1、 Shape difference

Prunus in North China is a shrub with a height of about 3 meters. Its twigs are cylindrical, smooth and hairless. Green when young and reddish brown when old. Winter buds are ovate, reddish brown, apex acute

Pearl plum is shorter than the former, about 2 meters. The shape of branchlets is similar to the former, cylindrical and pubescent. It is green when young and dark reddish brown or yellowish brown when old. Winter buds are ovate, purplish brown, with blunt apex

2、 Blade difference

Pearl plum of North China has pinnate compound leaves, 13-21 leaflets, opposite, lanceolate to oblong lanceolate, and the stipules are membranous and linear lanceolate

Pearl plum is also pinnately compound leaf, with 11-17 leaflets, which are lanceolate, then ovate lanceolate, and stipules, which are ovate lanceolate, then triangular lanceolate