Cyanea longiflora (formerly Rollandia longiflora) is a rare species of flowering plant in the bellflower family known by the common name ridge rollandia. It is endemic to Oahu where there are only three remaining occurrences in the northern Waianae Mountains for a total of under 300 individuals. It is a federally listed endangered species. Like other Cyanea it is known as haha in Hawaiian.This Hawaiian lobelioid is a shrub appearing palm-like in form and reaching 3 meters in maximum height.