About Calystegia tuguriorum (G.Forst.) R.Br. ex Hook.fil.
Calystegia tuguriorum, a morning glory, is a bindweed species with common names including New Zealand bindweed, pōuwhiwhi, and pōwhiwhi. It is a perennial vine. It grows in coastal and lowland areas across all of New Zealand, and also occurs in Chile and on the Juan Fernández Islands.