Corryocactus
Cortaderia
Cortusa
Corylopsis
Corypha
Coryphantha
Costus
Cotinus
Cotoneaster
Cotula
Cowania
Crambe
Craspedia
Crassula
Crataegus
Crepis
Crinodendron

Crinum
Criptoméria
Crocosmia
Crocus
Crossandra
Crotalaria
Crowea
Cryptanthus
Cryptocoryne
Ctenanthe
Cunninghamia
Cunonia
Cuphea
Cupressus
Curcuma
Cyananthus
Cyanotis

Cyathodes
Cyclamen
Cycnoches
Cydonia
Cymbalaria
Cymbidium
Cynara
Cynoglossum
Cypella
Cyperus
Cyphomandra
Cyphostemma
Cypripedium
Cyrilla
Cyrtanthus
Cyrtostachys
Cytisus

Daboecia
Dacrydium
Dactylis
Dactylorhiza
Dahlia
Dalea
Damasonium
Darmera
Dasylirion
Decaisnea
Decumaria
Deinanthe
Delosperma
Delphinium
Dendrobium