1、A cuspidate leaf apex.
2、Objective:To study the influence of temperature and alcohol concentration on extraction efficiency on extraction anthraquinone glycoside from polygonum cuspidate.
3、Leaves diffuse along the stem or subrosulate, oblanceolate, cuspidate, 3 – 6 x 1 – 2,4 cm, 6 - 8 mm thick, green, margin red.
4、Leaves obovate-spatulate, cuspidate, 1,5 – 3 x 0,8 – 2,5 cm wide at the widest part, glaucous bluish-grey, often red-flecked beneath, margins reddish.
