Wild Water Chestnut ⁽¹⁾

Wild water chestnut (ye bi qi, Sagittaria) is a common malignant weed in southern paddy fields, named for its corm resembling the edible water chestnut (bi qi / Eleocharis dulcis). It is a sedge: stems are erect, tufted and cylindrical, 30-100 cm tall, 4-7 mm…