Also known as Maya, Five-star Grass, Five-aromatic Grass, Longevity Vegetable and Nine-stone Grass. Portulaca oleracea L. is the whole grass of Portulaca oleracea L. of Portulaceae. Li Shizhen listed it as "food slippery". Its leaves are like horse teeth, and its nature is like amaranth, so it is named purslane. Its Julia, red stems, yellow flowers, white roots and black seeds are all colorful, also called five-star grass. Five colors correspond to five parties, also known as grass five parties. Its durability is not easy to dry, and it is born when it meets water, also known as longevity dish. Acid, cold and non-toxic. Extended information: annual herb, the whole plant is hairless. The stems are prone or inclined, prostrate, multi-branched, cylindrical, long 10- 15 cm, light green or light red. The stems are purplish red, and the leaves are alternate, sometimes nearly opposite. The leaves are flat and thick, obovate, like horse teeth, with a length of 1-3 cm and a width of 0.6- 1.5 cm. The top is blunt or truncated, sometimes slightly concave, the base is wedge-shaped, the whole edge, the upper part is dark green, the lower part is light green or reddish, and the midvein is slightly convex; Petiole stout. Flowers sessile, 4-5 mm in diameter, usually 3-5 clustered branches, flowering at noon; Bracts 2-6, leaflike, membranous, suborbicular; Sepals 2 opposite, green, helmet-shaped, flat left and right, about 4 mm long, sharp at the top, protruding from the back, and united at the base. Petals 5, sparse 4, yellow, obovate, 3-5 mm long, concave at the top and connate at the base; Stamens are usually more than 8, about 12 mm long, and the anthers are yellow; Ovary glabrous, style slightly longer than stamens, stigma 4-6 lobed and linear. Capsule ovoid, about 5 mm long, dehiscent; The seeds are small, mostly oblique spherical, dark brown and shiny, with a diameter less than 1 mm and small verrucous protrusions. It blooms in May-August and bears fruit in June-September. It is produced all over China. Born in vegetable garden, farmland and roadside, it is a common weed in the field. Widely distributed in temperate and tropical regions of the world.