External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:77209713-1
- Publication
- Florae Siamensis enumeratio: a list of the plants known from Siam, with records of their occurrence. Bangkok
- Collation
- 2(2): 171
- Family as entered in IPNI
- Rubiaceae