Miller, Scott E./Staples, George W. 2003. Begonia fusca (Begoniaceae), a new naturalized species for Hawai‘i. In: Evenhuis, Neal L. and Eldredge, Lucius G., eds. Records of the Hawaii Biological Survey for 2001-2002. Part 2: Notes. Bishop Museum Occasional Papers. 74:22-23.
Online details: http://hbs.bishopmuseum.org/pdf/op74.pdf