Psychotria hexandra H. Mann f. forbesii Fosberg, Brittonia 16: 263 1964.
O`ahu, Ko`olau Mts., Wahiawa gulches, [between Wahiawa and the Head Gate House]. 9 April 1911. Forbes 1702.O.
Holotype
[BISH]. Isotype(s)
[BISH! [2], K, US!].
Psychotria hexandra H. Mann f. hosakana Fosberg, Brittonia 16: 262 1964.
O`ahu, Ko`olau Mts., Waipi`o, Kipapa Gulch, wet forest at bottom of gulch. 600 m. 7 August 1933. Fosberg 9759.
Holotype
[BISH]. Isotype(s)
[A, F, P, US!].
Psychotria hexandra H. Mann f. waialuana Fosberg, Brittonia 16: 260 1964.
Kaua`i, Waialua Mts., Pole Line Trail. Lydgate s.n..
Holotype
[BISH].
Psychotria hexandra H. Mann subsp. oahuensis O. Deg. & Fosberg, in Fosberg, Brittonia 16: 261 1964.
O`ahu, Ko`olau Mts., divide between Punalu`u and Kaluanui, Castle Trail, wet forest. 675 m. 25 April 1937. Fosberg and Fosberg 13747.
Holotype
[BISH]. Isotype(s)
[A].
Psychotria hexandra H. Mann var. hirta Wawra, Flora 57: 329 1874.
Kaua`i, mountain forests of Halemanu. 1869- 1870. Wawra 2194.
Lectotype
[W]. Isolectotype(s)
[W].
Psychotria hexandra H. Mann var. hosakana Fosberg, Brittonia 16: 262 1964.
O`ahu, Ko`olau Mts., Waipi`o, Kipapa Gulch, wet forest at bottom of gulch. 600 m. 7 August 1933. Fosberg 9759.
Holotype
[BISH]. Isotype(s)
[A, F, P, US!].
Psychotria hexandra H. Mann var. kealiae Fosberg, Brittonia 16: 260 1964.
Kaua`i, Kealia. 1864- 1865. Mann and Brigham 564.
Holotype
[BISH]. Isotype(s)
[BISH!, GH, K, NY, US].
Psychotria hexandra H. Mann var. oahuensis O. Deg. & Fosberg, in Fosberg, Brittonia 16: 261 1964.
O`ahu, Ko`olau Mts., divide between Punalu`u and Kaluanui, Castle Trail, wet forest. 675 m. 25 April 1937. Fosberg and Fosberg 13747.
Holotype
[BISH]. Isotype(s)
[A].
Psychotria hexandra H. Mann var. rockii Fosberg, Brittonia 16: 262 1964.
O`ahu, Manoa Trail. November 1913. Rock s.n..
Holotype
[GH].
Psychotria hexandra H. Mann var. st.-johnii Fosberg, Brittonia 16: 262 1964.
O`ahu, foot of Pali. 7 October 1908. Forbes s.n..
Holotype
[BISH].