- Cananga odorata
- Canna edulis
- Cannabis sativa
- Capparis spinosa
- Capsicum annuum
- Cardueae
- Carica papaya
- Carissa grandiflora
- Carthamus tinctorius
- Carum carvi
- Carya illinoensis
- Casimiroa edulis
- Castanea sativa
- Catha edulis
- Ceiba pentandra
- Chrysanthemum cinerariaefolium
- Cicer arietinum
- Cichorium endivia
- Cichorium intybus
- Cinchona sp.
- Cinnamomum zeylanicum
- Citrullus vulgaris
- Citrus aurantifolia
- Citrus aurantium
- Citrus grandis
- Citrus limon
- Citrus medica
- Citrus paradisi
- Citrus reticulata
- Citrus sinensis
- Citrus sp.
- Cocos nucifera
- Coffea arabica
- Coix lachryma-jobi
- Cola nitida
- Colocasia esculenta
- Copernicia cerifera
- Corchorus capsularis
- Coriandrum sativum
- Corylus avellana
- Crescentia cujete
- Crocus sativus
- Crotalaria juncea
- Cucumis melo
- Cucumis sativus
- Cucurbita sp.
- Curcuma domestica
- Cyamopsis tetragonoloba
- Cydonia vulgaris
- Cymbopogon sp.