Lobelia niihauensis H. St. John var. forbesii H. St. John, Occas. Pap. Bernice P. Bishop Mus. 15(2): 23. 1939.
Type information:
Holotype [BISH]. C.N. Forbes 607.K. 16-17 October 1916. Kaua`i: Nounou Mts., on a rock cliff.
=Lobelia niihauensis