Fruit grass: perennial loose herb. Most of the stems are prostrate, with roots at the nodes, the upper part and the upper parts of the branches rising, up to 70 cm long, and sparsely pubescent. The leaves have obvious petioles; the leaves are oval and nearly hairless. The involucral bracts are funnel-shaped, opposite to the leaves, and a constant number are gathered on the top of the branches. The lower edges are connate, 8-12 mm long, and sparsely hairy. The lower branch of the inflorescence has a slender stalk with 1-3 sterile flowers. A spathe protrudes, and there are several flowers on one branch. It is strong and does not protrude from the spathe. The petals are blue, round, 3-5 mm long; 2 of them have long claws on the inner surface. The capsule is oval, 3-chambered, with 2 cells on the ventral surface, each with two seeds. The seeds are nearly 2 mm long, wrinkled and irregularly reticulated, and black. The flowering period is summer and autumn.