thumb|right|H. waimeae subsp. hannerae flower
Hibiscus waimeae (white Kauai rosemallow, , or ) is a species of flowering plant within the okra family, Malvaceae, that is endemic to the island of Kauai in Hawaii.
Description
It is a small gray-barked tree, reaching on average a height of and an average trunk diameter of . Around 1/8 inches long, the fuzzy brown seeds of the hibiscus waimeae plant are enclosed in protective oblong pods. Though flowers bloom and close over the course of one day, the plant itself can live longer than 5 years.
H. arnottianus of Oahu and Molokai and H. waimeae are the only Hawaiian hibiscuses that have white flowers. Producing a sweet-smelling flower, the hibiscus waimeae plant is also one of only two hibiscus species to have a fragrance. H. waimeae subsp. hannerae is rarer (listed as endangered by the USFWS) and can often be found in the northwestern part of the island where it grows in the Hanakapiai, Limahuli, and Kalihi Wai valleys.
The plant was primarily grown around homes and used as decoration by Native Hawaiians, though it is said that H. waimeae flowers were also eaten by men and boys as a laxative.