5.生态习性有些品种,其植物形态或生药形态相似,本草文献描述简单而不能从形态的描写考定其品种者,应注意其生态习性方面的叙述。例如白前、白薇商品极为混乱,异物同名品有20余种,其疗效不同,且有颠倒错用的现象,情况极为严重。查本草对其形态描述,极为简单,仅谓“根如牛膝,或如细辛……”,很难理解与分辨,故长期以来,对孰为正品,各家见解不一,诸说纷纭,莫衷一是,毫无定论,其混乱现象,自属必然。关于确定白前、白薇正品的问题,其关键之处在于调查其生态习性。 5. Ecological habits Some varieties, their plant morphology or crude drug morphology are similar, the description of the herbal literature is simple and can not determine its species from the description of the morphology, should pay attention to the description of its ecological habits. For example, the products of Baiqian and Baiwei are extremely confusing, and there are more than 20 kinds of foreign objects with the same name. Their curative effects are different, and there are phenomena of inversion and misuse. The situation is extremely serious. Investigating the shape of the materia medica is extremely simple. It only means that “such as Achyranthes, or Asarum ...”, it is difficult to understand and distinguish, so for a long time, it is genuine, different opinions, different opinions. There is no conclusive and inconclusive argument. Its confusion is its own necessity. The key to determining Baiqian and Baiwei’s authenticity lies in investigating its ecological habits.