Bitter chinkapin seeds.

Bitter chinkapin [scientific name: Castanopsis sclerophylla ?(Lindl.) Schott.] national second-class protected plants ? , is a beech order, Crustacea, cone genus trees, height sparse up to 15 meters, chest up to 50 cm, bark shallow longitudinal fissure, branches, leaves two columns are glabrous. Usually one side is slightly short and oblique, leaf blade leathery, inflorescence axis is glabrous, male spikes usually a single spike axillary, Shellcock has nuts occasionally 2-3, subglobose, apical mucron, umbilicus is located at the bottom of the nut, flowering in April-May, October-November began to fruit ripening.

Distributed throughout China north of the Yangtze River Five Ridges, preferring a warm, humid climate, light-loving, but also shade-tolerant; preferring deep, moist soil, but also resistant to drought and barrenness. Born in dense forests, often mixed with fir, camphor, village side, roadside cultivation. The species is an evergreen tree with a dense, rounded crown, high ornamental value, resistance to toxic gases such as CO, and can be used for landscaping. The leaves of Quercus glanca are thick leathery, both windproof and fireproof, and the fresh leaves can withstand the fire temperature of 425℃, which is also one of the good fireproof tree species. The appearance of chinkapin fruit is similar to that of chestnut, and the seed kernel is rich in starch, which can be made into chinkapin powder after soaking in water to remove astringency, and further processed into chinkapin tofu, chinkapin vermicelli, chinkapin vermicelli, chinkapin cake, which is good for preventing summer heat and lowering temperature. The wood of chinkapin is light yellow or yellowish white. It has a dense structure, straight grain, elasticity, moisture resistance and corrosion resistance, and it is the best timber for construction, bridge, furniture, sports equipment, agricultural tools and machinery, etc. At the same time, the branches of chinkapin can be used for the production of chinkapin food. At the same time, the branches of Quercus glanca are excellent material for edible fungus cultivation.