Critically Imperiled (NatureServe)
Acaena exigua is a very rare species of flowering plant in the rose family known by the common name liliwai. It is endemic to Hawaii, where it is known from Kauaʻi and west Maui. It had not been seen or collected since 1957 and was feared extinct until 1997, when one plant was discovered in a remote montane bog on Maui. The plant died in 2000.
This is a federally listed endangered species of the United States.
- Records of the Hawaii Biological Survey for 1997, Part 2: Notes. Bishop Museum Occasional Papers 56, page 6.
- Acaena exigua: 5 Year Review, Summary and Evaluation
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