Basionym:
Tetraplasandra waialealae Rock var. acrior Sherff, Bot. Leafl. 6: 22 1952.
Kaua`i, Ke`aku Cave, Ka`ili`ili Stream. September 1909. Rock 4902.
Holotype
[GH].
Basionym:
Tetraplasandra waialealae Rock var. kohuana O. Deg. & Sherff, in Sherff, Amer. J. Bot. 43: 476 1956.
Kaua`i, Kohua Ridge, forest clearing. 9 September 1955. Degener et al. 23902.
Holotype
[F]. Isotype(s)
[BISH!, F, GH!, NY! [2, mfc!]].
Basionym:
Tetraplasandra waialealae Rock var. pluricostata O. Deg. & Sherff, in Sherff, Amer. J. Bot. 43: 476 1956.
Kaua`i, SE rim of Kalalau Valley, in rain forest near gulch. 7 September 1955. Degener and Degener 23898.
Holotype
[F]. Isotype(s)
[BISH!, GH!, NY! [mfc!], US!].
Basionym:
Tetraplasandra waialealae Rock var. subsessilis Sherff, Bot. Leafl. 6: 23 1952.
Kaua`i, Alakai, forests in vicinity of Lehua makanoi. 13 August 1938. Cranwell et al. 2925.
Holotype
[BISH]. Isotype(s)
[GB! [photo F]].
Basionym:
Tetraplasandra waialealae Rock var. urceolata Sherff, Bot. Leafl. 6: 23 1952.
Kaua`i, Kaluiti Stream, high plateau. 1465 m. 22 September 1909. Rock 4902.
Holotype
[BISH]. Isotype(s)
[BISH!].
Basionym:
Tetraplasandra waialealae Rock var. wahiawensis Sherff, Bot. Leafl. 6: 24 1952.
Kaua`i, Wahiawa Swamp. 11 August 1909. Forbes 274.K.
Holotype
[BISH]. Isotype(s)
[BISH!, K!, L, US!].