Bidens microcephala
Overview
A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.
Bidens microcephala faces severe pressure from agricultural expansion and urban development across its limited range in the Hawaiian Islands. The species is particularly vulnerable to habitat conversion for pineapple and sugarcane cultivation, which has eliminated much of its native dry forest habitat. Invasive plant species further degrade remaining habitat patches, while the species' restricted distribution makes it highly susceptible to localized extinction events.
Habitat
This endemic Hawaiian plant inhabits dry to mesic forests and shrublands, typically occurring on volcanic soils at elevations between 300-1,200 meters. It grows in open areas and forest edges within native koa and ohia-dominated ecosystems.