{{Short description|Species of flowering plant}} {{Speciesbox |image = |status = G1 |status_system = TNC |status_ref = <ref name=tnc/> |status2 = CR |status2_system = IUCN3.1 |status2_ref = <ref name=IUCN>{{cite iucn |author= Keir, M. |author2=Kwon, J. |author3=Caraway, V.L. |author4=Weisenberger, L. |date=2015 |title= ''Cyanea longiflora'' |volume=2015 |article-number= e.T78777282A78777287 |doi= 10.2305/IUCN.UK.2015-4.RLTS.T78777282A78777287.en |access-date=28 December 2023}}</ref> |genus = Cyanea |species = longiflora |authority = (Wawra) Lammers, Givnish & Sytsma |synonyms = ''Rollandia longiflora'' }}
'''''Cyanea longiflora''''' (formerly ''Rollandia longiflora'') is a rare species of flowering plant in the bellflower family known by the common name '''ridge rollandia'''. It is endemic to Oahu where there are only three remaining occurrences in the northern Waianae Mountains for a total of under 300 individuals.<ref name=tnc>[http://www.natureserve.org/explorer/servlet/NatureServe?searchName=Cyanea+longiflora ''Cyanea longiflora''.] The Nature Conservancy.</ref><ref name=five>USFWS. [http://ecos.fws.gov/docs/five_year_review/doc2462.pdf ''Cyanea longiflora'' Five-year Review.] April 2009.</ref> It is a federally listed endangered species. Like other ''Cyanea'' it is known as '''''haha''''' in Hawaiian.<ref name=carr>[http://www.botany.hawaii.edu/faculty/carr/cyanea.htm Hawaiian Native Plant Genera: ''Cyanea'']</ref>
This Hawaiian lobelioid is a shrub appearing palm-like in form and reaching 3 meters in maximum height. The inflorescence produces magenta flowers.<ref name=tnc/> The fruit is a berry which is purple to red when small and ripens to orange.<ref name=five/>
The US Fish and Wildlife Service stated in 2009 that a recent count revealed a total of 76 mature plants, plus 84 immature plants and 28 seedlings. The plant appears to be limited to the northern Waianae Mountains today and no longer survives in the Koʻolau Range, where a few populations had been known.<ref name=five/>
Threats to this species include its small numbers, destruction and degradation of its habitat by feral pigs, feral goats, exotic plant species, military exercises, and vandalism. The habitat is prone to erosion and landslides, which can destroy the plants. Slugs and rats damage similar species and may threaten this one.<ref name=five/>
==References== {{Reflist}}
==External links== *[https://plants.usda.gov/java/profile?symbol=CYLO12 USDA Plants Profile]
{{Taxonbar|from=Q5197411}}
longiflora Category:Endemic flora of Hawaii Category:Biota of Oahu Category:Taxa named by Heinrich Wawra von Fernsee
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