Bidens micrantha Gaudich. , Voy. Freycinet Bot. 464, pl. 85. 1826.
Type information:
Holotype [P]. C. Gaudichaud-Beaupré 71. 1817- 1820. O`ahu: s.l.. Isotype(s) [G-DEL!].

Note: The type must have come from Maui. It is in very poor shape but definitely has curved, awnless achenes. For discussion of date of publ. see St. John (Taxon 34: 663-5. 1985).

=Bidens micrantha subsp. micrantha
Note: The type must have come from Maui. It is in very poor shape but definitely has curved, awnless achenes. For discussion of date of publ. see St. John (Taxon 34: 663-5. 1985).

*Verification: None.

Bidens micrantha Gaudich. subsp. ctenophylla (Sherff) Nagata & Ganders, Lyonia 2: 11. 1983. Flora of the Hawaiian Islands --Basionym
Type Information
Bidens ctenophylla Sherff , Bot. Gaz. (Crawfordsville) 85: 5 1928.
Hawai`i: between Pu`uwa`awa`a and Hu`ehu`e, arid weed-covered `a`a slopes. 22 August 1926. O. Degener and H. Wiebke 2128.
Holotype [F]. Isotype(s) [B [PD], BISH!, BM, F, HAW, K, P].
=Bidens micrantha subsp. ctenophylla

*Verification: R.K. Shannon.
---------------------


*Verification: D.M. Mix.

Bidens micrantha Gaudich. subsp. kalealaha Nagata & Ganders, Lyonia 2: 6. 1983.
Type information:
Holotype [BISH]. R. Hobdy 959. 18 December 1980. Maui: East Maui, Kahikinui, on sheer cliff in Manawainui Gulch out of the reach of goats.1920m.
=Bidens micrantha subsp. kalealaha

*Verification: None.

Bidens micrantha Gaudich. var. caduca (Sherff) Sherff, Amer. J. Bot. 22: 705. 1935. Flora of the Hawaiian Islands --Basionym
Type Information
Bidens sandvicensis Less. var. caduca Sherff, Bot. Gaz. (Crawfordsville) 85: 7 1928.
Moloka`i: s.l.. 1851- 1871. W. Hillebrand s.n..
Holotype [B].

Note: Holotype presumably destroyed. Photo of holotype, negative no. 49756 (F) seen. Holotype was only known collection.

=Bidens micrantha subsp. micrantha
*Verification: None.
---------------------


*Verification: R.K. Shannon.

Bidens micrantha Gaudich. var. heterophylla (A. Gray) Sherff, Brittonia 6: 339. 1948. Flora of the Hawaiian Islands --Basionym
Type Information
Bidens sandvicensis Less. var. heterophylla A. Gray, Proc. Amer. Acad. Arts 5: 128 1861.
Hawai`i: s.l.. 1851 1855. J. Rémy 281.
Holotype [GH].
=Bidens micrantha subsp. ctenophylla

*Verification: None.
---------------------


*Verification: D.M. Mix.

Bidens micrantha Gaudich. var. kaalana Sherff, Bot. Gaz. (Crawfordsville) 85: 8. 1928.
Type information:
Holotype [B]. W. Hillebrand s.n.. O`ahu: Wai`anae Range.

Note: Holotype presumably destroyed. Photo of holotype, negative no. 2512, at F seen.

=Bidens torta
Note: Holotype presumably destroyed. Photo of holotype, negative no. 2512, at F seen.

*Verification: None.

Bidens micrantha Gaudich. var. laciniata (Hillebr.) Sherff, Bot. Gaz. (Crawfordsville) 85: 8. 1928. Flora of the Hawaiian Islands --Basionym
Type Information
Campylotheca micrantha (Gaudich.) Cass. var. laciniata Hillebr., Fl. Hawaiian Isl. 216 1888.
Maui: Kula. 1851- 1871. W. Hillebrand s.n..
Lectotype [BISH].

Note: Lectotype to be designated.

=Bidens micrantha subsp. micrantha
*Verification: None.
---------------------


*Verification: D.M. Mix.

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

*Verification: None.