| Apocynaceae | |
Cycladenia humilis
| Benth. | Pl. Hartw. 323 | 1849 |
| Apocynaceae | |
Cycladenia jonesii
| Eastw. | Leafl. W. Bot. 3(7): 159–160 | 1942 |
| Apocynaceae | |
Cycladenia tomentosa
| A. Gray | Bot. California 1: 474 | 1876 |
| Apocynaceae | |
Cycladenia venusta
| Eastw. | Bull. Torrey Bot. Club 29(2): 77 | 1902 |