Bidens ferax O. Deg. & Sherff , in Sherff, Bot. Gaz. (Crawfordsville) 94: 590. 1933.
Type information:
Holotype [F]. O. Degener , K.K. Park and K. Nitta & P. Westgate 4117. 23 March 1932. O`ahu: dry grassy slope 1/4 mi from shore on S side of Kea`au Valley. Isotype(s) [BM, GH, K, M].
=Bidens cervicata