Clivia spp.
Cnidoscolus aconitifolius
Chaya
Cochlearia danica
Danish Scurvygrass
Cochlearia officinalis
Common Scurvygrass
Cochlearia officinalis agg
Common Scurvygrass
Cochlearia officinalis agg.
Scurvygrass
Cocos nucifera
Coconut
Codiaenum variegatum
Fire Croton
Coeloglossum viride
Frog Orchid
Colchicum autumnale
Meadow Saffron
Coleus amboinicus
Cuban Oregano
Coleus decurrens
Coleus
Coleus scutellarioides
Coleus
Colobanthus quitensis
Antarctic pearlwort
Comarum palustre
Marsh Cinquefoil
Conium maculatum
Hemlock
Conocarpus erectus
Buttonwood
Conocarpus lancifolius
Qalab
Conopodium majus
Pignut
Convallaria majalis
Lily-of-the-valley
Convolvulus arvensis
Field Bindweed
Cordyline australis
Cabbage-palm
Cordyline fruticosa
Ti Plant
Coreopsis lanceolata
Lanceleaf Coreopsis
Cornus capitata
Bentham's Dogwood
Corrigiola litoralis
Strapwort
Cosmos Sulphureus
Sulfur Cosmos
Costus dubius
Spiral Flag
Costus elegans
Stepladder Ginger
Costus spiralis
Cotoneaster cambricus
Wild Cotoneaster
Cotoneaster franchetii
Franchet's Cotoneaster
Cotoneaster integrifolius
Entire-leaved Cotoneaster
Couroupita guianensis
Cannonball tree
Crambe maritima
Sea-kale
Crassocephalum crepidioides
Redflower Ragleaf
Crassula helmsii
New Zealand Pigmyweed
Crataegus laevigata
Midland Hawthorn
Crataegus monogyna
Hawthorn
Crataegus rhipidophylla
Crateva religiosa
Sacred Garlic Pear
Crepis capillaris
Smooth Hawk's-beard
Crepis foetida
Stinking Hawk's-beard
Crepis vesicaria
Beaked Hawk's-beard
Crithmum maritimum
Rock Samphire
Crocosmia x crocosmiiflora
Montbretia
Crocus laevigatus
Crocus (laevigatus)
Crocus neapolitanus
Spring Crocus
Crocus nudiflorus
Autumn Crocus
Crocus tommasinianus
Early Crocus
Crocus x luteus
Yellow Crocus
Crossostephium chinense
Chinese Wormwood
Cruciata laevipes
Crosswort
Cryptogramma crispa
Parsley Fern
Cryptomeria japonica
Japanese Red-cedar
Cucumis sativus
Cucumber
Cupressus nootkatensis
Nootka Cypress
Cuscuta epithymum
Dodder
Cuscuta europaea
Greater Dodder
Cyathea arborea
West Indian Treefern
Cycas circinalis
Queen Sago
Cycas revoluta
Sago Palm
Cydonia oblonga
Quince
Cymbalaria muralis
Ivy-leaved Toadflax
Cymbopogon citratus
West Indian Lemon Grass
Cynara cardunculus
Cardoon
Cynoglossum officinale
Hound's-tongue
Cynosurus cristatus
Crested Dog's-tail
Cyperus alternifolius
Cyperus fuscus
Brown Galingale