Viola kauaensis A. Gray , U. S. Expl. Exped., Phan. 85. 1854.
Type information:
Holotype [US]. U. S. Expl. Exped. s.n.. 1840. Kaua`i: on mountains.
=Viola kauaensis var. kauaensis

*Verification: None.

Viola kauaensis A. Gray var. wahiawaensis C. N. Forbes, Occas. Pap. Bernice P. Bishop Mus. 7(3): 34. 1920.
Type information:
Holotype [BISH]. C.N. Forbes 166.K. August 1909. Kaua`i: Wahiawa swamp. Isotype(s) [BISH! [2], US].

Note: As "kauaiensis".

=Viola kauaensis var. wahiawaensis
Note: As "kauaiensis".

*Verification: R.K. Shannon.

Viola kauaensis A. Gray var. hosakae (H.St.John) Havran & Ching Harbin, PhytoKeys 39: 44.. 2014. Flora of the Hawaiian Islands --Basionym
Type Information

*Verification: N. Khan.