Phyllostegia brevidens A. Gray var.? ambigua A. Gray, Proc. Amer. Acad. Arts 5: 343. 1862 [Jan]. Type information: Holotype [US]. U. S. Expl. Exped. s.n.. 1840. Maui: West Maui. Isotype(s) [GH]. =Phyllostegia ambigua