Bidens halawana O. Deg. & Sherff , in Sherff, Bot. Gaz. (Crawfordsville) 94: 589. 1933.
Type information:
Holotype [F]. O. Degener , K.K. Park and Y. Nitta, & W. Bush 4133. 17 April 1932. O`ahu: N slope of South Halawa Gulch, ca. 1 mi from top of Ko`olau Range, on partly forested lateral ridge. Isotype(s) [B [PD], BM, F, GH, K, MO!, NY [mfc!]].
=Bidens asymmetrica