| Coreopsis reptans L., 1759 |
| Coreopsis rhyacophila Greenm., 1900 |
| Coreopsis rudis (Benth.) Benth. & Hook. f. ex Hemsl., 1881 |
| Coreopsis scandens Sessé & Moc., 1890 |
| Coreopsis schaffneri A. Gray, 1883 |
| Coreopsis serrulata Poir., 1811 |
| Coreopsis teotepecensis Paray, 1958 |
| Coreopsis tetragona Cerv. ex La Llave & Lex., 1824 |
| Coreopsis tinctoria Nutt., 1821 |
| Coreopsis trichosperma Michx., 1803 |
| Coreopsis trichosperma var. aurea (Aiton) Nutt., 1818 |
| Corethrogyne DC., 1836 |
| Corethrogyne brevicula Greene, 1910 |
| Corethrogyne caespitosa Greene, 1897 |
| Corethrogyne filaginifolia (Hook. & Arn.) Nutt., 1840 |
| Corethrogyne filaginifolia var. virgata (Benth.) A. Gray, 1876 |
| Corethrogyne virgata Benth., 1844 |
| Coronocarpus Schumach., 1827 |
| Correllia A.M. Powell, 1973 |
| Correllia montana A.M. Powell, 1973 |