External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:77246809-1
- Publication
- Synoptical Flora of North America. New York
- Collation
- 1(2): 34
- Date of Publication
- (1884)
- Family as entered in IPNI
- Rubiaceae