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CCDB → Angiosperms → Rubiaceae → Exostema
| Taxon name | Status | Median (n) |
| Exostema lineatum (Vahl) Schult. | Accepted | None |
| Exostema longiflorum (Lamb.) Schult. | Accepted | 13 |
| Exostema myrtifolium Griseb. | Accepted | 13 |
| Exostema nitens Urb. | Accepted | 13 |
| Exostema subcordatum K. E. Urb. | Synonym of Exostema subcordatum Krug & Urb. | 11 |