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钩藤主要品种茜草科植物钩藤:钩藤茎枝为圆柱形或类方柱形,直径2~6毫米。表面红棕色、紫棕色或棕褐色,有细纵纹,无毛。茎上对生两个向下弯曲的钩,有的为单钩,钩长1~2厘米,形如船锚。体轻,质硬。横切面外层棕红色,髓部淡棕色或淡黄色。气微,味淡。大叶钩藤:茎枝方柱形,两侧有较深的纵沟,直径2至毫米,表面灰棕色至浅棕色,被褐色毛。
The main varieties of Uncaria Rubiaceae Uncaria: Uncaria stems cylindrical or square columnar, diameter 2 ~ 6 mm. Surface reddish brown, purple brown or tan, with fine vertical stripes, glabrous. Stem on the students bent down two hooks, and some single hook, hook length of 1 to 2 cm, shaped like an anchor. Body light, hard. Cross-section of the outer layer of brown-red, light brown or pale yellow pith. Gas micro, light taste. Larix giganticum: stems and branches square columnar, on both sides of the deep vertical ditch, diameter 2 to mm, the surface beige to light brown, brown hair.