Dubautia platyphylla (A. Gray) D.D. Keck , Occas. Pap. Bernice P. Bishop Mus. 11(19): 28. 1936.
*Verification: D.M. Mix.

Type Information
Basionym: Railliardia platyphylla A. Gray , Proc. Amer. Acad. Arts 5: 134 1861.
Maui, East Maui, on banks of crater. 1840. U. S. Expl. Exped. s.n..
Lectotype [US]. Isolectotype(s) [GH! [photo F!], K!, NY [photo F!], US!]. Lectotypified in G. Carr. Allertonia 4: 105. 1985.
Note: As "Raillardia." Sherff (1935) cited two sheets as type; Carr designated one of the two as lectotype and the other as isolectotype.
*Verification: R.K. Shannon, W.L. Wagner; Carr, G.D. 1985. Allertonia 4:1-123.

Basionym: Railliardia platyphylla A. Gray var. leptophylla Sherff, Amer. J. Bot. 20: 619 1933.
Maui, Haleakala, on Pu`unianiau Crater. October 1910. Rock 8578.
Holotype [GH]. Isotype(s) [BISH! [6], [photo F!], F!, GB!, GH!, K!, NY!, UC!, US!].

Note: As "Raillardia". Photo of holo at F!.
*Verification: None.

Basionym: Railliardia platyphylla A. Gray var. trillioidea O. Deg. & Sherff, in Sherff, Amer. J. Bot. 28: 30 1941.
Maui, [East Maui, Haleakala], S of Kaluanui, on dryish talus. 7 August 1939. Degener et al. 12425.
Holotype [F]. Isotype(s) [B!, F!, GH! [4], NY [3, mfc!], PTBG!, US! [3]].

Note: Present det. by G. Carr, 1986.
*Verification: R.K. Shannon.