The representative tree in Hebei is Sophora japonica.

is a Sophora japonica plant in Leguminosae, which is often used as shade tree and street tree, and has certain economic and medicinal value. Sophora japonica is a tree plant belonging to Leguminosae and Papilionidae. Sophora japonica is a good greening tree species, which is often used as a shade tree and street tree, and has certain economic and medicinal value. Sophora japonica and Platycladus orientalis have become the city trees in Beijing, and Sophora japonica is also the city trees in Xi 'an, Shaanxi Province and Dalian, Liaoning Province.

Morphological characteristics

Sophora japonica is 15-25m high, with dark gray dry skin, green branchlets and obvious lenticels. The pinnate compound leaves are 15-25 cm long; Leaf axis is hairy and the base is enlarged; 9-15 leaflets, oval, 2.5-7.5 cm long and 1.5-5 cm wide, tapering at the top and tapering at the base, broadly wedge-shaped, grayish white below, sparsely pubescent. Panicle terminal; Calyx campanulate, with 5 small teeth.

The corolla is milky white, the flag petal is wide and heart-shaped, with short claws and purple veins, and the edge of the keel petal of the wing petal is slightly purple; Stamens 1, unequal in length. Pods are fleshy, beaded, 2.5-5 cm long, hairless and indehiscent; 1-6 seeds, kidney-shaped. The flowering and fruiting period is from September to December.