Urethral arch

Urethral arch

(Lu Chuan Ben Cao)

[synonyms] edematous wood, huotangmu, shanmuxiang (list of medicinal plants in Guangxi), Yangjiao, heihandou, trigonocarpus (main poisonous plants in South China).

[source] it is the branches and leaves of the Leguminosae plant.

[plant morphology] the bright leaf sialopsis tree, also known as the bright leaf monkey earrings.

Shrubs or small trees, 2-10M high. The young branches, petioles and inflorescences were covered with brown short hairs. 2-pinnate compound leaves with 2-4 pinnae; 1 gland near the base of petiole, between each pair of pinnae on leaf axis and between each pair of leaflets on leaflet axis; leaflets 4-10, alternate, nearly unequal quadrilateral, elliptic or oblanceolate, 1.7-10.5 cm long, 1.2-4 cm wide, apex acute or acuminate, base cuneate. Inflorescences arranged in panicles, axillary or terminal; flowers sessile; bracts obovate or ovate, acute or acuminate; calyx campanulate, with short teeth; corolla white, 7.5 mm long, lobes 5, spatulate, acute; stamens connate about 1 / 3 of the total length, ovary sessile, glabrous. Pods banded, curved into circles, narrow between seeds, glabrous, 2-3 cm wide. Seeds black, ca. 12 mm. The flowering period is from April to June. The fruit period is from July to September.

Distributed in Guangdong, Guangxi, Sichuan, Yunnan, Fujian, Taiwan, Zhejiang and other places.

[collection] all year round.

[pharmacological action] the leaves and barks of the same plants contain a variety of alkaloids, which have effects on some specific parts of the central nervous system (possibly the subcortical center). They can prolong the hypnotic time of barbital and fight against tetrandrine and nicotine convulsions. When injected in large quantities, the alkaloids contained in them can cause convulsions in animals. Respiratory depression is the cause of death. It directly inhibits the peripheral blood vessels, because it has the effect of reducing blood pressure. It can also inhibit myocardium, smooth muscle and striated muscle. It can antagonize the effects of acetylcholine and histamine on isolated guinea pig ileum. Low concentration can increase the oxygen uptake of tissue, but high concentration can inhibit it and increase the blood glucose of rabbits.

[nature and taste] Lu Chuan Ben Cao: "cold and cool. "

[functions and indications] ① in "Lu Chuan Materia Medica": "Ye: cool blood, eliminate inflammation and promote muscle growth. Treat burns, ulcers. "

② "Guangxi medicine plant directory": "detumescence. Treatment of rheumatic pain, falls, burns. "

[usage and dosage] external use: grind the powder and apply it with oil, or decoct and wash it with water.