It is endemic to Maui, where there are no more than 250 individuals remaining in the wild.

It is a federally listed endangered species of the United States.

[1] It was native to the island of Hawaii, where it was driven to extinction by feral ungulates such as pigs.

haleakalaensis, has been reduced to a population under 250 by habitat degradation caused by exotic plants and feral non-native animals.

[4] This Hawaiian lobelioid is a short-lived shrub which grows as a vine.