| Cotoneaster frigidus |
Tree Cotoneaster |
| Cotoneaster microphyllus |
Small-Leaved Cotoneaster; Rockspray Cotoneaster |
| Crassostrea virginica |
American Cupped Oyster; |
| Crassula ovata |
Kerky-Bush; Jade Plant; Pink Joy |
| Crescentia cujete |
Calabash |
| Crinum amabile |
Giant Spider Lily |
| Crinum asiaticum |
Tree Crinum; Poison Bulb; St. John's Lily |
| Crinum erubescens |
Giant Lily; Essequibo Lily |
| Crinum moorei |
Longneck Swamp Lily; Natal Lily |
| Crinum powellii |
Powell's Swamp Lily |
| Crocosmia crocosmiiflora |
Montbretia |
| Crotalaria retusa |
Rattle Box; Rattlebox |
| Croton discolor |
Yellowish Croton |
| Croton monanthogynus |
Single Fruited Croton |
| Cryptoblabes gnidiella |
Christmas Berry Webworm |
| Cryptographis nitidalis |
Pickleworm |
| Cryptolaemus montrouzieri |
|
| Cryptolestes ferrugineus |
Rusty Grain Beetle |
| Cryptomeria japonica |
Japanese Cedar |
| Cryptostegia grandiflora |
Large Flower Rubber Vine; Large-Flowered Rubber Vine; Veinte De Julio |
| Cryptostegia madagascariensis |
Madagascar Rubber Vine |
| Cryptotermes brevis |
|
| Cryptotermes cavifrons |
|
| Ctenitis sloanei |
Florida Tree Fern |
| Ctenocephalides felis |
Cat Flea |
| Cucumis melo |
Musk Melon |
| Cucumis sativus |
Garden Cucumber; Cucumber |
| Cucurbita maxima |
Winter Squash; Squash |
| Cucurbita moschata |
Crookneck Squash |
| Cucurbita pepo |
Field Pumpkin; Pumpkin |
