| Family | subfamily | Genus | Species | |
|---|---|---|---|---|
| Cucurbitaceae | Bryonia L. | Byronia cretica L. | Details | |
| Capparaceae | Cadaba Forssk. | Cadaba farinosa Forssk. | Details | |
| Capparaceae | Cadaba Forssk. | Cadaba glandulosa Forssk. | Details | |
| Capparaceae | Cadaba Forssk. | Cadaba rotundifolia Forssk. | Details | |
| Cruciferae (Brassicaceae) | Cakile Mill. | Cakile maritima Scop. subsp. aegyptiaca (Willd.)Nyman | Details | |
| Gramineae (Poaceae) | Pooideae | Calamagrostis Adans. | Calamagrostis arenaria (L.) Roth | Details |
| Compositae (Asteraceae) | Asteroideae | Calendula L. | Calendula stellata Cav. | Details |
| Polygonaceae | Calligonum L. | Calligonum comosum L.'Her. | Details | |
| Apocynaceae | Asclepiadoideae | Calotropis R.Br. | Calotropis procera (Aiton)W.A.Aiton | Details |
| Campanulaceae | Campanuloideae | Campanula L. | Campanula dimorphantha Schweinf. | Details |
| Campanulaceae | Campanuloideae | Campanula L. | Campanula dulcis Decne. | Details |
| Campanulaceae | Campanuloideae | Campanula L. | Campanula erinus L. | Details |
| Campanulaceae | Campanuloideae | Campanula L. | Campanula sulphurea Boiss. | Details |
| Capparaceae | Capparis L. | Capparis cartilaginea Decne. | Details | |
| Capparaceae | Capparis L. | Capparis orientalis Veill. | Details | |
| Capparaceae | Capparis L. | Capparis sicula Duh.subsp. leucophylla (DC.)Inocencio, D.Rivera, Obón & Alcaraz. | Details | |
| Capparaceae | Capparis L. | Capparis spinosa L. var. spinosa | Details | |
| Capparaceae | Capparis L. | Capparis spinosa var. aegyptia (Lam.) Boiss. | Details | |
| Capparaceae | Capparis L. | Capparis decidua (Forssk,)Edgew, | Details | |
| Cruciferae (Brassicaceae) | Capsella Medik. | Capsella bursa-pastoris (L.)Medik. | Details | |
| Sapindaceae | Cardiospermum L. | Cardiospermum halicacabum L. | Details | |
| Compositae (Asteraceae) | Carduoideae | Carduus L. | Carduus argentatus L. | Details |
| Compositae (Asteraceae) | Carduoideae | Carduus L. | Carduus acanthoides L. | Details |
| Compositae (Asteraceae) | Carduoideae | Carduus L. | Carduus getulus Pomel | Details |
| Compositae (Asteraceae) | Carduoideae | Carduus L. | Carduus pycnocephalus L., subsp. pycnocephalus | Details |
| Cyperaceae | Carex L. | Carex distans L. | Details | |
| Cyperaceae | Carex L. | Carex divisa Huds. | Details | |
| Cyperaceae | Carex L. | Carex extensa Gooden. | Details | |
| Apocynaceae | Rauvolfioideae | Carissa L. | Carissa spinarum L. | Details |
| Compositae (Asteraceae) | Carduoideae | Carlina L. | Carlina involucrata Poir. | Details |
| Amaranthaceae s.l. | Salsoloideae | Caroxylon Thunb. | Caroxylon cyclophyllum (Baker) Akhani & Roalson | Details |
| Amaranthaceae s.l. | Salsoloideae | Caroxylon Thunb. | Caroxylon gaetulum (Maire) Akhani & Roalson | Details |
| Amaranthaceae s.l. | Salsoloideae | Caroxylon Thunb. | Caroxylon imbricatum (Forssk.) Moq. var. imbricata | Details |
| Amaranthaceae s.l. | Salsoloideae | Caroxylon Thunb. | Caroxylon inerme (Forssk.) Akhani & Roalson | Details |
| Amaranthaceae s.l. | Salsoloideae | Caroxylon Thunb. | Caroxylon spinescens (Moq.) Akhani & Roalson | Details |
| Amaranthaceae s.l. | Salsoloideae | Caroxylon Thunb. | Caroxylon tetragonum (Delile) Moq. | Details |
| Amaranthaceae s.l. | Salsoloideae | Caroxylon Thunb. | Caroxylon tetrandrum (Forssk.) Akhani & Roalson | Details |
| Amaranthaceae s.l. | Salsoloideae | Caroxylon Thunb. | Caroxylon vermiculatum (L.) Akhani & Roalson | Details |
| Amaranthaceae s.l. | Salsoloideae | Caroxylon Thunb. | Caroxylon villosum (Schult.) Akhani & Roalson | Details |
| Amaranthaceae s.l. | Salsoloideae | Caroxylon Thunb. | Caroxylon volkensii (Schweinf. & Asch.) Akhani & Roalson | Details |
| Cruciferae (Brassicaceae) | Carrichtera DC. | Carrichtera annua (L.) DC. | Details | |
| Compositae (Asteraceae) | Carduoideae | Carthamus L. | Carthamus eriocephalus (Boiss.) Greuter | Details |
| Compositae (Asteraceae) | Carduoideae | Carthamus L. | Carthamus glaucus M.Bieb., subsp. glaucus | Details |
| Compositae (Asteraceae) | Carduoideae | Carthamus L. | Carthamus lanatus L. | Details |
| Compositae (Asteraceae) | Carduoideae | Carthamus L. | Carthamus mareoticus Delile | Details |
| Compositae (Asteraceae) | Carduoideae | Carthamus L. | Carthamus nitidus Boiss. | Details |
| Compositae (Asteraceae) | Carduoideae | Carthamus L. | Carthamus tenuis (Boiss. & Blanche) Bornm. | Details |
| Gramineae (Poaceae) | Pooideae | Catapodium Link | Catapodium rigidum (L.)C.E.Hubb. | Details |
| Apocynaceae | Asclepiadoideae | Caudanthera Plowes | Caudanthera edulis (Edgew.) Meve & Liede | Details |
| Apocynaceae | Asclepiadoideae | Caudanthera Plowes | Caudanthera sinaica (Decne.) Plowes, | Details |