Nicotiana tabacum

Nicotiana tabacum

(Shaanxi Chinese herbal medicine)

[source] it is the root of tangsongcao, a plant of Ranunculaceae.

[plant morphology] Thalictrum asiatica

Herbs perennial, glabrous. Stem erect, red, 65-150 cm high. The leaves are alternate, 2-3-fold, 3-compound, with short stalks, sheath like amplexicaul at the base, with leaves 35 cm long; the leaflets are ovoid, 1.6-5.5) cm long, 1-4 cm wide, 3-lobed, lobes entire or sparsely dentate, powdery below, veins raised. Panicle, 10-35 cm long; flowers small, about 7 mm in diameter, yellow green; sepals 4, green white, narrowly ovate, 3-4 mm long; apetalous; stamens numerous, about 7 mm long; carpels 2-4, stigmas arrowhead shaped. Achenes ovoid, 2-3 mm long, with distinct longitudinal ribs.

It grows on the edge of hill or mountain forest and valley. It is distributed in Guizhou, Hubei, Sichuan, Gansu, Shaanxi, North China and Northeast China.

[collection] harvest in summer and autumn, wash and dry.

[chemical constituents] the root contains 0.08% of thalictrine, 0.08% of thalictrine, 0.08% of homothalictrine and 0.08% of thalictrine. The stem and leaf contained 0.004% of thalictrine, 0.004% of thalictrine and 0.004% of thalictrine methyl ether. The leaves also contain the flavonoid glycosides of thalicterol.

The quaternary ammonium bases obtained from leaves, stems and roots vary from place to place. For example, the leaves, stems and roots of Tokushima products contain tamarine, the stems and leaves of Nagano products contain Gaotang, and Gaozhi products contain tamarine and berberine.

[pharmacological action] for the action of alkaloids contained in this product, please refer to "tangsongcao" and "qingmuxiang".

[nature and taste] Shaanxi Chinese herbal medicine: "bitter, cold, with little poison. "

[function indications] Shaanxi Chinese herbal medicine: "clearing heat and detoxifying. Treat toothache, acute dermatitis, eczema. "

[usage and dosage] oral: decoction, 2-3 yuan. External use: powder.

Chinese PinYin : Yan Guo Cao