【Product Name】:Polygonum Cuspidatum Extract

【Botanical Name】:Polygonum Cuspidatum

【Part used】: Rhizome/Root

【Appearance】: Brownish Yellow or White to Off-White powder

【Specification】: 4：1  10：1 /Regular Powder / Trans-Resveratrol 10-99% / Polydatin 98%

【Storage Period】: 24 Months

【Package】: 1kg/bag 25kg/drum

【Test Method】: HPLC

【Storage Conditions】: Store in cool and dry places. Keep away from strong light and heat.

Description

Perennial herbs. Rhizomes recumbent underground, woody, yellowish brown, nodes distinct. Stem erect, cylindrical, scattered with many red or purple spots, hollow. Leaves alternate, broadly ovate to suborbicular, apex mucronate, base rounded or cuneate; stipules membranous, brown, caducous. Flowers unisexual, dioecious, panicle axillary; pedicel longer, upper winged; flowers small and dense, white, perianth 5, outer wheel 3, back winged, fruiting larger; male flowers have 8 stamens; female ovary upper style 3. Achenes ovate, 3-ribbed, reddish brown, shiny, enclosed in a winged perianth. The flowering period is from June to August and the fruiting period is from September to October.

Chemical Composition

Volatile essential oils are described for the leaves, but the roots are the main plant part used traditionally. Major constituent chemicals include quinines (anthraquinone, naphthoquinone, phylloquinone) and emodin-type anthroquinones, stilbenes (resveratrol, piceatannol polydatin), flavonoids (quercetin, catechin, rutin), coumarins, lignans, and other compounds.