Paeonia lactiflora is a kind of perennial herb. Its root consists of three parts: root neck, tuber and fibrous root. The head of the root neck is the top of the heel, bearing buds; the root tuber grows from the bottom of the root neck, fleshy, rough, long column or spindle shaped, nutritious; the fibrous root mainly grows from the root tuber, and its main function is to absorb water and nutrients.
The leaves of Paeonia lactiflora are two or three pinnate compound leaves, the length of the leaves is 20 to 24 cm, the shape of the leaflets is oval, lanceolate or narrow ovate, the front end of the leaves is sharp, the edge of the leaves is dense with white fine teeth, the color of the leaves is yellow green, dark green, etc..
The flowers of Paeonia lactiflora usually grow alone at the top of the stem or near the axils of the leaves at the top. The flowers of the original species are white, 8 to 11 cm in diameter, 5 to 13 petals, which are obovate, and the top of the petals is blunt and round.
