Australopyrum calcis subsp. calcis (Limestone wheatgrass) Native

Kingdom: Plantae
(Unranked): Angiosperms
(Unranked): Monocots
(Unranked): Commelinids
Order: Poales
Family: Poaceae
Genus: Australopyrum
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.

Photographed at Otari Native Botanic Garden and Wilton's Bush Reserve. Wellington. 
Australopyrum calcis subsp. calcis-001.JPG

Australopyrum calicis subsp calcis Limestone wheatgrass-001.JPG  

Australopyrum calcis subsp. calcis-002.JPG 

Thanks to Wikipedia for text and information: