Dioscorea hispida

[ ].
From 1" to" student herbal preparation.
2" south the main poisonous plants": Dioscorea hispida, tuber and branches of toxic. Including the dioscin etc..
[ ] B I Sh Pinyin name 's L, n to be strong
English name [ ] Rhizome of Hispid Yam
[ alias ] rice grain, potato, Ru mountain and potatoes, potato, ground plate, mountain park, through energetically potato King
[ source ]
Medicine source: for Dioscorea tubers of Dioscorea hispida.
Latin animal mineral name: Dioscorea hispida Dennst.
Harvest and storage: the autumn and winter, digging, remove stems and leaves and fibrous root, washed, sliced use fresh or dried.
[ ] the original morphology of Dioscorea hispida, winding herbaceous vines. Tuber size, ovate, oval or irregular, brown skin, has a plurality of elongated fibrous roots, fresh white or blue section of microstrip. Stems stout, cylindrical, for 30m, a triangular shaped prickles, early pilose, after gradual glabrous. Palmately compound leaves with 3 leaflets; petiole to 30cm, densely pilose; terminal leaflet inverted oval, obovate-elliptic, length 6-12cm, width 4-2cm, or long and wide, lateral leaflets ovate-elliptic smaller, oblique, oblique, apex acuminate, margin entire, surface slightly pilose or subglabrous. Staminate inflorescence up to 50cm long, spikes are arranged into a conical, densely tomentose; outer tepals of male, the inner wheel is larger and thicker; stamens 6, sometimes not full development. Capsule trigonous oblong, hard and leathery, length 3.5-7cm, width 2.5-3cm, densely pilose; seed two two inserted in each chamber axis top, a wing to the capsule base elongation. Flowering of 4-5 months, fr. 7-9.
[ ] habitat distribution
Ecological environment : in elevation of 1500m following the valley side in thickets or forest edges; wild or cultivated.
Resource distribution: distribution in Fujian, Guangdong, Hainan, Guangxi, Yunnan, Tibet and other places.
[ ] chemical composition containing alkaloids from alkali ( dioscorine ).
[ ] from pharmacological effects of alkaline bitter poisonous, structure and cocaine similar, function also somewhat similar to. It on rats, mice can be induced by picrotoxin like seizures, in close proximity to a convulsive dose when there is some unconsiciousness; intradermal injection on guinea pig has local anesthetic effect; can enhance the pressor effect of epinephrine on anesthetized cats; in the guinea pig ileum were retired, resistance to the action of acetylcholine on normal rat resistance; diuretic effect, 1mg is equivalent to 100 micro unit of posterior pituitary hormone on mouse peritoneal injection; median lethal dose of 60mg / kg. Protodioscin ( Dioscine ) for the two isomers of alkali hydroxide, effect nature similar to, but weaker.
[ ] the toxicity on mouse LD50 of 100mg / kg aqueous solution; unstable.
[ ] the taste of bitter cold; toxic; Xin;
[ ] heat-clearing and detoxicating detumescence functions. Primary tumors poison; syphilis; chancre; traumatic swelling and pain
[ usage] external : the amount, pound apply; or washed fried, grind end adjustable coating, boiled paste.
[ note ] ban oral.
[ ] the discussion
1" herbs of preparing to" wash rickets: apply sore, heat detoxification, and ulcer vicious bleb, detumescence.
2" south of the Five Ridges" : cure herbs recorded sore or injured, deposited back carbuncle, treat chancroid.
Excerpts from" Chinese Materia Medica" [ ]
http://chinese-herbal-medicines-directory.blogspot.com/