Alias: Nengxiao, Iron-footed Clematis, Lingxian, Black-footed Clematis, Black Bone

Source: Medicinal material base: for The roots and rhizomes of the Ranunaceae plants Clematis, Clematis cotton, Clematis spicata, Clematis tomentosa and Clematis stylocarpa.

Habitat segment ecological environment:

1. Grows on slopes at an altitude of 80-150m, in bushes in valleys, and in grass beside ditches and roadsides.

2. Born on dry hillsides, hillside grasslands or fixed sand dunes.

3. Born in bushes on hillside, under miscellaneous wood or on the edge of forest.

4. Born in sparse forests on hillside, roadside bushes or valleys or streams at an altitude of 250-1850m.

5. Born in mountains, valleys, bushes beside streams, and forest edges at an altitude of 100-1800m.

Resource distribution:

1. Distributed in southern Shaanxi, southern Jiangsu, south of Huaihe River in Anhui, Zhejiang, Jiangxi, Fujian, Taiwan, Henan, Hubei, Hunan, Guangdong, Guangxi, Sichuan, Guizhou, and southern Yunnan.

2. Distributed in Heilongjiang, Jilin, Liaoning, Inner Mongolia, Hebei, Shanxi, Shaanxi, eastern Gansu, Shandong and central and southern regions.

3. Distributed in Northeast China, Inner Mongolia, Shanxi and other places.

4. Distributed in Zhejiang, Jiangxi, Fujian, Taiwan, southern Hunan, Guangdong, Guangxi, Sichuan, Guizhou, and Yunnan.

5. Distributed in southern Shaanxi, southern Gansu, Yixing, Jiangsu, southern Anhui, Zhejiang, Jiangxi, Fujian, Taiwan, Hunan, Guangdong, Guangxi, Sichuan, Guizhou, and southeastern Yunnan.

Meridian tropism:

1. "Compendium of Materia Medica": "Enter the Taiyang Meridian of Foot."

2. "Compendium of Materia Medica for Truth": "Enter the Urinary bladder, enters intestines, stomach and other meridians. "

3. "Materia Medica Zaixin": "enters lung and kidney meridians."

Nature and flavor:

1. "Kaibao Materia Medica": "Bitter, warm, non-toxic."

2. "Pearl Sac": "Sweet."

3. "Gangmu": "The taste is slightly pungent and salty."

4. "Ben Jing Feng Yuan": "Bitter and pungent, warm, slightly poisonous."

Properties:

The rhizome is columnar, 1.5-10cm long and 0.3-1.5cm in diameter; the surface is light brown; the stem base remains at the top; the texture is tough and the cross-section is fibrous; there are many fine roots growing on the lower side. The root is slender and cylindrical, slightly curved, 7 to 15 cm long and 0.1 to 0.3 cm in diameter; the surface is dark brown with fine vertical lines, and some of the bark peels off, revealing yellowish white wood; the texture is hard and brittle, easy to break, and the cross section The bark is wider, the wood is light yellow, slightly square, and there are often cracks between the bark and the wood. The smell is slight and the taste is light.

Clematis clematis: The rhizome is short columnar, 1 to 4cm long and 0.5 to 1cm in diameter. The root is 4-20cm long and 0.1-0.2cm in diameter; the surface is tan to brown-black; the cross-section of the wood is round. It tastes salty.

Northeast Clematis: The rhizome is columnar, 1 to 11cm long and 0.5 to 2.5cm in diameter. The roots are relatively dense, 5 to 23 cm long and 0.1 to 0.4 cm in diameter; the surface is brown and black; the cross section of the wood is nearly round. It tastes spicy.

Pharmacological effects:

1. Effect on the circulatory system

Clematis angustifolia (Polygonum) 50% infusion (1 ml/kg ) can lower the blood pressure and kidney volume of anesthetized dogs, and its decoction is only half as effective as the infusion. It has an inhibitory and then stimulating effect on the isolated toad heart. The medicinal effect of its infusion seems to be about 3 to 5 times greater than that of the decoction. Its antihypertensive effect may be related to inhibition of the heart.

2. Effect on smooth muscle

Clematis angustifolia decoction has an obvious stimulating effect on the isolated intestinal tract of mice, which may be a direct effect on smooth muscle. It also has similar effects on the isolated intestines of rabbits; it has no obvious effect on the isolated uterus of mice.

3. Antidiuretic effect

Clematis angustifolia preparations have significant antidiuretic effect on mice, rats, and guinea pigs. This effect is roughly equal between infusion and decoction; 0.2 ml of 50% decoction is approximately equivalent to the antidiuretic effect of 0.1 unit of pituitaryin, and its action time seems to be longer than that of pituitaryin. This effect It may also be related to decreased blood pressure and renal vasoconstriction.

4. Hypoglycemic effect

Clematis infusion can significantly enhance glucose assimilation in normal rats (that is, after giving rats a large amount of glucose, the urine glucose test is still negative), so it may have a hypoglycemic effect.

5. Other effects

Intraperitoneal injection of 0.025g/10g (minimum lethal dose of 1/8) Clematis (unidentified species) decoction can slightly improve the symptoms of mice Pain valve (hot plate method), so it may have analgesic effect. 1:3 water immersion agent has some inhibitory effect on skin fungi in the test tube. The white flowering plant (Pulsatilla cerevisiae) extracted from Clematis of Central China (white flower vine, the variety has not been identified) has antibacterial effects. Another water extract of Clematis also contains proto-Pulsatilla, which may be an antibacterial component.