Australopyrum calcis subsp. calcis (Limestone wheatgrass)
Species: A. Australopyrum calcis subsp. calcis
Scientific name: Australopyrum calcis subsp. calcis
Common name: Limestone wheatgrass
Limestone wheatgrass is a low statured grass with a narrow, compact head and is endemic to Nelson/Marlborough. Its habitat is restricted to dry limestone outcrops.
It is threatened by weed encroachment, especially by introduced grasses, by the grazing by stock. Its small population size makes it susceptible to catastrophic events.