Sandwith 1939 - Sandwith NY (1939) Contributions to the Flora of Tropical America: XXXIX. Results of a Recent Collecting Expedition to British Guiana. Bulletin of Miscellaneous Information (Royal Gardens, Kew) 1939(1): 3. doi: 10.2307/4118235.
There is no corrections for Psittacanthus lasianthus yet.