Cyanea remyi is a rare species of flowering plant in the bellflower family known by the common name Remy's cyanea. It is endemic to Hawaii, where it is known only from the island of Kauai. It is a federally listed endangered species of the United States. Like other Cyanea, it is known as haha in Hawaiian. The habitat is threatened with degradation and destruction by a number of forces, especially feral pigs and exotic plant species such as Chinese ground orchid (Phaius tancarvilleae) and Koster's curse (Clidemia hirta).