It is most important to recognize the characteristics including cylindrical section of rhizome ( yuanlu ) , drooping adventitious root tuber ( xiachuiding ) , wirelike wrinkles on tap shoulder ( tiexianwen ) and some slender pliable warty fibrous roots ( zhenvuxu ) 、主根肩部的线形收缩纹(铁线纹)及带疣状突起的细长柔韧的须根系(珍珠须)是最重要的鉴别性状。
