Encycl. 1: 602 (1785)
[Tableau Encyclopedique et Methodique ... Botanique]

1. Tao, C., Taylor, C.M., Lantz, H., Flora of China, vol. 19 (Rubiaceae): 83-85 (2011)
2. Tao, C., Taylor, C.M., Lantz, H., Flora of China, vol. 19 (Rubiaceae): 301-302 (2011)

Synonymous genera:

1. Cyclophyllum Hook.f. (1873)
2. Dondisia DC. (1830)
3. Keetia E. Phillips (1926)
4. Mesoptera Hook.f. (1873)
5. Mitrastigma Harv. (1842)
6. Plectronia L. (1767)
7. Polyozus Lour. (1790)
8. Psydrax Gaertner (1788)