Tetraplasandra waialealae Rock var. pluricostata O. Deg. & Sherff, in Sherff, Amer. J. Bot. 43: 476. 1956.
Type information:
Holotype [F]. O. Degener and I. Degener 23898. 7 September 1955. Kaua`i: SE rim of Kalalau Valley, in rain forest near gulch. Isotype(s) [BISH!, GH!, NY! [mfc!], US!].