Wagner, Warren L./Shannon, Robynn K./Herbst, Derral R. 1997. Contributions to the flora of Hawai‘i. In: Evenhuis, Neal L. and Miller, Scott, E., eds. Records of the Hawaii Biological Survey for 1996. Part 1: Articles. Bishop Museum Occasional Papers. 48:51-65.
Online details: http://hbs.bishopmuseum.org/pdf/wagner-etal97.pdf