Rumex giganteus W.T. Aiton f. coccineus Fosberg, Occas. Pap. Bernice P. Bishop Mus. 24(2): 16. 1969.
Type information:
Holotype [US]. F.R. Fosberg 41652. 22 March 1961. Hawai`i: N Kona, Hualalai, SE of Kauunuoku.1920m. Isotype(s) [US!].
=Rumex giganteus

*Verification: R.K. Shannon, W.L. Wagner.