Phyllostegia ambigua (A. Gray) Hillebr. var. longipes Hillebr., Fl. Hawaiian Isl. 350. 1888.
Type information:
Holotype [B]. J. M. Lydgate s.n.. s.d.. Hawai`i. Isotype(s) [BISH!, MEL [photo BISH!]].

Note: This plant is presently known only from Hawai`i, and there is strong doubt that the type was collected on Maui, although original label says "probably E. Maui."

=Phyllostegia warshaueri
Note: This plant is presently known only from Hawai`i, and there is strong doubt that the type was collected on Maui, although original label says "probably E. Maui."

*Verification: Wagner, W.L. 1999. Novon 9:265-279.