Critically Imperiled (NatureServe)
Isodendrion laurifolium is a rare species of flowering plant in the violet family known by the common names rockcliff isodendrion and aupaka. It is endemic to Hawaii, where it is known from fewer than 1000 individuals on the islands of Kauai and Oahu. It is a federally listed endangered species of the United States.
This shrub only grows in moist and wet forest habitat. As of 2003 there were five occurrences of the plant on Oahu for a total of 22 or 23 individuals in the Waianae and Koolau Mountains. In Kauai there were thirteen occurrences with 142 to 154 plants. Only one population of the plant has more than 50 individuals.
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