The Paeonia decomposita, Si chuan mu dan, is originally from the province of Sichuan, as the name suggests, and was once classified as P. szechuanica. It has a broad, vigorous shrub, up to 3 m tall, with single purplish-pink flowers. There are two subspecies with slightly different leaves, which live in different parts of Sichuan at high altitudes, between 1,700 and 3,100 m, in sparse forests or areas rich in shrubbery with chalky soil. Some varieties belonging to this species have flowers with a very large and heavy crown, to which it owes its distinctive drooping shape.
