Cyperus hillebrandii Boeck. , Flora 63: 436. 1880.
Type information:
Holotype [B]. W. Hillebrand s.n.. 1851- 1871. Maui: S slopes of Haleakala. Isotype(s) [MEL [photo BISH!]].
=Cyperus hillebrandii var. hillebrandii

*Verification: W.L. Wagner, D.M. Mix.

Cyperus hillebrandii Boeck. var. decipiens (Hillebr.) Kük., Pflanzenr. IV. 20 (Heft 101, 4): 484. 1936. Flora of the Hawaiian Islands --Basionym
Type Information
Cyperus decipiens Hillebr. , Fl. Hawaiian Isl. 467 1888.
Maui: or Moloka`i, s.l.. 1851- 1871. W. Hillebrand s.n..
Holotype [B].

Note: "Only one specimen, collected on Maui or Moloka`i!"

=Cyperus hillebrandii var. decipiens
*Verification: W.L. Wagner, D.M. Mix.
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*Verification: W.L. Wagner, D.M. Mix.

Cyperus hillebrandii Boeck. var. helleri Kük., Pflanzenr. IV. 20 (Heft 101, 4): 484. 1936.
Type information:
Lectotype [NY]. A.A. Heller 2363. 29 October 1895. O`ahu: [Nu`uanu] Pali.
Lectotypified in W. L. Wagner & R. K. Shannon. Brittonia 51: 430. 1999. Isolectotype(s) [GH, MO, US!].

Note: Kukenthal did not cite a date, and Heller did not cite this collection. Since the type at B was destroyed, we are here selecting a lectotype from among the available syntypes. Additional syntype: same locality on 24 May (US).

=Cyperus hillebrandii var. hillebrandii
Note: Kukenthal did not cite a date, and Heller did not cite this collection. Since the type at B was destroyed, we are here selecting a lectotype from among the available syntypes. Additional syntype: same locality on 24 May (US).

*Verification: Wagner, W.L. & R.K. Shannon. 1999. Brittonia 51:422-438.

Cyperus hillebrandii Boeck. var. mauiensis (Hillebr.) Kük., Pflanzenr. IV. 20 (Heft 101, 4): 484. 1936. Flora of the Hawaiian Islands --Basionym
Type Information
Cyperus mauiensis Hillebr. , Fl. Hawaiian Isl. 469 1888.
Maui: Haiku. 1851- 1871. W. Hillebrand s.n..
Holotype [B].
=Cyperus hillebrandii var. hillebrandii

*Verification: W.L. Wagner, D.M. Mix.
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*Verification: W.L. Wagner, D.M. Mix.