Wikstroemia caumii Skottsb. , Acta Horti Gothob. 10: 144. 1936.
Type information:
Holotype [GB]. C. Skottsberg 841. 18 October 1922. Maui: East Maui, Haleakala, along Olinda-Waikamoi Pipeline Trail.1200m. Isotype(s) [BISH, S].

Note: CFR: Skottsberg, Acta Regiae Soc. Sci. Litt. Gothob., Bot. 1: 34. 1972.

=Wikstroemia villosa
Note: CFR: Skottsberg, Acta Regiae Soc. Sci. Litt. Gothob., Bot. 1: 34. 1972.

*Verification: None.