EN

Bidens wichmanii

Declining

Overview

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

Bidens wichmanii faces severe threats from habitat destruction due to urban development and agricultural expansion across its limited range in Hawaii. The species is particularly vulnerable to invasive plant species that outcompete it for resources and alter soil conditions. Climate change poses additional risks through altered precipitation patterns and increased storm intensity, which can damage the fragile ecosystems where this endemic Hawaiian plant survives.

Threat summary

Habitat

Bidens wichmanii inhabits dry to mesic shrublands and open woodlands in the Hawaiian Islands, typically growing on volcanic soils at moderate elevations. The species is adapted to the unique microclimatic conditions of Hawaiian dry forests and shrubland ecosystems.

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 wichmanii classified as Endangered?
Bidens wichmanii 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 wichmanii faces severe threats from habitat destruction due to urban development and agricultural expansion across its limited range in Hawaii. The species is particularly vulnerable to invasive plant species that outcompete it for resources and alter soil conditions. Climate change poses additional risks through altered precipitation patterns and increased storm intensity, which can damage the fragile ecosystems where this endemic Hawaiian plant survives.
Where does Bidens wichmanii live?
Bidens wichmanii 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 wichmanii?
The main threats to Bidens wichmanii 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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