Cynodon dactylon 'Austrailia' Cynodon dactylon 'Santa Ana'
Cynodon dactylon 'Sundial' Cyperus albostriatus 'Variegatus'
Cyperus alternifolius Cyperus esculentus
Cyperus haspan Cyperus papyrus
Cyperus papyrus 'Graceful Grasses™ King Tut®' Cyphomandra crassicaulis
Cyphostemma juttae Cypripedium acaule
Cypripedium calceolus Cypripedium reginae
Cyrilla arida Cyrilla racemiflora
Cyrtanthus spiralis Cyrtomium falcatum
Cyrtostachys lakka Cytisus purgans
Cytisus scoparius Dacrydium cupressinum
Dahlia Dahlia 'Big Hummer'
Dahlia 'Bishop of Llandaff' Dahlia 'Bloodstone'
Dahlia 'Border Princess' Dahlia 'Camano Choice'
Dahlia 'Caruso White' Dahlia 'Elise Huston'
Dahlia 'Ferncliff Flamingo' Dahlia 'Figaro Improved'
Dahlia 'Hamilton Lillian' Dahlia 'Harlequin Mix'
Dahlia 'Harvest Amanda' Dahlia 'Mystic Illusion'
Dahlia 'Paratola Sunrise' Dahlia 'Red Pygmy'
Dahlia 'Red Riding Hood' Dahlia 'Redskin'
Dahlia 'Rigoletto' Dahlia 'Thomas Edison'
Dahlia 'Yellow Hammer' Dahlia x hybrida
Dahlia imperialis Dalbergia sissoo
Dalea capitata Dalea greggii
Dalea purpurea Dalea schottii
Dalea spinosa Dalechampia dioscoreifolia
Danae racemosa Daphne 'Lawrence Crocker'
Daphne bholua Daphne bholua 'Jacqueline Postill'
Daphne x burkwoodii 'Briggs Moonlight' Daphne x burkwoodii 'Carol Mackie'
Daphne x burkwoodii 'G.K. Argles' Daphne x burkwoodii 'Somerset'
Daphne caucasica Daphne cneorum 'Ruby Glow'
Daphne genkwa Daphne houtteana
Daphne laureola Daphne mezereum
Daphne odora Daphne odora 'Aureo Marginata'
Daphne sericea Daphne x transatlantica 'Blafra (Eternal Fragrance)'
Daphne x transatlantica 'Summer Ice' Daphniphyllum humile
Daphniphyllum macropodum Darlingtonia californica
Darmera peltata Darwinia lejostyla x macrostegia
Darwinia macrostegia Darwinia macrostegia x meeboldii
Darwinia oxylepis Darwinia taxifolia ssp. macrolaena
Dasylirion glaucophyllum Dasylirion longiformis
Dasylirion longissimum Dasylirion wheeleri
Dasyphyllum spp. Datura 'Ballerina Mix'
Datura metel Datura metel 'Cornucopaea'
Datura metel 'Flore Pleno' Datura stramonium
Datura wrightii Daucus carota
Daucus carota 'Purple Haze' Davallia canariensis
Davallia fejeensis Davallia mariesii
Davidia involucrata Deckenia nobilis
Decumaria barbara Delonix regia