Greater duckweed

[ source ]" students from herbal preparation to"
Pinyin name ] [ Dà Fú Pí n
English name [ ] Herb of Waterlettuce
[ alias ] water lettuce, duckweed, day water duckweed; of algae, floating Piao, duckweed, even the flower Piao, water cabbage, hay grass, water, turning, whip and Ping Ping, grand water lotus, fertilizer, red lettuce ragweed
[ source ]
Medicine medium source: as aroid plants by Pistia stratiotes entire grass.
Latin botanical name: Pistia stratiotes L. animal fossil
Harvest and storage: the summer harvest, removed from fibrous roots, wash, fresh or dried.
[ ] the original form by Pistia stratiotes, aquatic floating herbs. There are many long overhanging root, root pinnate, intensive. Leaf clusters to generate rosette; leaf inverted triangle ', obovate, sector, and even shape pouring egg long cuneate, long 1.3-10cm, wide 1.5-6cm, apex planted capitate or rounded, base thickness, a hairy, base is particularly dense leaf fan; stretching, abaxially conspicuous bulge into the folding piece. Spathe white, long 0.5-1.2cm, tegument hairs on both sides of the middle part, narrow, oval tube, limb ovate, acute, near cucullate; spadix is shorter than the Foyan bracts, flowers unisexual with lower order; female inflorescences of flowers, the staminate flowers with stamens 2, verticillate, stamens short, Peter the generated string, stamens column width, sessile, long ovoid, slightly flattened top, anther locules 2, opposite, longitudinal fissure; female flowers single, ovary ovoid, oblique in the spadix rachis,1 rooms, ovule majority. Berries are small, oval. Seed cylindrical. Florescence 5-11 month.
[ ] habitat distribution
Ecological environment: this kind of like hot and wet environment, suitable for quiet freshwater ponds, ditches in growth.
Resource distribution: South of the Yangtze River basin around the cultivation, Fujian, Taiwan, Guangdong, Hainan, Guangxi, Yunnan has a wild.
[ character ] character identification, this product much shrinkage, all in bulk. Leaves fascicled, blade show shape of inverted deceive wedge-shaped, long 1.5-5cm, wide 1-3.5cm, apex obtuse and a microwave shape, light yellow to light green, both sides have fine white short fluff, base the Ministry is long, densely brown tomentose. Fibrous remnant. Soft, fragile. Gas micro, salty taste.
[ ] chemical composition containing apigenin glucoside and light Vitexin type carbon chain flavonoid glycosides, cyanidin -3- glycoside ( cyanidin-3-glucoside ), luteolin - glucoside (luteolin-7-glucoside ) and trace orientin ( orientin ) and Vitexin ( Vitexin ), linoleic acid ( linoleic acid ), linolenic acid ( r-linolenic, acid ) (12R,9Z,13E,15Z ) -12- hydroxyl -9,13,15- eighteen carbon three acid [ (12R,9Z,13E,15Z ) -12-hydroxy-9,13,15-octadecatrienoic ( acid],9S,10E,12Z,15Z ) -9- hydroxyl -10,12,15- eighteen carbon three acid [ (9S,10E,12Z,15Z ) -9-hydroxy-10,12,15-octadecatrienoic the acid],α- asarone (α -asarone ),24S- ethyl -4,22- cholesteric diene -3,6- two ketone (24S-ethyl-4,22-cholestadiene-3,6-dione ),11-24S- -5α - hydroxy ethylα - cholesteric -22- was3,6- two ketone (11 α -hydroxy-24S-ethyl-5α -cholest-22-en-3,6-dione -3-O- (2,4-O- ), sitosterol two acetyl -6- stearic acyl ) -β -D- glucoside [sitosterol-3-O- (2,4-O-diacetyl-6-stearyl ) - βsitosterol (2-O- -D-glucopyranoside], -3-O- stearoyl ) -β -D- xyloside [sitosterol-3-O- (2-O-stearyl ) - βsitosterol (4-O- -D-xylopyranoside], -3-O stearoyl ) - β-D- xylose glycoside [sitosterol-3-O- (4-O0stearyl ) -β -K0xylopyranoside]. Another protein ( protein ),β- carotene (β -carotene ) and polyphenol compounds ( polyphenol ).
[ ] taste spicy; cold
[ ] the lung meridian; spleen; liver by
[ ] functions of dispelling wind and appear rash; diuresis dehumidification; cooling blood and activating blood circulation. The main common cold of wind-heat; SBC rash impermeable; urticaria; heat itching spot; juice; eczema; edema; urination; rheumatoid arthritis; ecthyma; erysipelas; innominate toxic swelling; swelling and pain from injuries
[ usage]: orally taken decoction,9-15g. External: amount, trace and apply; or the decoction fumigation.
[ note ]" Nanning City drug records:" pregnant women and non real thermal factors is disabled.
[ ] the paper1" herbs of preparing to": treating liquor wind foot, pot food. Also wiping sweat stain, can dispel skin blood. " South of the Five Ridges": recorded2herbs decoction can activate blood, washed fried have an itch in one's, eliminating traumatic swelling and pain. 3" Fujian folk medicine": blood swelling, Chushi zhiyang. 4," annals of Nanning City drug": sweating fever, diuresis detumescence. Treatment of pox, erysipelas, syphilis, playing injuries.
Excerpts from" Chinese Materia Medica" [ ]


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