Poplar bark

Poplar bark

(Tang materia medica)

[synonym] white poplar skin (meishiji prescription).

[source] it is the bark of Populus davidiana.

[plant morphology] Populus davidiana, also known as Populus deltoides, Populus deltoides.

tree. The trunk is slender and erect, up to 20 meters high. The annual branches are yellowish brown, glossy; the perennial branches are green gray or dark gray, with obvious lenticels. The leaf bud is 0.5-1 cm long, ovoid, usually with 4 scales; the single leaf is alternate; the size and shape are quite variable, nearly triangular, usually 3-7.5 cm long, 3-8.5 cm wide, apex pointed, base round or cuneate, edge irregularly serrated; the petiole is 3-6.5 cm long, the leaves on the tender branch are 14 cm long, petiole is 8.5 cm long. The inflorescence is catkin, the first leaf of flower is open; the male inflorescence is 11.5 cm long, the stamens are 4-11, the anthers are long oval or oval, red or purple; the female inflorescence is 7-15 cm long, the ovary is sessile, the style is very short, the stigma is divided and flat. The disk is long and narrow funnel-shaped with hairy margin. Capsule elliptic spindle shaped. Seeds obovate or ovate, light brown, stipe long, with many long hairs. The flowering period is from March to April.

Born on the hillside. Distributed in Heilongjiang, Jilin, Liaoning, Inner Mongolia, Hebei, Shanxi, Henan, Shaanxi, Sichuan and other places.

The root bark (root bark of Populus alba), branch (Branch) and leaf (leaf) of this plant are also used for medicine. Please refer to the special section for details.

[processing] Lei Gong's treatise on Processing: "when the bark of poplar is scraped with a copper knife and steamed, it is put in a cloth bag and hung to the east of the house for drying. "

Bitter, cold.

① Tang materia medica: "bitter taste, non-toxic. "

② "Rihuazi materia medica:" sour taste, cold. "

③ "Compendium": "bitter, cold, non-toxic. "

Functions and indications: dispelling wind, promoting blood stasis and eliminating phlegm. It is used to treat rheumatism, beriberi, blood stasis, dysentery, toothache and aphthous ulcer.

① Tang materia medica: "the main wind for a long time, foot emphysema, limbs slow weak not with, poison gas in the skin, phlegm addiction, etc. Take it with wine stains. "

② According to the collection of Materia Medica, it is said that "to remove the wind and block the blood, to break the wound, to drain the blood between the bones and the flesh, to make the pain unbearable, to make the skin itchy and swollen, to make the miscellaneous wood soup, and to smooth the damaged area. "

③ "Rihuazi Materia Medica" says: "it is necessary to take wine for the treatment of bruised blood stasis, and the decoctions can be used for the extension of muscles and bones. "

④ "Compendium": "decocting serous water, gargling with salt, treating aphthous ulcer. "

[usage and dosage] oral administration: decoction, 1-3 Liang; or soaking in wine. External use: gargle or soak in boiling water.

[prescription selection] 1. To treat the gall gas: three buckets, cook well, take ten liang of round leaf poplar skin, do not let the wind see, cut, five liters of water, boil two liters, five liang of pickled koji, make wine as usual, one for each day, and take it again every day. (waitai)

② Treatment of dysentery during pregnancy: one jin of poplar skin. Finely cut, take one large liter of water, boil two small liters, take three servings. (Qian Jin Fang)

③ Treatment of toothache: white poplar skin, fried with it. (Mei Shi Ji Yi Fang)