Large white straw hat

[ ] Herb of Field Groundsel English name
[ source ]
Medicine medium source: as the Compositae Tano Chisatohikaru entire grass.
Latin botanical name: Senecio oryzetorum Diels animal fossil.
Harvest and storage: summer and autumn harvest, clean, fresh.
[ ] the original morphology field groundsel herb, high 20-40cm. Stems erect, upper part or all of much branched, retrorsely puberulent or subglabrous. Ye Husheng; leaf blade pinnately parted or undivided, long 4-8cm, wide 1-3.5cm, lobes 3-5on, begin, many bar, margin sparsely teeth or without teeth, base often expand clasping auricle, slightly fleshy, glabrous; the upper lobe often bar. Capitate, most, in stem and branch end arranged in a corymbose; peduncle slender, with strip short bract; involucral subcampanulate, length 6-8mm, diameter 4-5mm; involucral bracts15-18, linear, margin membranous, apex acuminate, base with short bracts; flower about 10, tongue little, ca.5mm; at most, yellow, apex5 crack. Achenes, cylindrical, was short, as long as 2.5mm; crested white, ca.3mm. Florescence spring, summer.
[ ] habitat distribution
Ecological environment: born in the hillside wasteland, village road.
Resource distribution: distribution in Qinghai, Yunnan, Sichuan, expensive.
[ ] the chemical composition containing alkaloids ( Senecio alkaloids ).
[ ] toxicity
1on the liver toxicity of Senecio alkaloid main toxicity for cause liver lesions, cattle, horses, sheep, pigs, chickens, geese and other food can be toxic, cause of death. Acute poisoning is a serious liver damage, necrosis; chronic poisoning is the degeneration of liver cirrhosis, ascites, and even coma, until die. The main lesions may be central hepatic lobular vein occurred in partial or complete obstruction, named hepatic veno-occlusive disease ( V.O.D. or HepaticVeno-occlusiveDi-sease ), there are also the central lobular liver hemorrhagic necrosis of liver cells, cytomegalovirus disease ( Megalocytosis ). Humans also have eat this plant and sick report.
2other effect of this class of alkaloids on lung severe toxicity, has recently attracted attention. They also can harm both tubular and glomerular; intravenous injection can cause high blood pressure, seizures, uterine contractions, intestinal relaxation. The effects of choline phthalate (Carbachol) by rat and rabbit isolated intestine spasm, the alkaloids in Senecio Senecio Philippines Ling Ling base, base of spasmolytic effect is strongest; their N- oxide, the general lost the anticholinergic action; double fused pyrrole ring saturation, but can increase the activity. Some alkaloids ( heliotrope heliotrope, hairless alkali alkali ) on the neuromuscular junction ( rat, cat ) have a blocking effect, and ten hydrocarbon quaternary ammonium similar, such as low concentration or the role beginning with enhanced contraction phenomenon; but there are also differences, such as curare cannot antagonize the inhibition. No inhibition on cholinesterase. In addition, according to its cause of rat liver, lung parenchymal cells increased and the giant nucleation, anti tumor effect, can cause genetic mutations in Drosophila melanogaster ( Drosophilamelanogaster ), plants and rat cells chromosome breakage, rat fetal malformation, so that it has the interference effect on cell division; in in vivo and in vitro, the class of some alkaloids and their metabolites ( pyrrole derivatives ), are strong alkylating agent, so some people think that, double thick pyrrole on hepatic, pulmonary, vascular endothelial cell toxicity and other effects, both related with hydrocarbon.
[ ] the alkaloids from identification of liver toxicity, in chemical structure must have3:1raw alkaline due to double bond of Senecio; saturated as broad-leaved jacobine ( Platyphylline ) no liver toxicity. 2years on the original base of alcohol-based must esterification, especially the formation of cyclic esters, are toxic. 3 ester side chain, at least one branch of carbon chain. Senecio raw alkali itself and non-toxic.
[ ] taste sweet; flat; toxic
[ ] functions of clearing away heat and toxic material. Primary pediatric white

nape; furuncle
[ usage]: the amount of external, fresh goods ramming enough or Daozhi paint.
[ ] the paper" Guizhou": heat-clearing and detoxifying herbs. Treatment of infantile white nape, furuncle.

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