Psychotria costata Standl., Publ. Field Mus. Nat. Hist., Bot. Ser. 7: 305 (1931). BHL
External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- Publications of the Field Museum of Natural History. Botanical series. Chicago, IL.
- 7: 305
- Family as entered in IPNI