Isodendrion longifolium A. Gray , Proc. Amer. Acad. Arts 2: 324 1852 [May].
O`ahu, [Ka`ala Mts.]. 4 November 1840. U. S. Expl. Exped. s.n..
Note: St. John (Pac. Sci. 6: 234. 1952) thought that the holotype had been destroyed and considered the (single) US sheet to be an isotype, based on a plate that Gray published later. There is no good evidence to indicate that the US sheet is not the holotype.
*Verification: R.K. Shannon, W.L. Wagner.