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].