylily: Hemerocallis ’Yazoo Gene Klamer’
- Yazoo Ginger Peach Daylily: Hemerocallis ’Yazoo Ginger Peach’
- Yazoo Golden Harvest Daylily: Hemerocallis ’Yazoo Golden Harvest’
- Yazoo Green Grasshopper Daylily: Hemerocallis ’Yazoo Green Grasshopper’
- Yazoo Green Octopus Daylily: Hemerocallis ’Yazoo Green Octopus’
- Yazoo Hoot Owl Daylily: Hemerocallis ’Yazoo Hoot Owl’
- Yazoo Jim Terry Daylily: Hemerocallis ’Yazoo Jim Terry’
- Yazoo Johnny Hughes Daylily: Hemerocallis ’Yazoo Johnny Hughes’
- Yazoo Lailon Dorsey Daylily: Hemerocallis ’Yazoo Lailon Dorsey’
- Yazoo Lavender Balm Daylily: Hemerocallis ’Yazoo Lavender Balm’
- Yazoo Lavender Rose Daylily: Hemerocallis ’Yazoo Lavender Rose’
- Yazoo Lemon Chess Daylily: Hemerocallis ’Yazoo Lemon Chess’
- Yazoo Lemon Mint Daylily: Hemerocallis ’Yazoo Lemon Mint’
- Yazoo Lilac Time Daylily: Hemerocallis ’Yazoo Lilac Time’
- Yazoo Mildred Primos Daylily: Hemerocallis ’Yazoo Mildred Primos’
- Yazoo Moire Taffeta Daylily: Hemerocallis ’Yazoo Moire Taffeta’
- Yazoo Night Moth Daylily: Hemerocallis ’Yazoo Night Moth’
- Yazoo Parfait Daylily: Hemerocallis ’Yazoo Parfait’
- Yazoo Pink Frills Daylily: Hemerocallis ’Yazoo Pink Frills’
- Yazoo Pink Tizzy Daylily: Hemerocallis ’Yazoo Pink Tizzy’
- Yazoo Powderpuff Daylily: Hemerocallis ’Yazoo Powderpuff’
- Yazoo Rosy Ogrady Daylily: Hemerocallis ’Yazoo Rosy O’Grady’
- Yazoo Royalty Daylily: Hemerocallis ’Yazoo Royalty’
- Yazoo Scarlet Ohara Daylily: Hemerocallis ’Yazoo Scarlet O’Hara’
- Yazoo Souffle Daylily: Hemerocallis ’Yazoo Souffle’
- Yazoo Star Fire Daylily: Hemerocallis ’Yazoo Star Fire’
- Yazoo Sunkist Daylily: Hemerocallis ’Yazoo Sunkist’
- Yazoo Voleta Pate Daylily: Hemerocallis ’Yazoo Voleta Pate’
- Yazoo Wagon Wheel Daylily: Hemerocallis ’Yazoo Wagon Wheel’
- Yazoo Washed Copper Daylily: Hemerocallis ’Yazoo Washed Copper’
- Yazoo Wedding Petticoat Daylily: Hemerocallis ’Yazoo Wedding Petticoat’
- Yazoo Wild Honey Daylily: Hemerocallis ’Yazoo Wild Honey’
- Yazoo Wild Violet Daylily: Hemerocallis ’Yazoo Wild Violet’
- Ye Gates Daylily: Hemerocallis ’Ye Gates’
- Ye Gu: Aeginetia indica
- Ye’eb: Cordeauxia edulis
- Yearning Love Daylily: Hemerocallis ’Yearning Love’
- Yeba: Eperua purpurea
- Yebaro: Eperua purpurea
- Yebero: Eperua purpurea
- Yebit Daylily: Hemerocallis ’Yebit’
- Yedda Hawthorne: Rhaphiolepis umbellata
- Yeddo Euonymus: Euonymus hamiltonianus var. sieboldianus
- Yeddo Hawthorn: Rhaphiolepis umbellata
- Yeddo Hawthorne: Rhaphiolepis umbellata
- Yeddo Spruce: Picea jezoensis
- Yeddo Viburnum: Viburnum bitchiuense
- Yefen: Fuirena umbellata
- Yego Nori: Campylaephora hypnaeoides
- Yeheb: Cordeauxia edulis
- Yella Mountain Road Daylily: Hemerocallis ’Yella Mountain Road’
- Yello Stuffer Tomato Lycopersicon Lycopersicum: Lycopersicon lycopersicum ’Yello Stuffer’
- Yellow
Cockspur: Centaurea solstitialis
- Yellow: Phaseolus vulgaris ’Golden Improved’, Phaseolus vulgaris ’Merveille de Piemonte’, Phaseolus vulgaris ’Mont d’or’, Phaseolus vulgaris ’Patrizia’, Phaseolus vulgaris ’Romano Gold’, Phaseolus vulgaris ’Scala’, Phaseolus vulgaris ’Supernano giallo’, Phaseolus vulgaris ’Uranus’
- Yellow crownbeard: Verbesina helianthoides
- Yellow Foxtail: Setaria pumila
- Yellow / Orange Fringed Orchid: Habenaria ciliaris
- Yellow Acacia: Caragana arborescens
- Yellow Alder: Turnera pumilea, Turnera ulmifolia, Turnera ulmifolia var. elegans
- Yellow Alfalfa: Medicago sativa falcata
- Yellow Alicoche: Echinocereus papillosus, Echinocereus papillosus Linke ex Rümpler var. angusticeps (Clove, Echinocereus papillosus var. angusticeps
- Yellow Allamanda: Allamanda cathartica, Allamanda cathartica ’Golden Butterfly’, Allamanda cathartica var. hendersonii, Allamanda cathartica ’Williamsii’
- Yellow Alpine Milkvetch: Astragalus frigidus
- Yellow Alyssum: Alyssum alyssoides
- Yellow and Purple Monkeyflower: Mimulus densus
- Yellow and White Monkeyflower: Mimulus bicolor
- Yellow Anemone: Anemone richardsonii
- Yellow Angel Daylily: Hemerocallis ’Yellow Angel’
- Yellow Anise: Illicium parviflorum
- Yellow Anise Tree: Illicium parviflorum
- Yellow Anise-Tree: Illicium parviflorum
- Yellow Anisetree: Illicium parviflorum
- Yellow Arch-Angel: Lamiastrum galeobdolon
- Yellow Archangel: Galeobdolon luteum, Lamiastrum galeobdolon, Lamiastrum galeobdolon (L.) Ehrend. and Polatschek ’Florentinum’, Lamium galeobdolon ’Hermann’s Pride’, Lamium galeobdolon montanum ’Florentinum’, Lamium galeobdolon ’Petit Point’, Lamium galeobdolon ’Silver Spangles’
- Yellow Arctic Draba: Draba nivalis
- Yellow Arctic Whitlow-Grass: Draba nivalis
- Yellow Arctic Whitlowgrass: Draba nivalis var. nivalis Lilj.
- Yellow Asphodel: Asphodeline lutea, Narthecium americanum
- Yellow Aster: Eastwoodia elegans
- Yellow Autumn Sage: Salvia greggii ’Moonlight’
- Yellow Avalanche-Lily: Erythronium grandiflorum, Erythronium grandiflorum chrysandrum, Erythronium grandiflorum grandiflorum
- Yellow Avens: Geum aleppicum
- Yellow Awn Candle Snuffer Moss: Encalypta rhaptocarpa
- Yellow Baby Daylily: Hemerocallis ’Yellow Baby’
- Yellow Bachelors Buttons: Polygala lutea
- Yellow Ball Orchid: Pomatocalpa brachybotrya
- Yellow Ball-Mustard: Neslia paniculata
- Yellow Balsam: Croton flavens
- Yellow Banksia: Rosa banksiae ’Lutea’
- Yellow Baptisia: Baptisia sphaerocarpa, Baptisia sphaerocarpa ’Screamin’ Yellow’
- Yellow Barleria: Barleria micans
- Yellow Bartsia: Parentucellia viscosa
- Yellow Bauhinia: Bauhinia tomentosa
- Yellow Beardtongue: Penstemon confertus
- Yellow Beavertail: Opuntia aurea
- Yellow Bee: Oncidium ampliatum
- Yellow Bee Plant: Cleome lutea
- Yellow Beeplant: Cleome lutea
- Yellow Bell: Fritillaria pudica
- Yellow Bell Bauhinia: Bauhinia tomentosa
- Yellow Bell Orchid Tree: Bauhinia tomentosa
- Yellow Belladonna: Atropa belladonna ’Lutea’
- Yellow Bellflower: Campanula thyrsoides
- Yellow Bells: Elmera racemosa, Fritillaria pudica, Tecoma stans, Tecoma stans var. angustata
- Yellow Birch: Betula alleghaniensis, Betula alleghaniensis Britton var. alleghaniensis Britton, Betula alleghaniensis Britton var. macrolepis (Fern.) Brayshaw
- Yellow Bird Cucumbertree Magnolia: Magnolia acuminata (L.) L. ’Yellow Bird’
- Yellow Bird Hager Daylily: Hemerocallis ’Yellow Bird Hager’
- Yellow Bird Hosta: Hosta ’Yellow Bird’
- Yellow Bird Magnolia: Magnolia x ’Yellow Bird’
- Yellow Bird of Paradise: Caesalpinia gillesii, Caesalpinia gilliesii
- Yellow Birds-Nest: Monotropa hypopitys
- Yellow Birdsfoot: Ornithopus compressus
- Yellow Biscuit Daylily: Hemerocallis ’Yellow Biscuit’
- Yellow Blade Hosta: Hosta ’Yellow Blade’
- Yellow Blanketflower: Gaillardia flava
- Yellow Bleeding Heart: Corydalis sempervirens, Ehrendorferia ochroleuca, Pseudofumaria lutea
- Yellow Bleedingheart: Ehrendorferia ochroleuca
- Yellow Bleedinghearts: Ehrendorferia ochroleuca
- Yellow Blizzard Garden Mum: Chrysanthemum’Yellow Blizzard’
- Yellow Bloodleaf: Iresine flavescens
- Yellow Bloodwood: Corymbia eximia
- Yellow Blue-Eyed Grass: Sisyrinchium patagonicum
- Yellow Bluestem: Andropogon glomeratus, Andropogon gyrans, Andropogon virginicus, Bothriochloa ischaemum, Bothriochloa ischaemum var. ischaemum, Bothriochloa ischaemum var. songarica
- Yellow Boa Hosta: Hosta ’Yellow Boa’
- Yellow Bonanza Daylily: Hemerocallis ’Yellow Bonanza’
- Yellow Bonbon Daylily: Hemerocallis ’Yellow Bonbon’
- Yellow Bouquet Daylily: Hemerocallis ’Yellow Bouquet’
- Yellow Bractspike: Yeatesia viridiflora
- Yellow Brick Road Daylily: Hemerocallis ’Yellow Brick Road’
- Yellow Brick Road Tall Bearded Iris: Iris ’Yellow Brick Road’
- Yellow Bristle Grass: Setaria pumila
- Yellow Bristlegrass: Pennisetum glaucum, Setaria leucopila, Setaria parviflora, Setaria pumila, Setaria pumila pallidifusca
- Yellow Buckeye: Aesculus flava, Aesculus pavia var. flavescens
- Yellow Buckwheat: Eriogonum fasciculatum
- Yellow Bugle: Ajuga chamaepitys
- Yellow Bunny Ears: Opuntia microdasys ’Lutea’
- Yellow Bush Daisy: Euryops cham ’Purfled’, Euryops pectinatus
- Yellow Bush Lupine: Lupinus arboreus
- Yellow Bush Snapdragon: Keckiella antirrhinoides
- Yellow Buttercups: Turnera ulmifolia, Turnera ulmifolia var. elegans
- Yellow Butterfly Palm: Dypsis lutescens
- Yellow Butterfly Tree: Bauhinia tomentosa
- Yellow Butterfly Vine: Mascagnia macroptera
- Yellow Butterwort: Pinguicula lutea
- Yellow Buttons: Chrysocephalum apiculatum ’Baby Gold’
- Yellow Buttons Daylily: Hemerocallis ’Yellow Buttons’
- Yellow Camellia: Camellia chrysantha, Camellia nitidissima
- Yellow Canary Daylily: Hemerocallis ’Yellow Canary’
- Yellow Canbya: Canbya aurea
- Yellow Candelabra Primrose: Primula chungensis
- Yellow Candle Wood: Senna bicapsularis
- Yellow Canna: Canna lutea
- Yellow Cape Honeysuckle: Tecomaria capensis ’Lutea’
- Yellow Caper: Oxystylis lutea
- Yellow Carabeen: Sloanea woollsii
- Yellow Carolina Milkvine: Matelea flavidula
- Yellow Cascade Daylily: Hemerocallis ’Yellow Cascade’
- Yellow Catnip: Nepeta govaniana
- Yellow Celosia: Celosia argentea var. plumosa ’Yellow’
- Yellow Cephalaria: Cephalaria alpina
- Yellow Cestrum: Cestrum aurantiacum
- Yellow Chaenactis: Chaenactis glabriuscula
- Yellow Chaff-Flower: Alternanthera flavescens
- Yellow Champion Daylily: Hemerocallis ’Yellow Champion’
- Yellow Chandelier Daylily: Hemerocallis ’Yellow Chandelier’
- Yellow Charger Daylily: Hemerocallis ’Yellow Charger’
- Yellow Charm Daylily: Hemerocallis ’Yellow Charm’
- Yellow Cheerfulness Daylily: Hemerocallis ’Yellow Cheerfulness’
- Yellow Chestnut Oak: Quercus muehlenbergii
- Yellow Chincherinchee: Ornithogalum dubium
- Yellow Chinese Hat: Holmskiolda citrina
- Yellow Chinese Toad Lily: Tricyrtis macrantha
- Yellow Climbing Bleeding Heart: Dicentra scandens ’Athens Yellow’
- Yellow Clintonia: Clintonia borealis
- Yellow Clivia: Clivia miniata
- Yellow Clover: Trifolium aureum
- Yellow Cobra Lily: Chasmanthe floribunda var. duckittii
- Yellow Colic-Root: Aletris lutea
- Yellow Colicroot: Aletris lutea
- Yellow Columbine: Aquilegia chrysantha, Aquilegia chrysantha ’Flore Pleno’, Aquilegia chrysantha ’Yellow Star’, Aquilegia flavescens, Aquilegia flavescens var. flavescens, Aquilegia flavescens var. miniata, Aquilegia flavescens var. rubicunda
- Yellow Comb Orchid: Bulbophyllum retusiusculum
- Yellow Comet Stickleaf: Mentzelia affinis
- Yellow Coneflower: Echinacea paradoxa, Ratibida columnifera, Ratibida columnifera ’Red Midget’, Ratibida columnifera ’Red’
- Yellow Coralbells: Elmera racemosa
- Yellow Coralroot: Corallorrhiza trifida
- Yellow Corduroy Daylily: Hemerocallis ’Yellow Corduroy’
- Yellow Corduroy Delight Daylily: Hemerocallis ’Yellow Corduroy Delight’
- Yellow Corn-Lily: Clintonia borealis
- Yellow Corydalis: Corydalis flavula, Corydalis ophiocarpa, Pseudofumaria lutea
- Yellow Cow Lily: Nuphar luteum
- Yellow Cowlily: Nuphar lutea, Nuphar lutea macrophylla, Nuphar lutea pumila, Nuphar lutea sagittifolia, Nuphar lutea var. kalmiana, Nuphar lutea variegata
- Yellow Crabgrass: Digitaria fuscescens
- Yellow Crane Orchid: Phaius flavus
- Yellow Creeping Jenny: Lysimachia nummularia ’Aurea’
- Yellow Creeping Monkey-Flower: Mimulus primuloides
- Yellow Creeping Zinnia: Sanvitalia ocymoides
- Yellow Crocus: Crocus flavus
- Yellow Crossandra: Crossandra infundibuliformis
- Yellow Crow Orchid: Corymborchis flava
- Yellow Crown Of Thorns: Euphorbia milii var. lutea
- Yellow Crown-Beard: Verbesina occidentalis
- Yellow Crownbeard: Verbesina occidentalis
- Yellow Cryptantha: Cryptantha flava
- Yellow Cucumbertree: Magnolia acuminata (L.) L. var. subcordata (Spach) Dandy
- Yellow Cups: Camissonia brevipes
- Yellow Curlicue Daylily: Hemerocallis ’Yellow Curlicue’
- Yellow Currant Tomato: Lycopersicon lycopersicum ’Yellow Currant’
- Yellow Cutleaf: Hymenopappus filifolius Hook. var. lugens (Greene) Jeps.
- Yellow Cypress: Chamaecyparis nootkatensis ’Aurea’, Chamaecyparis nootkatensis ’Variegata’, Xanthocyparis nootkatensis
- Yellow Daisy: Chrysanthemum multicaule
- Yellow Daylily: Hemerocallis lilioasphodelus, Hemerocallis lilioasphodelus var. yezoensis
- Yellow Dead Nettle: Lamiastrum galeobdolon’Herman’s Pride’
- Yellow Delight Daylily: Hemerocallis ’Yellow Delight’
- Yellow Desert Mariposa: Calochortus kennedyi var. munzii
- Yellow Design Tall Bearded Iris: Iris ’Yellow Design’
- Yellow Devil Hawkweed: Hieracium floribundum
- Yellow Devil Hawkweed Hieracium Floribundum: Hieracium floribundum
- Yellow Diamond Daylily: Hemerocallis ’Yellow Diamond’
- Yellow Dipladenia: Pentalinon luteum
- Yellow Dock: Rumex crispus
- Yellow Dog Daylily: Hemerocallis ’Yellow Dog’
- Yellow Dog Tooth Violet: Erythronium rostratum
- Yellow Dogwood: Pomaderris elliptica
- Yellow Dome: Trichoptilium incisum
- Yellow Drop: Onosma sericea
- Yellow Dwarf Poinciana: Caesalpinia gillesii
- Yellow Dyckia: Dyckia sulphurea
- Yellow Early Bird Daylily: Hemerocallis ’Yellow Early Bird’
- Yellow Ebine: Calanthe striata
- Yellow Elder: Tecoma slans, Tecoma stans, Tecoma stans ’Gold Star’
- Yellow Emperor Daylily: Hemerocallis ’Yellow Emperor’
- Yellow Emperor Hosta: Hosta ’Yellow Emperor’
- Yellow Eriastrum: Eriastrum luteum
- Yellow Eriogonum: Eriogonum flavum
- Yellow Evening Primrose: Calylophus serrulatus, Oenothera flava flava, Oenothera flava taraxacoides
- Yellow Evening-Primrose: Oenothera flava, Oenothera flava flava, Oenothera flava taraxacoides, Oenothera villosa
- Yellow Eveningprimrose: Oenothera flava, Oenothera flava flava
- Yellow Exaltation Daylily: Hemerocallis ’Yellow Exaltation’
- Yellow Explosion Daylily: Hemerocallis ’Yellow Explosion’
- Yellow Eyebright: Euphrasia cockayniana
- Yellow Eyed Grass: Sisyrinchium arenarium, Sisyrinchium striatum
- Yellow Eyes Hosta: Hosta ’Yellow Eyes’
- Yellow Fairybells: Disporum flavum, Disporum lanuginosum
- Yellow False Acacia: Robinia pseudoacacia, Robinia pseudoacacia ’Bessoniana’, Robinia pseudoacacia ’Frisia’, Robinia pseudoacacia L. ’Casque Rouge’, Robinia pseudoacacia L. ’Coluteoides’, Robinia pseudoacacia ’Purple Robe’, Robinia pseudoacacia ’Semperflorens’, Robinia pseudoacacia ’Tortuosa’, Robinia pseudoacacia ’Twisty Baby’, Robinia pseudoacacia ’Unifoliola’
- Yellow False-Foxglove: Aureolaria flava
- Yellow Feltplant: Horsfordia newberryi
- Yellow Fennel Flower: Nigella orientalis, Nigella orientalis ’Transformer’
- Yellow Fever Daylily: Hemerocallis ’Yellow Fever’
- Yellow Fieldcress: Rorippa sylvestris
- Yellow Fieldcress Rorippa Sylvestris: Rorippa sylvestris
- Yellow Fir: Abies grandis, Abies grandis x concolor
- Yellow Flag: Iris ’Holden Clough’, Iris pseudacorus, Iris pseudacorus ’Berlin Tiger’, Iris pseudacorus ’Ivory’, Iris pseudacorus ’Roy Davidson’, Patersonia umbrosa var. xanthina
- Yellow Flag Iris: Iris pseudacorus ’Foxcroft Full Moon’, Iris pseudacorus ’Gordonville Cream’, Iris pseudacorus ’Gordonville White’, Iris pseudacorus ’King Clovis’, Iris pseudacorus ’Krill’, Iris pseudacorus ’Sun Cascade’
- Yellow Flamboyant: Peltophorum pterocarpa
- Yellow Flame: Peltophorum pterocarpum
- Yellow Flame Grevillea: Grevillea eriostachya
- Yellow Flame Hosta: Hosta ’Yellow Flame’
- Yellow Flame Thrower Palm: Chambeyronia macrocarpa var. hookeri
- Yellow Flame Tree: Peltophorum pterocarpum
- Yellow Flatsedge: Cyperus flavescens
- Yellow Flax: Linum flavum ’Compactum’, Linum medium, Linum trigynum, Reinwardtia indica
- Yellow Floating-Heart: Nymphoides peltata
- Yellow Floatingheart: Nymphoides peltata
- Yellow Flowered Moss: Draba oligosperma
- Yellow Flowering Maple: Abutilon hybridum ’Luteus’
- Yellow Flymallow: Cienfuegosia drummondii
- Yellow Foxglove: Digitalis grandiflora, Digitalis grandiflora ’Carillon’
- Yellow Foxtail: Setaria leucopila
- Yellow Foxtail Grass: Alopecurus pratensis ’Aureus’
- Yellow Fringe: Nymphoides geminata
- Yellow Fringed Orchid: Platanthera ciliaris
- Yellow Fringeless Orchid: Platanthera integra
- Yellow Frisbee Daylily: Hemerocallis ’Yellow Frisbee’
- Yellow Fritillary: Fritillaria pudica
- Yellow Frosting Daylily: Hemerocallis ’Yellow Frosting’
- Yellow Fruit Sedge: Carex annectens
- Yellow Fruit Winterberry: Ilex verticillata f. chrysocarpa
- Yellow Fruited American Holly: Ilex opaca f. xanthocarpa
- Yellow Fugosia: Cienfuegosia drummondii
- Yellow Fumewort: Corydalis flavula
- Yellow Gardenia: Gardenia coronata
- Yellow Geiger: Cordia lutea
- Yellow Gentian: Gentiana alba, Gentiana lutea, Gentiana lutea symphyandra
- Yellow Giant Hyssop: Agastache nepetoides
- Yellow Gianthyssop: Agastache nepetoides
- Yellow Gilia: Gilia filiformis
- Yellow Gily-Flower: Gilia filiformis
- Yellow Ginger: Hedychium flavescens
- Yellow Girl Standard Dwarf Bearded Iris: Iris ’Yellow Girl’
- Yellow Glandweed: Parentucellia viscosa
- Yellow Glow Canna Lily: Canna x generalis’Yellow Glow’
- Yellow Goat’s Beard: Tragopogon dubius
- Yellow Goats Beard: Tragopogon pratensis
- Yellow Gold Joy Daylily: Hemerocallis ’Yellow Gold Joy’
- Yellow Goodmania: Goodmania luteola
- Yellow Granadilla: Passiflora laurifolia
- Yellow Grape Hyacinth: Muscari macrocarpum, Muscari macrocarpum ’Golden Fragrance’
- Yellow Grass: Draba haynaldii
- Yellow Groove Bamboo: Phyllostachys aureosulcata
- Yellow Grove Bamboo: Phyllostachys aureosulcata
- Yellow Guinea Yam: Dioscorea cayenensis, Dioscorea cayennensis
- Yellow Gum: Eucalyptus leucoxylon
- Yellow Hair Daylily: Hemerocallis ’Yellow Hair’
- Yellow Hairgrass: Aira praecox
- Yellow Hakea: Hakea nodosa
- Yellow Hardhead: Centaurea macrocephala
- Yellow Hatpins: Syngonanthus flavidulus
- Yellow Haw: Crataegus flava
- Yellow Hawksbeard: Hieracium fendleri
- Yellow Hawkweed: Hieracium caespitosum, Hieracium canadense, Hieracium fendleri, Hieracium fendleri var. discolor Gray, Hieracium fendleri var. fendleri Sch.Bip., Hieracium fendleri var. mogollense Gray, Tolpis barbata
- Yellow Heart Tree: Zanthoxylum flavum
- Yellow Hedgehyssop: Gratiola flava
- Yellow Herons Bill: Erodium chrysanthum
- Yellow High Hosta: Hosta ’Yellow High’
- Yellow Highness Hosta: Hosta ’Yellow Highness’
- Yellow Himalayan Blackberry Rubus Ellipticus Var. Ordatus: Rubus ellipticus var. ordatus
- Yellow Himalayan Raspberry: Rubus ellipticus
- Yellow Honeysuckle: Lonicera flava, Lonicera reticulata
- Yellow Horned Poppy: Glaucium flavum, Glaucium flavum ’Extra’
- Yellow Hornpoppy: Glaucium flavum
- Yellow Horse Gentain: Triosteum angustifolium
- Yellow Horsechestnut: Aesculus × neglecta ’Erythroblastos’
- Yellow Houseleek: Aichryson villosum, Sempervivum wulfenii
- Yellow Impatiens: Impatiens repens
- Yellow Indian Mallow: Abutilon malacum
- Yellow Indian Paintbrush: Castilleja flava, Castilleja flava var. flava, Castilleja sessiliflora
- Yellow Indian Shoe: Cypripedium pubescens
- Yellow Indian-Grass: Sorghastrum nutans
- Yellow Indian-Mallow: Abutilon malacum
- Yellow Ipe: Tabebuia chrysotricha
- Yellow Ipomoea: Ochna natalitia
- Yellow Iris: Iris forrestii, Iris pseudacorus
- Yellow Ironweed: Verbesina alternifolia
- Yellow Jacaranda: Peltophorum dubium, Tipuana tipu
- Yellow Jacket Daylily: Hemerocallis ’Yellow Jacket’
- Yellow Jacket Hosta: Hosta ’Yellow Jacket’
- Yellow Jacket Rose: Rosa ’Yellow Jacket’
- Yellow Jacobinia: Justicia aurea
- Yellow Jade Orchid Tree: Magnolia champaca
- Yellow Jasmine: Jasminum humile, Jasminum humile var. revolutum, Jasminum odoratissimum
- Yellow Jessamine: Gelsemium sempervirens, Gelsemium sempervirens ’Pride of Augusta’
- Yellow Jewel Daylily: Hemerocallis ’Yellow Jewel’
- Yellow Jewelweed: Impatiens pallida
- Yellow Joy Daylily: Hemerocallis ’Yellow Joy’
- Yellow Joy Weed: Alternanthera flavescens
- Yellow Joyweed: Alternanthera flavescens
- Yellow Justicia: Justicia aurea
- Yellow Kidney Vetch: Anthyllis hermanniae
- Yellow King Devil: Hieracium caespitosum
- Yellow King Humbert Canna Lily: Canna x generalis’Yellow King Humbert’
- Yellow Kitten Daylily: Hemerocallis ’Yellow Kitten’
- Yellow Knapweed: Centaurea orientalis
- Yellow Knotweed: Polygonum ramosissimum
- Yellow Kunzea: Kunzea muelleri
- Yellow Lady Banks Rose: Rosa banksiae ’Lutea’
- Yellow Lady Lenten Rose: Helleborus × hybridus ’Yellow Lady’
- Yellow Lady Slipper: Cypripedium pubescens
- Yellow Lady’s Slipper: Cypripedium calceolus, Cypripedium parviflorum
- Yellow Lady’s-Slipper: Cypripedium pubescens
- Yellow Ladybug Daylily: Hemerocallis ’Yellow Ladybug’
- Yellow Ladys Slipper Orchid: Cypripedium calceolus
- Yellow Ladyslipper: Cypripedium pubescens
- Yellow Lanceleaf Blanketflower: Gaillardia aestivalis
- Yellow Landscape Supreme Daylily: Hemerocallis ’Yellow Landscape Supreme’
- Yellow Lantern Banksia: Banksia lehmanniana, Banksia lemanniana
- Yellow Larkspur: Delphinium luteum
- Yellow Latan Palm: Ceiba speciosa, Latania verschaffeltii
- Yellow Lawyer Cane: Calamus moti
- Yellow Leaf-Cup: Smallanthus uvedalius
- Yellow Leafbract: Malachra alceifolia
- Yellow Leek-Orchid: Prasophyllum flavum
- Yellow Leopard Canna Lily: Canna x generalis’Yellow Leopard’
- Yellow Lip Orchid: Chrysoglossum ornatum
- Yellow Llima: Sida fallax
- Yellow Locust: Robinia pseudoacacia, Robinia pseudoacacia ’Bessoniana’, Robinia pseudoacacia ’Frisia’, Robinia pseudoacacia L. ’Casque Rouge’, Robinia pseudoacacia L. ’Coluteoides’, Robinia pseudoacacia ’Purple Robe’, Robinia pseudoacacia ’Semperflorens’, Robinia pseudoacacia ’Tortuosa’, Robinia pseudoacacia ’Twisty Baby’, Robinia pseudoacacia ’Unifoliola’
- Yellow Lollipop Daylily: Hemerocallis ’Yellow Lollipop’
- Yellow Lollipop Dwarf Daylily: Hemerocallis x ’Yellow Lollipop’
- Yellow Lollipop Hosta: Hosta ’Yellow Lollipop’
- Yellow Loosestrife: Lysimachia punctata
- Yellow Lucerne: Medicago falcata
- Yellow Lupin: Crotalaria retusa, Lupinus luteus
- Yellow Lupin Lupinus Luteus: Lupinus luteus
- Yellow Lupine: Lupinus lutescens
- Yellow Madness Petunia: Petunia floribunda ’Yellow Madness’
- Yellow Mahseer: Gleditschia amorphoides
- Yellow Mallow: Pavonia praemorsa
- Yellow Mammoth Daylily: Hemerocallis ’Yellow Mammoth’
- Yellow Mandarin: Disporum flavum, Disporum lanuginosum, Disporum maculatum, Prosartes lanuginosum
- Yellow Mandevilla: Pentalinon luteum
- Yellow Mangosteen: Atractocarpus fitzalanii, Garcinia xanthochymus
- Yellow Margin Orchid: Cymbidium pumilum
- Yellow Mariposa: Calochortus luteus, Calochortus superbus
- Yellow Mariposa Lily: Calochortus luteus, Calochortus luteus ’Golden Orb’
- Yellow Marsh Marigold: Caltha palustris var. dives, Caltha palustris var. palmeri
- Yellow Marsh Saxifrage: Saxifraga hirculus
- Yellow Marsh-Marigold: Caltha palustris, Caltha palustris var. dives, Caltha palustris var. palmeri
- Yellow Marshmarigold: Caltha palustris, Caltha palustris var. dives, Caltha palustris var. palmeri
- Yellow Martagon Lily: Lilium hansonii
- Yellow Mats: Sanicula arctopoides
- Yellow Meadow Beauty: Rhexia lutea
- Yellow Meadowbeauty: Rhexia lutea
- Yellow Meranti: Shorea acuminatissima, Shorea blumutensis, Shorea faguetiana, Shorea gibbosa, Shorea hopeifolia, Shorea iliasii, Shorea kudatensis, Shorea laxa, Shorea longisperma, Shorea macrobalanos, Shorea maxima, Shorea multiflora, Shorea peltata, Shorea polyandra, Shorea xanthophylla
- Yellow Messmate: Eucalyptus cloeziana
- Yellow Mexican Sage: Salvia microphylla ’Lutea’
- Yellow Mignonette: Reseda lutea
- Yellow Milk-Vetch: Astragalus flavus
- Yellow Milkvetch: Astragalus flavus
- Yellow Milkwort: Polygala rugelii
- Yellow Mission-Bells: Fritillaria pudica
- Yellow Missionbells: Fritillaria pudica
- Yellow Mist Daylily: Hemerocallis ’Yellow Mist’
- Yellow Mock Aster: Eastwoodia elegans
- Yellow Mock-Aster: Eastwoodia elegans
- Yellow Moire Daylily: Hemerocallis ’Yellow Moire’
- Yellow Mombin: Spondias mombin
- Yellow Monarch Daylily: Hemerocallis ’Yellow Monarch’
- Yellow Monardella: Monardella nana, Monardella nana arida, Monardella nana leptosiphon, Monardella nana nana, Monardella nana tenuiflora
- Yellow Monkshood: Aconitum anthora
- Yellow Monkswort: Nonea lutea
- Yellow Montbretia: Crocosmia × crocosmiiflora
- Yellow Moosedung Moss: Splachnum luteum
- Yellow Morning Glory: Ipomoea ochracea, Merremia aurea, Merremia tuberosa
- Yellow Mountain Avens: Dryas drummondii
- Yellow Mountain Saxifrage: Saxifraga aizoides
- Yellow Mountain-Avens: Dryas drummondii, Dryas drummondii var. eglandulosa
- Yellow Mussaenda: Pseudomussaenda flava
- Yellow Mustard: Guillenia flavescens
- Yellow Nail-Wort: Paronychia virginica
- Yellow Nailwort: Paronychia virginica
- Yellow Navarretia: Navarretia breweri
- Yellow Necklace Pod: Sophora tomentosa
- Yellow Necklacepod: Sophora tomentosa var. truncata
- Yellow Neptunia: Neptunia lutea
- Yellow Nicker: Caesalpinia bonduc, Caesalpinia major
- Yellow Nightshade Groundcherry: Physalis crassifolia
- Yellow Noah’s Ark: Cypripedium pubescens
- Yellow Nodding Ladies’-Tresses: Spiranthes ochroleuca
- Yellow Nutgrass: Cyperus esculentus L. var. sativus Boeck.
- Yellow Nutsedge: Cyperus esculentus, Cyperus esculentus L. var. sativus Boeck., Cyperus esculentus var. leptostachyus, Cyperus esculentus var. macrostachyus
- Yellow Oatgrass: Trisetum flavescens
- Yellow Oleander: Thevetia nereifolia, Thevetia peruviana
- Yellow Onion: Allium moly, Allium moly ’Jeannine’, Allium moly ’Sunny Twinkles’
- Yellow Orchid Tree: Bauhinia tomentosa
- Yellow Orchid Vine: Mascagnia macroptera
- Yellow Owl’s Clover: Castilleja campestris
- Yellow Owl’s-Clover: Orthocarpus luteus
- Yellow Owlclover: Orthocarpus luteus
- Yellow Ox-Eye Daisy: Rudbeckia hirta, Rudbeckia hirta ’Becky Mix’, Rudbeckia hirta ’Cherokee Sunset’, Rudbeckia hirta ’Chim Chiminee’, Rudbeckia hirta ’Goldilocks’, Rudbeckia hirta ’Hot Chocolate’, Rudbeckia hirta ’Indian Summer’, Rudbeckia hirta’Maya’, Rudbeckia hirta ’Moreno’, Rudbeckia hirta ’Prairie Sun’, Rudbeckia hirta ’Rustic Dwarfs Mix’, Rudbeckia hirta ’Sonora’, Rudbeckia hirta ’Toto Lemon’, Rudbeckia speciosa ’Viette’s Little Suzy’
- Yellow Oxalis: Oxalis corniculata
- Yellow Oxytropis: Oxytropis campestris
- Yellow Paintbrush: Castilleja flava
- Yellow Parasol Daylily: Hemerocallis ’Yellow Parasol’
- Yellow Parentucellia: Parentucellia viscosa
- Yellow Parilla: Menispermum canadense
- Yellow Passion Fruit Maracuja: Passiflora edulis var. flavicarpa
- Yellow Passionflower: Passiflora lutea
- Yellow Passionfruit: Passiflora edulis var. flavicarpa, Passiflora ligularis
- Yellow Pavonia: Pavonia praemorsa
- Yellow Pea: Lathyrus aphaca
- Yellow Peacock Flower: Caesalpinia lutea
- Yellow Peanut Daylily: Hemerocallis ’Yellow Peanut’
- Yellow Peavine: Lathyrus aphaca
- Yellow Penstemon: Keckiella antirrhinoides, Penstemon confertus
- Yellow Pepper-Grass: Lepidium flavum
- Yellow Pepperweed: Lepidium flavum, Lepidium flavum Torr. var. felipense C.L.Hitchc., Lepidium flavum Torr. var. flavum Torr.
- Yellow Peruvian Chile: Capsicum baccatum ’Aji Yellow’
- Yellow Petticoats Daylily: Hemerocallis ’Yellow Petticoats’
- Yellow Petticoats Rhododendron: Rhododendron x ’Yellow Petticoats’
- Yellow Phacelia: Phacelia lutea
- Yellow Pheasantberry: Leycesteria crocothyrsos
- Yellow Pimperal: Taenidia integerrima
- Yellow Pimpernel: Taenidia integerrima
- Yellow Pimpernell: Taenidia integerrima
- Yellow Pincushion: Chaenactis glabriuscula, Chaenactis glabriuscula DC. var. glabriuscula DC., Chaenactis glabriuscula DC. var. lanosa (DC.) Hall, Chaenactis glabriuscula DC. var. megacephala Gray
- Yellow Pincushion Cactus: Escobaria missouriensis
- Yellow Pincushion Flower: Chaenactis glabriuscula
- Yellow Pincushion-Plant: Navarretia breweri
- Yellow Pine: Pinus echinata, Pinus jeffreyi, Pinus leiophylla Schiede ex Schltdl. & Cham. var. chihuahuana (E
- Yellow Pine Orchid: Gastrochilus japonicus
- Yellow Pineleaf Penstemon: Penstemon pinifolius ’Mersea Yellow’
- Yellow Pinwheel Daylily: Hemerocallis ’Yellow Pinwheel’
- Yellow Pitaya: Selenicereus megalanthus
- Yellow Pitcher Plant: Sarracenia flava
- Yellow Pitcherplant: Sarracenia flava
- Yellow Plainsman: Hymenopappus flavescens
- Yellow Plum Tomato: Lycopersicon lycopersicum ’Yellow Plum’
- Yellow Plume Indian Blanket Gaillardia Pulchella: Gaillardia pulchella ’Yellow Plume’
- Yellow Poinciana: Peltophorum africanum, Peltophorum dubium, Peltophorum pterocarpa, Peltophorum pterocarpum
- Yellow Pond Lily: Nuphar lutea orbiculata, Nuphar luteum, Nuphar luteum macrophyllum var. macrophyllum
- Yellow Pond-Lily: Nuphar lutea, Nuphar lutea advena, Nuphar lutea macrophylla, Nuphar lutea orbiculata, Nuphar lutea polysepala, Nuphar lutea pumila, Nuphar lutea rubrodisca, Nuphar lutea sagittifolia, Nuphar lutea ulvacea, Nuphar lutea variegata
- Yellow Pondlily: Nuphar lutea, Nuphar lutea advena, Nuphar lutea macrophylla, Nuphar lutea sagittifolia
- Yellow Poplar: Liriodendron tulipifera
- Yellow Poppy: Dicranostigma franchetianum, Dicranostigma leptopodum
- Yellow Poui: Tabebuia serratifolia
- Yellow Prairie Flax: Linum sulcatum
- Yellow Prairie Violet: Viola nuttallii, Viola vallicola
- Yellow Prairie-Clover: Dalea flavescens
- Yellow Prickle: Zanthoxylum monophyllum
- Yellow Prickly Pear: Opuntia phaeacantha var. flavescens
- Yellow Prickly-Poppy: Argemone mexicana
- Yellow Pricklypoppy: Argemone mexicana
- Yellow Puccoon: Lithospermum canescens, Lithospermum caroliniense
- Yellow Puff: Neptunia lutea
- Yellow Pussy Ears: Calochortus monophyllus
- Yellow Rabbit-Brush: Chrysothamnus viscidiflorus
- Yellow Rabbitbrush: Chrysothamnus viscidiflorus, Chrysothamnus viscidiflorus lanceolatus, Chrysothamnus viscidiflorus puberulus
- Yellow Rain Lily: Zephyranthes flavissima, Zephyranthes primulina nova
- Yellow Rattle: Rhinanthus minor
- Yellow Rattle-Box: Crotalaria retusa
- Yellow Rattlepod: Crotalaria mitchellii, Crotalaria mitchellii mitchellii
- Yellow Red Hot Poker: Kniphofia citrina
- Yellow Reflection Daylily: Hemerocallis ’Yellow Reflection’
- Yellow Ribbon Arborvitae: Thuja occidentalis ’Yellow Ribbon’
- Yellow Ribbon Daylily: Hemerocallis ’Yellow Ribbon’
- Yellow Ribbons Hosta: Hosta ’Yellow Ribbons’
- Yellow Ripples Daylily: Hemerocallis ’Yellow Ripples’
- Yellow River Hosta: Hosta ’Yellow River’
- Yellow Rock Rose: Halimium calycinum, Halimium lasianthum
- Yellow Rocket: Barbarea vulgaris, Barbarea vulgaris ’Variegata’
- Yellow Rockrose: Halimium lasianthum
- Yellow Root: Xanthorhiza simplicissima
- Yellow Rose of Texas: Kerria japonica ’Pleniflora’, Rosa × harisonii
- Yellow Ruffles Daylily: Hemerocallis ’Yellow Ruffles’
- Yellow Rush-Lily: Tricoryne elatior
- Yellow Sage: Lantana camara
- Yellow Salsify: Tragopogon dubius
- Yellow Sand Verbena: Abronia latifolia
- Yellow Sand-Verbena: Abronia latifolia
- Yellow Sarah Garden Mum: Chrysanthemum ’Yellow Sarah’
- Yellow Satin Daylily: Hemerocallis ’Yellow Satin’
- Yellow Satinwood: Distemonanthus benthamianus
- Yellow Savannah Milkwort: Polygala ramosa
- Yellow Saxifrage: Saxifraga sibthorpii
- Yellow Scabiosa: Scabiosa ochroleuca, Scabiosa ochroleuca ’Lemon Sorbet’
- Yellow Scabiose: Cephalaria alpina
- Yellow Scabious: Cephalaria gigantea
- Yellow Screwstem: Bartonia virginica
- Yellow Scrub Balm: Dicerandra christmanii
- Yellow Sedge: Carex flava, Care
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