| Calamondine | x Citrofortunella |
| Campecheholz | Haemataxylum |
| Cardonenbete | Beta |
| Cardy | Cynara |
| Cassava | Manihot |
| Catawissazwiebel | Allium |
| Catjangbohne | Vigna |
| Cayennepfeffer | Capsicum |
| Cearakautschukbaum | Manihot |
| Ceylonkardamome | Elettaria |
| Ceylonzimtbaum | Cinnamomum |
| Chabaudnelken | Dianthus |
| Champaka | Michelia |
| Chayote | Sechium |
| Cherimoya | Annona |
| Chicasapflaume | Prunus |
| Chicoree | Cichdrium |
| Chileerdbeere | Fragaria |
| Chillies | Capsicum |
| Chinakohl | Brassica |
| Chinaradies | Raphanus |
| Chinarindenbaum | Cinchona |
| Chinaschilf | Miscanthus |
| Chinawurzel | Smilax |
| Chincherinchee | Ornithogalum |
| Chinese kale | Brassica |
| Chinesenprimel | Primula |
| Chinese radish | Raphanus |
| Chomelken | Dianthus |
| Christdorn | Paliurus |
| Christophskraut | Actaea |
| Christrose | Helleborus |
| Christusdorn | Euphorbia |
| Chufa | Cypirus |
| Colossea-Primeln | Primula |
| Copaibobalsam | Copaifera |
| Cranberry | Vaccinium |
| Croton | Codiaeum |
| Curuba | Passiflora |