It is endemic to Hawaii, where it is known from fewer than 1000 individuals on the islands of Kauai and Oahu.

It has lance-shaped, leathery leaves up to 30 centimeters long and produces fragrant purple flowers.

[2] This shrub grows in moist and wet forest habitat.

[1] There are fewer than 50 individuals remaining on Oahu, and the plant is slightly more abundant on Kauai.

[1] The plants' habitat is threatened by feral ungulates including wild boars.