Maui reedgrass
Calamagrostis expansa
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Greeneochloa_expansa
Overview
A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.
Maui reedgrass faces severe pressure from invasive plant species that outcompete this endemic Hawaiian grass in its native montane habitats. Feral ungulates, particularly pigs and goats, trample and uproot populations while creating disturbed areas that facilitate further invasive species establishment. Climate change poses an additional threat as shifting precipitation patterns and rising temperatures alter the cool, moist conditions this high-elevation specialist requires for survival.
Habitat
Maui reedgrass is endemic to the high-elevation montane shrublands and grasslands of Maui, typically found between 1,200-2,100 meters elevation in areas with cool temperatures and consistent moisture. It grows in native Hawaiian dry forest remnants and subalpine shrubland communities, often associated with other endemic Hawaiian grasses and shrubs.
Other threatened species in Poaceae
Frequently asked questions
Why is Maui reedgrass classified as Vulnerable?
Where does Maui reedgrass live?
What are the main threats to Maui reedgrass?
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