Acaena sanguisorbae.

Botanical name: 

Acaena sanguisorbae Vahl. Rosaceae. New Zealand Bur.

Australia. The leaves are used as a tea by the natives of the Middle Island in New Zealand, according to Lyall. It is the piri-piri of the natives.

Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.