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Hu Lu Ch'a



 

Tadehagi triquetrum (syn Desmodium triquetrum, Hedysarum triquetrum, Pteroloma triquetrum) 

Family: Fabaceae 

Names: Trefle Gros 

Description: Shrubs or subshrubs. Stem erect, 1--2 m tall. Leaves 1-foliolate; petiole 1--3 cm, wing 4--8 mm wide; blade narrowly lanceolate to ovate-lanceolate, 5.8--13 X 1.1--3.5 cm, usually more the 3 X as long as wide, abaxially pubescent along midvein and lateral veins, adaxially glabrous, base rounded or shallowly cordate, apex acute or acuminate. Inflorescences 15--30 cm, 2- or 3-flowered at each node. Pedicel 2--6 mm, with spreading minute hooked and silky hairs. Calyx broadly campanulate, ca. 3 mm. Corolla pink to bluish or reddish purple, 5--6 mm; standard nearly orbicular, emarginate at apex; wings obovate, auriculate, clawed; keel petals arcuate, auriculate, clawed. Stamens diadelphous. Ovary densely puberulent except at upper part of style. Pod 5--8-jointed; articles not reticulate veined, densely yellowish or whitish strigose. Seed transversely broadly elliptic or elliptic, 2--3 X 1.5--2.5 mm. Fl. Jun-Oct, fr. Oct-Dec. 2n = 22.  Found in waste places, forest margins, roadsides; below 1400 m. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Jiangxi, Yunnan [Cambodia, India, Laos, Malaysia, Myanmar, Sri Lanka, Thailand, Vietnam; Pacific Islands, New Caledonia, N Australia]. 

Properties: Leaves: antiimflammatory, diuretic, antipyretic, stomachic 

Constituents: Prenylated isoflavones, triquetrumones A, B, and C, and prenylated biisoflavanone (triquetrumone D), along with 16 other compounds: cyclokievitone, yukovanol, aromadendrin, kaempferol, astragalin, 2-O-methyl-L-chiro-inositol, galactitol, p-hydroxycinnamic acid, ursolic acid, betulinic acid, -sitosterol, daucosterol, stigmasterol, stigmasta-5,22-dien-3-O- -D-glucopyranoside, saccharose, and docosanoic acid.  

Medicinal Uses: Whole plant: expels intestinal worms; treats spasms in infants, indigestion, piles, abscesses. Whole plant decoction is drunk as hematinic and used medicinally as an antipyretic, diuretic, for invigorating the spleen, and promoting digestion.  Leaves employed as a tonic and hemorrhoid remedy. 

Research: The ethanol extract of the dried leaves of Desmodium triquetrum was studied for wound healing effect using incision, excision and dead space wound models in rats. Significant increase in wound contraction rate, skin breaking strength, granuloma strength and dry granuloma weight and significant decrease in epithelization period was observed. The prohealing actions seemed to be due to increased collagen deposition as well as better alignment and maturation. 

References:
An Illustrated Dictionary of Chinese Medicinal Herbs
, Wee Yeow Chin & Hsuan Keng, 1992; CRCS Publications; ISBN: 0-916360-53-6 

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