| Cojoba tenella Britton & Rose, 1928 |
| Cojoba tuerckheimii Britton & Rose, 1928 |
| Cojoba undulatomarginata L. Rico, 1991 |
| Colinil Adans., 1763 |
| Colinil cinereum (L.) C.H. Hitchc., 1893 |
| Cologania Kunth, 1824 |
| Cologania angustifolia Kunth, 1824 |
| Cologania biloba (Lindl.) G. Nicholson, 1887 |
| Cologania broussonetii (Balb.) DC., 1825 |
| Cologania capitata Rose, 1903 |
| Cologania congesta Rose, 1905 |
| Cologania cordata Fearing ex McVaugh, 1987 |
| Cologania erecta Rose, 1897 |
| Cologania glabrior Rose, 1903 |
| Cologania grandiflora Rose, 1903 |
| Cologania hintoniorum B.L. Turner, 1992 |
| Cologania hirta (M. Martens & Galeotti) Rose, 1895 |
| Cologania humifusa Hemsl., 1880 |
| Cologania humilis Rose, 1903 |
| Cologania intermedia Kunth, 1823 |