EN

Bidens henryi

Unknown

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Bidens henryi faces severe population decline primarily due to habitat destruction from agricultural expansion and urban development across its limited range in Hawaii. The species is particularly vulnerable to invasive plant species that outcompete it for resources and alter soil chemistry in its native ecosystems. Climate change poses an additional threat through altered precipitation patterns that affect the moist conditions this endemic Hawaiian plant requires for reproduction and survival.

Threat summary

Habitat

Bidens henryi inhabits moist to wet forests and forest margins in the Hawaiian Islands, typically growing in areas with rich volcanic soils and consistent moisture levels. The species is found at moderate elevations where it benefits from cloud forest conditions and reduced competition from lowland invasive species.

Other threatened species in ASTERACEAE

EN

Bidens cosmoides

Declining
VU

Piptolepis monticola

Unknown
Libanothamnus parvulusCR

Libanothamnus parvulus

Declining
EN

Gynoxys neovelutina

Declining

Frequently asked questions

Why is Bidens henryi classified as Endangered?
Bidens henryi is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Bidens henryi faces severe population decline primarily due to habitat destruction from agricultural expansion and urban development across its limited range in Hawaii. The species is particularly vulnerable to invasive plant species that outcompete it for resources and alter soil chemistry in its native ecosystems. Climate change poses an additional threat through altered precipitation patterns that affect the moist conditions this endemic Hawaiian plant requires for reproduction and survival.
Where does Bidens henryi live?
Bidens henryi occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Bidens henryi?
The main threats to Bidens henryi are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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