Kingdom: Plantae
(Unranked): Angiosperms
(Unranked): Monocots
(Unranked): Commelinids
Order: Poales
Family: Cyperaceae
Genus: Carex
Species: C. testacea
Binomial name: Carex testacea,
Common name: Orange sedge.

Carex testacea is a hardy native sedge with a distinctive rich orange and green colouring and with arching, rather wide-spreading foliage. It has very long seed head stems. It grows to a height of 0.5 m. It is found throughout New Zealand in lowland to montane forests, grasslands and sand dunes. It is sold by nurseries and is probably the most popular native grass used for amenity planting.

Photographed at Otira Wilton Bush Reserve.
[1]

Photographed at Christchurch Botanical Gardens.
[http://ketenewplymouth.peoplesnetworknz.info/image_files/0000/0008/3708/Carex_testacea-001.JPG
]
Young plants growing in a nursery.
[2]

Young grass photographed in a nursery. Bronze form
[3] 

Thanks to Wikipedia for text and information: https://creativecommons.org/licenses/by-sa/3.0