Cyanea eleeleensis

Cyanea eleeleensis was a rare species of flowering plant in the bellflower family known by the common name Eleele cyanea. It was endemic to Kauai, where it has been declared extinct. It was federally listed as a critically endangered species of the United States in 2010. Like other "Cyanea" it is known as haha in Hawaiian.
This Hawaiian lobelioid was discovered in 1977 near a gulch called Pali 'Ele'ele on Kauai. The shrub is known to grow nearly two meters tall with leaves up to 40 centimeters long by 11 wide. The inflorescence bears up to 20 tubular flowers which are purple in color with paler longitudinal stripes.
Threats to this rare species included habitat degradation by feral pigs, exotic plants, and landslides.