Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Tribe: Gnaphalieae
Genus: Ozothamnus
Species: O. vauvilliersii
Binomial name: Ozothamnus vauvilliersii
Synonyms: Cassinia vauvilliersii,  Cassinia leptophylla subsp vauvilliersii, Ozothamnus leptophyllus,  
Common name: Mountain Cottonwood, Mountain tauhinu

2 New Zealand species of  Ozothamnus occurs throughout New Zealand but only Ozothamnus vauvilliersii is widespread. It usually occurs in the 900m to 1400m zone and can be found on Mt  Egmont/Taranaki.
Ozothamnus vauvilliersii is an erect, evergreen, bushy shrub, which can grow up to 3 m high. The small, leathery, green leaves are typically about up to 12 mm long and the edges are rolled in beneath. The whitish flowers occur in dense clusters of 10 to 20 during summer.

Shrub in flower early March on the Denniston plateau,  North Westland, South Island
Ozothamnus vauvilliersii Mountain Cottonwood .JPG

Photographed at Otari Wilton Native Gardens, Wellington.
1-Ozothamnus vauvilliersii.JPG

1-Ozothamnus vauvilliersii-001.JPG

Close up of the flowers.
Ozothamnus vauvilliersii Mountain Cottonwood -004.JPG

Photographed Mt Taranaki / Egmont later March
Ozothamnus vauvilliersii Mountain tauhinu.JPG

Late flowers. Photographed late March.
Ozothamnus vauvilliersii Mountain tauhinu-002.JPG 

Ozothamnus vauvilliersii Mountain tauhinu-005.JPG

Seed heads just being released when they will be blown by the wind.
Ozothamnus vauvilliersii Mountain tauhinu-004.JPG

Flower buds of Ozothamnus vauvilliersii   Photographed at Otari Wilton ReserveMountain cottonwood Cassinia vauvilliersii.-1.JPG

Mountain cottonwood Cassinia vauvilliersii..JPG

A young plant at Otari Wilton Native Gardens, Wellington.
Ozothamnus vauvilliersii Mountain Tauhinua-001.JPG 

Ozothamnus vauvilliersii-002.JPG  

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