Also known as horse tooth, five elements grass, five fragrant grass, longevity vegetable, nine lion grass. Purslane is the whole plant of the genus Purslane in the family Purslane. Li Shizhen classified it as a vegetable slippery dish. Its leaves are like purslane and smooth like amaranth, hence the name purslane. Its julia, red stems, yellow flowers, white roots, and black seeds are all colorful, and it is also called five-star grass. The five colors correspond to the five directions, also known as the five directions of grass. Its durability is that it is not easy to dry and grows when exposed to water. It is also called longevity vegetable. Acid, cold, non-toxic. Extended information: Annual herb, whole plant hairless. The stems are prone or reclining, spreading, multi-branched, cylindrical, 10-15 cm long, light green or light red. The stems are purple-red, and the leaves are alternate, sometimes nearly opposite. The leaves are flat, thick, obovate, like horse teeth, 1-3 cm long and 0.6-1.5 cm wide. The top is obtuse or truncated, sometimes slightly concave, the base is wedge-shaped, and the entire edge is dark green in the upper part and light green or red in the lower part. The midrib is slightly raised; the petiole is thick. Flowers sessile, 4-5 mm in diameter, usually in clusters of 3-5 branches, blooming at noon; bracts 2-6, leaf-like, membranous, nearly whorled; sepals 2 opposite, green, helmet-shaped, flat on the left and right, About 4 mm long, with a sharp apex, a raised back, and a connate base. Petals 5, 4 sparsely yellow, obovate, 3-5 mm long, concave apex, connate at the base; stamens usually 8 or more, about 12 mm long, anthers yellow; ovary glabrous, style slightly longer than stamens, Stigma 4-6-lobed, linear. The capsule is oval, about 5 mm long, and cracked; the seeds are small, mostly oblique spherical, dark brown, shiny, less than 1 mm in diameter, with small wart-like protrusions. It blooms from May to August and bears fruit from June to September. It is produced all over China. It grows in vegetable gardens, farmland, and roadsides, and is a common weed in fields. Widely distributed in temperate and tropical regions of the world.