Hesperomannia arbuscula

{{Short description|Species of flowering plant}}

{{Speciesbox

|status = CR

|status_system = IUCN3.1

|status_ref = {{cite iucn |author=Bruegmann, M.M. |author2=Caraway, V. |date=2003 |title=Hesperomannia arbuscula |volume=2003 |page=e.T34003A9826564 |doi=10.2305/IUCN.UK.2003.RLTS.T34003A9826564.en |access-date=17 November 2021}}

| status2 = G1

| status2_system = TNC

| status2_ref =

| taxon = Hesperomannia arbuscula

|authority = Hillebr.

}}

Hesperomannia arbuscula, the Maui island-aster or Maui hesperomannia, is a species of flowering plant in the family Asteraceae that is endemic to the island of Maui in Hawai{{okina}}i; plants from O{{okina}}ahu are now classified as Hesperomannia oahuensis. It is found in mixed mesic and wet forests at elevations of {{convert|350|-|900|m|ft|abbr=on}}.{{cite web|url=http://www.state.hi.us/dlnr/dofaw/cwcs/files/Flora%20fact%20sheets/Hes_arb%20plant%20NTBG_W.pdf |title=Hesperomannia arbuscula |work=Hawaii's Comprehensive Wildlife Conservation Strategy |publisher=Hawaii Department of Land and Natural Resources |accessdate=2009-10-28 |url-status=dead |archiveurl=https://web.archive.org/web/20110616075423/http://www.state.hi.us/dlnr/dofaw/cwcs/files/Flora%20fact%20sheets/Hes_arb%20plant%20NTBG_W.pdf |archivedate=2011-06-16 }} It is threatened by habitat degradation caused by feral pigs, competition with alien plants, predation from rats, and trampling or collecting by humans.

There are fewer than 25 plants remaining in the wild.