Common Name : Blistering ammannia Family : Lythraceae Habit : An erect annual herb. Stem : 10-50 cm tall, some what 4-angled, slender, smooth and more or less purplish. Leaves : The leaves are oblong, oblanceolate, or narrowly elliptic, about 3.5 centimeters long; those on the branches are very numerous, small, and 1 to 1.5 centimeters long with narrowed base and pointed or somewhat rounded tip. Flowers : The flowers are small, about 1.2 mm long, greenish or purplish, and borne in dense axillary clusters. Fruits : The capsules are nearly spherical, depressed, about 1.2 mm in diameter, purple, and irregularly circumssciss above the middle. Seeds : The seeds are black.