Cuphea 'David Verity' Cuphea 'Flamenco Samba'
Cuphea 'Twinkle Pink' Cuphea hyssopifola
Cuphea ignea Cuphea lanceolata
Cuphea llavea Cuphea micropetala
Curcuma alismatifolia Curcuma australasica
Curcuma elata Curcuma longa
Curcuma petiolata Curcuma petiolata 'Emperor'
Curcuma roscoeana Curcuma roscoeana 'White Flame'
Curcuma sumatrana Curcuma thorellii
Curcuma zedoaria Cyanastrum cordifolium var. compactum
Cyclamen coum Cyclamen hederifolium
Cyclamen hederifolium 'Silver Form' Cyclamen persicum
Cyclamen persicum 'Carmen' Cymbidium x
Cymbidium x 'Levis Duke Bella Vista' Cymbidium x 'Mary Bea'
Cymbopogon citratus Cynara cardunculus
Cynara scolymus Cynara scolymus 'Imperial Star'
Cynara scolymus 'Large Green Globe' 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 Cyrtanthus spiralis
Cyrtomium falcatum 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
Dalea purpurea Darlingtonia californica
Darmera peltata 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 Delosperma 'Alba'
Delosperma 'Mesa Verde' Delosperma brunnthaleri 'Pink'
Delosperma brunnthaleri 'Yellow' Delosperma cooperi
Delosperma floribundum 'Starburst' Delosperma herbeau
Delosperma lavisiae Delosperma lehmannii
Delosperma nubigerum Delosperma parleum