Houstonia coerulea var. toxonorum Stevens
, Ill. Guide Fl. Pl. 582 (1910).
External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:124275-2
- Publication
- An Illustrated Guide to the Flowering Plants of the Middle Atlantic and New England States
- Collation
- 582
- Family as entered in IPNI
- Rubiaceae