Carex virgata

Carex Virgata -  A fast growing sedge often popular in wetland restoration and riparian plantings.

This Rhizomatous, densely clumped to tussock-forming sedge is found in North, South Stewart Islands of New Zealand and Chatam Islands.

Widespread from sea level to about 1000 m a.s.l. in open, swampy conditions and also in damp sites within lowland forest. In parts of the country this sedge is often the dominant carice of lowland alluvial forest. 

It can grow from 1.5 to 4.5 mm wide. It has slender culms, narrower leaves and paler brown, less dense-flowered panicles.