lanaiensis,[1][3]: 47688  the latter being a perennial herb with dentate leaves, often reddish or red-veined, and white flowers, occasionally tinged with purple, distinguished from P. g. var.

[5] In September 1991, the United States Fish and Wildlife Service (FWS) listed Phyllostegia glabra var.

lanaiensis as an endangered species,[3]: 47694  stating that it had not been seen since a single plant was sighted on Lanai in the 1980s.

lanaiensis occurred in 1914 and proposed that the variety be declared extinct and stricken off the endangered species list.

[6] During the public comment period, surveys revealed new habitat that could support the species and the proposal was withdrawn.