Apodasmia or Leptocarpus similis Oi Oi OiOi wet or dry problem areas.

Apodasmia similis Leptocarpus  Oi Oi OiOi
This NZ native reed is a great choice for wet or dry problem areas. Also known as jointed rush as the delicate grey-green leaves have brown markings or joints at various points along the leaf length.  It grows in full sun and prefers damp, swampy areas and can grow in water also. It will also tolerate dry areas once established and is also suitable to growing in containers. 
Grows to H 1m x W 1.5m
Plants are  40cm tall.