Type Information
Dubautia knudsenii Hillebr. , Fl. Hawaiian Isl. 223 1888.
Kaua`i, on the mountains of Waimea or at Halemanu. Knudsen s.n..
Lectotype [B]. Lectotypified in Sherff. Bernice P. Bishop Mus. Bull. 135: 104. 1935.
Note: Lectotype: fragment BISH!, photos BISH!, F! If the original set of Hillebrand's specimens is taken to have been at B, then the BISH specimen is a fragment of the holotype, rather than the fragment of the lectotype WLW, 1/95).
*Verification: None.
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Dubautia knudsenii Hillebr. subsp. filiformis G.D. Carr, Allertonia 4: 84 1985.
Kaua`i, Kekoiki Ridge, above Kilauea, rain forest. 850 m. 13 February 1927. MacDaniels 672.
Holotype [BISH]. Isotype(s) [US!].

*Verification: R.K. Shannon.
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Dubautia knudsenii Hillebr. subsp. nagatae (H. St. John) G.D. Carr, Allertonia 4: 83 1985.

*Verification: R.K. Shannon.
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Dubautia knudsenii Hillebr. var. degeneri Sherff, Bot. Gaz. (Crawfordsville) 96: 151 1934.
Moloka`i, [northeastern Moloka`i], N of Pepe'opae bog, open rain forest. 8 May 1928. Degener 4259.
Holotype [F]. Isotype(s) [NY [mfc!]].

Note: There are three sheets of Degener et al. 4259 at US that are all collections of Bidens populifolia, collected 6 Nov. 1932 (one sheet has date of 1933).
*Verification: R.K. Shannon.
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