| Cologania pulchella Kunth, 1823 |
| Cologania pulchella var. racemosa (B.L. Rob.) Rose, 1894 |
| Cologania racemosa (B.L. Rob.) Rose, 1903 |
| Cologania rufescens Rose, 1903 |
| Cologania scandens Rose, 1903 |
| Cologania tenuis Rose, 1906 |
| Colutea L., 1753 |
| Colutea americana Mill., 1768 |
| Colutea frutescens L., 1753 |
| Condylostylis Piper, 1926 |
| Condylostylis candida (Vell.) A. Delgado, 2011 |
| Conzattia Rose, 1909 |
| Conzattia arborea Rose, 1909 |
| Conzattia chiapensis Miranda, 1951 |
| Conzattia multiflora (B.L. Rob.) Standl., 1922 |
| Conzattia sericea Standl., 1922 |
| Corallodendron Mill., 1754 |
| Corallodendron americanum (Mill.) Kuntze, 1891 |
| Corallodendron breviflorum Millsp., 1891 |
| Corallodendron crista-galli (L.) Kuntze, 1891 |