White-backed yellow scapes erect subshrubs, about 1m high. Branches more, branches are stellate wool. Leaves alternate; petiole 3-5 mm long, stellate pilose; stipules slender, hairy, nearly as long as petiole; leaf rhombic or oblong-lanceolate, 25-45 mm long, 6-20 mm wide. To the short tip, the base is broadly wedge-shaped, the edges are serrated, sparsely stellate pilose to nearly glabrous above, grayish white stellate pilose below. Flowers solitary in leaf axils, pedicels 1-2 cm in length, densely stellate pilose, segmented above middle; cup-shaped, 4-5 mm long, stellate pilose, lobes 5, triangular; flowers yellow, ca. 1cm, Petals obovate, ca. 8 mm, apex rounded, base narrow; staminal column glabrous, sparsely glandular papillae, ca. 5 mm, style branched 8-10. Fruit hemispherical, diameter 6-7 mm, fruiting 8-10, stellate pilose, apex with 2 short awns. Flowering autumn and winter. Born in hilly areas, hillside, waterfront, ditch or roadside.

All-grass water-alcohol extracts were able to shrink the isolated small intestine of the intestine and could be antagonized by antihistamines; there was no effect on the movement of rabbit duodenum. Its leaves contain a lot of mucilage, which can be used as elixirs and lubricants. The plant does not contain bitterness, alkaloids, volatile oils, saponins and triterpenoids; it was also reported to contain ephedrine. Sida humilis of the same genus have anti-inflammatory effects on formaldehyde-induced arthritis in rats. 【Taste】 Ganxin, cool. 1 "Guangxi Herbal Medicine": slight sour taste, cool, non-toxic. 2 "Guangdong Chinese Medicine": Gan, pale. 3 Guangzhou Force "common Chinese herbal medicine manual": Gan Xin, cool. 【Analysis】 "Quanzhou Materia Medica": Into the heart, liver, lungs, large and small intestine. [function attendance - yellow calyx efficacy] heat and dampness, promoting blood circulation and pus. Treatment of flu, colds, tonsillitis, dysentery, enteritis, jaundice, blood stasis, vomiting, hemorrhoids. 1 "Guangxi Herbal Medicine": cool detoxification, swelling and pus. Leaves: Apply acne, sores. 2 "Quanzhou Materia Medica": heat scattered, cooling blood to stop bleeding, cure intestinal dysentery, blood. 3 "Guangzhou Forces" "common Chinese herbal medicine manual"): the wind to solve the table, scattered phlegm drug. Treat flu, colds, tonsillitis, enteritis, dysentery, acne. 4 Guangzhou Air Force "common Chinese herbal medicine manual": heat and dampness, pus muscle. Treat jaundice, malaria, and inflammation of the pustules.

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