| Family | subfamily | Genus | Species | |
|---|---|---|---|---|
| Compositae (Asteraceae) | Asteroideae | Chiliadenus Cass. | Chiliadenus candicans (Delile) Brullo | Details |
| Compositae (Asteraceae) | Asteroideae | Chiliadenus Cass. | Chiliadenus montanus (Vahl) Brullo | Details |
| Compositae (Asteraceae) | Asteroideae | Chiliadenus Cass. | Chiliadenus sericeus (Batt. & Trab.) Brullo subsp. sericeus | Details |
| Compositae (Asteraceae) | Asteroideae | Chlamydophora Ehrenb. ex Less. | Chlamydophora tridentata (Delile) Ehrenb. ex Less. | Details |
| Gramineae (Poaceae) | Chloridoideae | Chloris Sw. | Chloris flagellifera (Nees) P.M.Peterson | Details |
| Gramineae (Poaceae) | Chloridoideae | Chloris Sw. | Chloris gayana Kunth | Details |
| Gramineae (Poaceae) | Chloridoideae | Chloris Sw. | Chloris prieurii Trin. | Details |
| Gramineae (Poaceae) | Chloridoideae | Chloris Sw. | Chloris pycnothrix Trin. | Details |
| Euphorbiaceae | Acalyphoideae | Chrozophora Neck. ex A.Juss. | Chrozophora brocchiana (Vis.) Schweinf. | Details |
| Euphorbiaceae | Acalyphoideae | Chrozophora Neck. ex A.Juss. | Chrozophora oblongifolia (Delile) A.Juss. ex Spreng. | Details |
| Euphorbiaceae | Acalyphoideae | Chrozophora Neck. ex A.Juss. | Chrozophora tinctoria (L.)A.Juss. | Details |
| Compositae (Asteraceae) | Asteroideae | Chrysanthemum L. | Chrysanthemum indicum L. | Details |
| Gramineae (Poaceae) | Panicoideae | Chrysopogon | Chrysopogon plumulosus Hochst. | Details |
| Compositae (Asteraceae) | Cichorioideae | Cichorium L. | Cichorium pumilum Jacq. | Details |
| Vitaceae | Cissus L. | Cissus quadrangularis L. | Details | |
| Orobanchaceae | Cistanche Hoffmanns & Link | Cistanche phelypaea (L.) Cout. | Details | |
| Orobanchaceae | Cistanche Hoffmanns & Link | Cistanche tubulosa (Schenk) Wight | Details | |
| Cucurbitaceae | Citrullus Schrad. ex Eck. & Zeyh. | Citrullus colocynthis (L)Schrad. | Details | |
| Rutaceae | Citrus | Citrus aurantifolia Swingle | Details | |
| Rutaceae Juss. | Citrus L. | Citrus aurantium L. | Details | |
| Rutaceae | Citrus | Citrus limietta Risso | Details | |
| Rutaceae | Citrus | Citrus limonia Burm. F. | Details | |
| Rutaceae | Citrus (Burm.) Merr. | Citrus maxima (Burm.) Merr. | Details | |
| Rutaceae | Citrus | Citrus reticulata Blance | Details | |
| Rutaceae | Please Select | Citrus sinensis Osbeck | Details | |
| Compositae (Asteraceae) | Asteroideae | Cladanthus Cass. | Cladanthus mixtus (L.) Chevall. | Details |
| Cyperaceae | Cladium Browne | Cladium mariscus (L.) Pohl | Details | |
| Cleomaceae | Cleome L. | Cleome amblyocarpa Barratte & Murb. | Details | |
| Cleomaceae | Cleome L. | Cleome brachycarpa DC. | Details | |
| Cleomaceae | Cleome L. | Cleome chrysantha Decne. | Details | |
| Cleomaceae | Cleome L. | Cleome droserifolia (Forssk.) Delile | Details | |
| Cleomaceae | Cleome L. | Cleome gynandra L. | Details | |
| Cleomaceae | Cleome L. | Cleome hanburyana Penz. | Details | |
| Cleomaceae | Cleome L. | Cleome pallida Kotschy | Details | |
| Cleomaceae | Cleome L. | Cleome paradoxa R.Br. ex DC. | Details | |
| Cleomaceae | Cleome L. | Cleome scaposa DC. | Details | |
| Cleomaceae | Cleome L. | Cleome viscosa L. | Details | |
| Cleomaceae | Cleome L. | Cleome arabica L | Details | |
| Lamiaceae (Labiatae) | Nepetoideae | Clinopodium L. | Clinopodium barbatum (P.H.Davis) Melnikov | Details |
| Cruciferae (Brassicaceae) | Clypeola L. | Clypeola jonthlaspi L. | Details | |
| Cucurbitaceae | Coccinia Wight & Arn. | Coccinia abyssinica (Lam.) Cogn. | Details | |
| Cucurbitaceae | Coccinia Wight & Arn. | Coccinia grandis (L.)Voiget | Details | |
| Menispermaceae | Cocculus DC. | Cocculus pendulus (J.R.Forst.)Diels | Details | |
| Gramineae (Poaceae) | Chloridoideae | Coelachyrum Hochst. & Nees | Coelachyrum brevifolium Hochst. & Nees | Details |
| Cruciferae (Brassicaceae) | Coincya Rouy | Coincya tournefortii (Gouan) Alcaraz, T.E.Díaz, Rivas Mart. & Sánchez-Gómez | Details | |
| Gramineae (Poaceae) | Panicoideae | Coix L. | Coix lacryma-jobi L. | Details |
| Colchicaceae | Colchicum L. | Colchicum gussfeldtianum Asch. & Schweinf. | Details | |
| Colchicaceae | Colchicum L. | Colchicum palaestinum (Baker) C.Archer | Details | |
| Colchicaceae | Colchicum L. | Colchicum ritchii R.Br. | Details | |
| Colchicaceae | Colchicum L. | Colchicum schimperi Janka ex Stef. | Details |