Sandwith 1931 - Sandwith NY (1931) Contributions to the Flora of Tropical America. VI. New and Noteworthy Species from British Guiana, Dilleniaceae-Connaraceae. Bulletin of Miscellaneous Information (Royal Gardens, Kew) 1931(4): 170. doi: 10.2307/4102573.
There is no corrections for Quiina indigofera yet.