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CCDB → Angiosperms → Rubiaceae → Knoxia
| Taxon name | Status | Median (n) |
| Knoxia sumatrensis (Retz.) DC. | Accepted | 10 |
| Knoxia corymbosa Willd. | Synonym of Knoxia sumatrensis (Retz.) DC. | 10 |
| Knoxia linearis Gamble | Synonym of Knoxia sumatrensis (Retz.) DC. | 10 |
| Knoxia mollis R. Br. ex Wight & Arn. | Synonym of Knoxia sumatrensis (Retz.) DC. | 10 |