Schiedea diffusa A. Gray var. angustifolia Wawra, Flora 56: 175. 1873.
Type information:
Holotype [W]. H. Wawra 1825. [27-12 January-February 1870. Kaua`i: Wailuku Valley.

Note: Holotype not located. Almost certainly collected on West Maui as there is no Wailuku Valley on Kaua`i

=Schiedea diffusa subsp. diffusa
Note: Holotype not located. Almost certainly collected on West Maui as there is no Wailuku Valley on Kaua`i

*Verification: W.L. Wagner, S.G. Weller.