Rhododendron decorum

[ source ]
Medicine medium source: Ericaceae rhododendron flower root, leaf.
Latin botanical mineral name: Rhndodendron decorum Franch.R.franchetianum animal Levl.; R.spooneri Hemsl. Et Wils.; R. Giraudiasii levl.
Harvest and storage: summer, fall by grubbing, fresh or dried and sliced. Ye Quannian collected.
[ ] the original morphology of Rhododendron decorum, evergreen shrub or small tree, up to 1-8m. Branchlets stout, glabrous, young branchlets green, early white. The foliage was born on top of branches; petiolar long 1.5-3cm, stout, nearly above the flat, sulcate; leaf blade thickly leathery, oblong or rules round form elliptic, long 5-15cm, wide 3-5cm, apex obtuse or rounded, abruptly mucronate, base cuneate or obtuse, sometimes round or subcordate : foliar glossy, lateral veins 12-16on, slender, densely textured, slightly raised on both sides. Corymbose inflorescence is very unripe,8-10 having a flower, total inflorescence rachis ca.3cm, sparsely glandular; calyx is small, cup-shaped,6-7lobed, margin sparsely glandular hairs; corolla funnel-campanulate, long 3-5M, white or rose color, sometimes with light green or pink spot inside, base hairy, lobes6-8, suborbicular, apex emarginate; stamens,12-16, unequal, filaments basally slightly hairy; ovary pistil length4-4.5cm, cylindrical room 10, densely glandular, style of green, white or pale yellow glands. Capsule cylindric, long 4cm. Florescence 4-7 month, month of fruit period 10-11.
[ ] habitat distribution
Ecological environment : in elevation (1000- )2000-3600m forests or thickets.
Resource distribution: distribution in Sichuan, Guizhou, Yunnan; Tibet.
[ ] in the leaf chemical composition containing 2 kinds of toxic components, large white toxinⅠ andⅡ, namely grayanotoxin and Ⅳ( grayanotoxin ⅣⅠand Ⅰ).
[ ] from pharmacological effects of rhododendron flower isolated large white flowers toxin toxin ⅠandⅡ, large white toxin II to1-100μ g/kg rats were given a significant antihypertensive effect, fast effect and short, after the administration of1-2minutes blood pressure down to a minimum value, generally 15minutes after the resumption of normal. Large white toxin II to intraperitoneal injection of mouse LD50for1.05mg/kg.
[ ] taste spicy; flat
[ indications ] clearing damp-heat; promoting blood circulation and relieving pain. The main whitish; belt; rheumatic pain; traumatic injury
[ usage]:3-9g orally taken decoction. External: amount, trace and apply.



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