Bidens setosa Sherff , Bot. Gaz. (Crawfordsville) 70: 103. 1920.
Type information:
Holotype [BISH]. C.N. Forbes 811.K. 3-18 July-August 1917. Kaua`i: Waimea Drainage Basin, west side. Isotype(s) [BISH! [2], F].

Note: The specimen labels give the date as "July 3 to August 18," but Forbes's field book gives the date as July 7 to August 18.

=Bidens sandvicensis subsp. sandvicensis
Note: The specimen labels give the date as "July 3 to August 18," but Forbes's field book gives the date as July 7 to August 18.

*Verification: R.K. Shannon.