全草类的饮片,由于茎叶干瘪皱缩支离破碎,鉴别较困难。提倡药工人员学习一些药用植物分类学的知识,对于全草类饮片的鉴别帮助极大,仅举数例如下: 植物地上茎有方形、圆形、六棱形等,质地坚硬或纤软,叶有对生、互生及轮生,叶片的形状、托叶的有无及花果的形态等都可作鉴别特征。蕨类植物可借助其孢子叶的形态特征来进行鉴别。种子植物,如天葵草Semiaquilegia adoxoides、荠菜花Capsella bursapastoris、菥蓂Thlaspi arvense、紫花地丁Viola yedoensis、积雪草Centella asiatica、短嘴老鹳革Geranium wilfordii The entire grass-like piece of the plant is difficult to distinguish because the stems and leaves are shriveled and shattered. Advocate for pharmacists to learn some of the medicinal plant taxonomy knowledge, for the identification of the entire grass-like pieces of great help, only the number of examples as follows: Plant stems are square, round, six prism, texture hard or soft, Leaves have opposite, alternate and whorls. The shape of the leaves, the presence or absence of stipules, and the shape of the flowers and fruits can be used as identification features. Ferns can be identified by virtue of the morphological characteristics of their spore leaves. Seed plants such as Semiaquilegia adoxoides, Capsella bursapastoris, Thlaspi arvense, Viola yedoensis, Centella asiatica, Geranium wilfordii