Wikstroemia macrosiphon Skottsb. , Acta Regiae Soc. Sic. Litt. Gothob., Bot. 1: 70. 1972.
Type information:
Holotype [S]. O. Degener 10344. 7 September 1931. O`ahu: Wai`anae Mts., first large side-valley on S of Makua Valley. Isotype(s) [B, BISH, NY?].
=Wikstroemia oahuensis var. oahuensis

*Verification: None.