Boottia cordata.

Botanical name: 

Boottia cordata Wall. Hydrocharitaceae.

A water plant of Burma. All the green parts are eaten by the Burmese as pot-herbs, for which purpose they are collected in great quantity and carried to the market at Ava.

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