Coriaria pottsiana, commonly called the Hikurangi tutu or Pott's tutu, is a rare low-growing sub-alpine perennial summer-green shrub, only known to exist on a small grassy scree slope behind the tramping hut on Mount Hikurangi in the Gisborne Region of New Zealand's North Island. The Mt Hikurangi tramping hut is found at 37°54′22″S 178°3′31″E / 37.90611°S 178.05861°E. Like all Coriaria species, the plant is poisonous, especially the seed inside the small black berries. However, the juice of some Coriaria berries is not poisonous, and was used by Māori, who called members of the genus "tutu".