Growing in bushes and grasslands, but also in open woods, at altitudes from lowlands to 2,300 m, but to 3,400 m in Sichuan Province (Kangding), China. In E Asia: China, the Korea Peninsula, E Mongolia, and Russia (the Far East and SE Siberia).
The most distinct character of Paeonia lactiflora is the cartilaginous thickening along the leaf margins, which are dentate—spinose on these thickenings.
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