''Cyrtandra crenata'' is a rare species of flowering plant belonging to the African violet family known by the common name Kahana Valley cyrtandra. It is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Oahu Oahu (, , sometimes written Oahu) is the third-largest and most populated island of the Hawaiian Islands and of the U.S. state of Hawaii. The state capital, Honolulu, is on Oahu's southeast coast. The island of Oahu and the uninhabited Northwe ...

Hawaii Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...

, where it is known to be found only from the Koolau Mountains. It has not been seen since 1947, however, and it is feared to be extinct. The habitat is steep and inaccessible in some areas, so it is possible that specimens of this species still exist in the wild. It was federally listed an

endangered species An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, inv ...

of the United States in 1994. This

shrub A shrub or bush is a small to medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees by their multiple ...

grows 1 to 2 meters tall and bears white flowers.''Cyrtandra crenata''.
The Nature Conservancy. Like other Hawaiian ''Cyrtandra'' it is called .USFWS Species Reports: Listed Plants.
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References

crenata Endemic flora of Hawaii Plants described in 1950 {{Gesneriaceae-stub