Flora of the Hawaiian Islands --Basionym Type Information Metrosideros collina (J.R. Forst. & G. Forst.) A. Gray var. imbricata Rock, Hawaii, Board Agric. Forest. Bot. Bull. 4: 49 1917.
O`ahu: Ko`olau Range. U. S. Expl. Exped. s.n..
Note: Who made lectotype designation? This seems to be just a young growth form of var. incana (prob. var. polymorpha also) before the sympodial growth habit has been established.