Psychotria hexandra H. Mann f. forbesii Fosberg, Brittonia 16: 263. 1964.
Type information:
Holotype [BISH]. C.N. Forbes 1702.O. 9 April 1911. O`ahu: Ko`olau Mts., Wahiawa gulches, [between Wahiawa and the Head Gate House]. Isotype(s) [BISH! [2], K, US!].

Note: Sohmer (1977, p. 124) erroneously states that the holotype is at US.

=Psychotria hexandra var. oahuensis
Note: Sohmer (1977, p. 124) erroneously states that the holotype is at US.

*Verification: Sohmer, S.H. 1977. Lyonia 1:103-186.