External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:15996-2
- Publication
- North American Flora. New York Botanical Garden
- Collation
- 32(4): 268
- Date of Publication
- 21 Dec 1934
- Family as entered in IPNI
- Rubiaceae