Centella asiatica, perennial creeping herb. Alias: eighteen lack of, a big bowl, horseshoe grass, Leigong root, ark shell grass, copper money grass, drop to hit and so on. Born in shady and wet wasteland, village side, roadside, ditch side. Stem ambulatory, rooting at the nodes. Leaves alternate, petiole long; leaf blade orbicular or reniform, 2-4 centimeters in diameter.

Flowering in summer; umbels capitate, 2-3 in leaf axils, with 3-6 sessile florets on each inflorescence; flowers reddish purple. Fruit small, oblate.