Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Rosales
Family: Rosaceae
Subfamily: Rosoideae
Tribe: Sanguisorbeae
Subtribe: Sanguisorbinae
Genus: Acaena
Species: A. fissistipula
Binomial name: Acaena fissistipula
Common name: Bidibid, piripiri, New Zealand Burr

Acaena fissistipula is dull greyish creeping, evergreen, drought-tolerant herb that is widespread in montane to low alpine areas (300-1500m) in the South Island, New Zealand. 
The dull greyish, alternate leaves are pinnate with a single leaflet at the apex leaves are alternate. The leaflets are elliptic and have serrate margins. It can tolerate temperatures down to -23°C.

Photographed roadside Arthur's Pass late February.1-Acaena fissistipula-002.JPG

1-Acaena fissistipula-001.JPG

1-Acaena fissistipula.JPG

Thanks to Wikipedia for text and information: