hazelnut

hazelnut

(rihuazi materia medica)

[synonyms] chuizi (seeking the source of Materia Medica), hazelnut (illustration of common trees in Hebei), shanfanli (taxonomy of Chinese trees).

[source] it is the seed kernel of Corylus heterophylla.

[plant morphology] hazel (Book of songs)

Deciduous shrubs or small trees, 1-7 m high. Leaves alternate; broadly ovate to broadly obovate, 5-13 cm long and 4-7 cm wide, apex nearly truncate with sharp tip, base rounded or heart-shaped, margin irregularly double serrated, glabrous above, pubescent below veins; petiole 1-2 cm long, densely hairy; stipules small, caducous. The flowers are unisexual, monoecious, and the first leaves are open; the male flowers are in catkins, cylindrical, 5-10 cm long, with 2 accessory bracts per bract, fine hairs on each bract, sharp apex, bright purple brown, stamens 8, medicinal yellow; the female flowers have 2-6 clustered branch ends, which are enclosed in the scale bud when flowering, only the style is exposed, and the style is 2, red. Nutlets subglobose, about 0.7-1.5 cm in diameter, light brown, involucrate or campanulate, formed by (1-2) bracts, margin lobed, lobes almost entire, hairy. The flowering period is from April to May. The fruit period is from September to October.

It grows on the shady slope of the mountain and in the jungle. Distributed in Northeast, North China and Shaanxi, Gansu and other places.

The main characteristics of C. camphora are as follows: the leaf apex is not as flat as that of C. camphora, sometimes round, from which grows long or short acuminate, pubescent above, glabrous or nearly glabrous below; the involucre lobes often have teeth. Produced in Sichuan, Hubei, Hunan, Jiangxi, Zhejiang and other places.

[collection] the fruit is easy to fall off after ripening, so it should be picked in time, and the involucre and shell should be removed after drying.

[chemical composition] the content of carbohydrates, protein, fat and ash in the kernel is 16.5%, 16.2-18%, 50.6-77% and 3.5%, respectively. The fruit contains 15% starch. The content of tannin in leaves was 5.95-14.58%.

Sweet and smooth.

① Kaibao materia medica: "it tastes sweet, flat and non-toxic. "

② Yilin zuanyao: "sweet, salty, flat. "

[function indications] it can adjust the middle, stimulate the stomach and improve the eyesight.

① Cui Yuxi's "the book of food" said: "the eye is bright when eating, and the three insects are gone. "

② "Rihuazi Materia Medica": "fat white people, stop hunger, tune in, appetizer. "

③ "Kaibao Materia Medica" says: "it is beneficial to Qi and strength. It can broaden the stomach and make people not hungry. It is good at walking. "

[usage and dosage] oral administration: decoction, 1-2 Liang; or grinding powder.

[prescription selection] after treatment, the body is deficient, the food is little, and the fatigue is: two liang of hazelnut, one or two of yam, four coins of Dangshen, three coins of tangerine peel. Take it in water. (Ningxia Chinese herbal medicine manual)