Bidens micrantha Gaudich. var. rudimentifera Sherff, Bot. Leafl. 3: 7. 1951.
Type information:
Holotype [F]. W. H. Hatheway and A. Greenwell 465. 24 November 1950. Maui: East Maui, Kahua Crater, south Haleakala.2135m.
=Bidens micrantha subsp. kalealaha