Lithocarpus Haipinii Chun, also known as An'er Ke, is a plant species in the family Fabaceae, with a height of up to 30 meters. The bark is not cracked, dark gray brown, the inner layer is light reddish brown, the leaves are thick, hard and brittle, wide elliptical, oval, inverted or inverted oval, and the leaf edges are rolled back. Male inflorescence with multiple spikes arranged in a conical shape; The female inflorescence is relatively short. The young shell of the nut is fully wrapped, with short bracts and mature shell shaped discs or pots; Nuts are nearly spherical and slightly flattened, with a flat bottom and chestnut brown color. When fully ripe, they have longitudinal cracks and a concave navel,. The flowering period is from July to August, and the fruit matures at the same time the following year. The fruit contains 58% starch.

Lithocarpus glaber (Thunb.) Nakai is a tree in the family Fabaceae. The plant reaches a height of 15 meters; Leaves are leathery or hard papery in texture, oblong or oblong in shape, with 2-4 shallow teeth on the entire margin or near the tip. The lower part of the old leaves is hairless or almost hairless and covered with a waxy scale layer; Flowers have small branches, young petioles, and the underside of leaves and inflorescence axis are densely covered with grayish yellow short hairs; The fruit is disc-shaped or shallow bowl shaped, with triangular scales, and is covered with gray soft hairs. The fruit is elliptical in shape; The flowering period is from September to October; The fruiting period is from September to October of the following year.