Shepherd's purse

Shepherd's purse

(Tang materia medica)

[synonyms] Chou Su and Qingbai Su (rihuazi materia medica).

[source] it is the stem and leaf of Mosla, a Labiatae plant.

Plant morphology of Cardamine

Annual herb, 20-50 cm high. Stems 4-angled, upper part and rachis of inflorescence glabrous except nodes, or sparsely white long hairy. Leaves opposite; leaf blade ovate, broad ovate or rhomboid ovate, 1-3 cm long, 1-2.5 cm wide, apex acute, base cuneate, margin coarsely serrate; petiole 5-15 mm long. The raceme is 3-7 cm long, the flowers on it are not closely arranged, the rachis node of the raceme has short white hairs; the peduncle is 2-3 mm long; the calyx is bell shaped, 5-toothed, sparsely hairy, about 3 mm long, expanding when bearing fruit; the lobes are 2-lipped, and the upper lip is broad; the Corolla is lip shaped, 4 mm long, white, the upper lip is short, the top is slightly concave, and the lower lip is 3-lobed; the stamens are 4,2-degenerated; the style bears the base of the ovary. Nutlets ovoid, reticulate not obvious. It blooms in autumn.

It grows in the grass and bush by the river. It is distributed in Jiangsu, Zhejiang, Fujian, Shandong and Northeast China.

[collection] harvest in summer and autumn.

[chemical composition] the essential oil of the whole plant is 0.11-0.5%. The main components of the essential oil are methyl eugenol (about 90%), l-myrcene (about 4%) and α - caryophyllene (about 2%).

[nature and taste] Compendium: "pungent, warm, non-toxic. "

[Guijing] "Ben Cao Hui Yan": "start with, foot Yang Ming Jing. "

[functions and indications] 1. In the collection of Materia Medica, it is said that "to remove the ant fistula, apply it in pieces.". Also the main cold air diarrhea; can be lettuce, in addition to acid water between the stomach. "

② Modern practical Chinese medicine: "it is an insect repellent. "