Cyanea crispa

Cyanea crispa NatureServe Explorer Species Reports — NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.

ITIS Reports — Cyanea crispa ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

FWS Digital Media Library — The U.S. Fish and Wildlife Service’s National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.

Cyanea crispa is a rare species of flowering plant known by the common names crimped rollandia and Koolau Range rollandia. It is endemic to Oahu, where there are no more than fifty individuals remaining in the Koʻolau Range. It is a federally listed endangered species of the United States. Like other Cyanea it is known as haha in Hawaiian.

The plant occurs in several types of habitat in the Koʻolau Mountains, including open moist forest and the shady understory of wet forest. The remaining 30 to 50 plants are divided among five populations, but three of the populations have only one plant each. Threats to the species include its small numbers and habitat destruction and degradation by feral pigs, rats, slugs, and exotic plants such as Koster’s curse (Clidemia hirta) and thimbleberry (Rubus rosifolius)