"Gentiana", the scientific name Gentiana scabraBunge is a perennial herbaceous plant of the genus Gentiana (Gentiana) in the family Gentianaceae (Gentianaceae). Its core value is root medicine, and its blue funnel-shaped flowers also have ornamental charm. As the "heat-clearing and dampness-drying medicine" of traditional Chinese medicine, it carries the classical theory of "purging liver and gallbladder fire" in traditional Chinese medicine, and is also one of the representatives of wild medicinal plants in East Asia.

Pen gentian is an annual herbaceous plant of the Gentianaceae family and Gentiana genus. The stem is upright, purple red, branched from the base, sparsely unbranched; Leaves oval or oval spoon shaped, margin cartilaginous, smooth or with indistinct fine papillae; Most flowers, solitary at the top of small branches, densely arranged in umbrella shaped branches, sparsely solitary at the top of flowers; The capsule is exposed or hidden, inverted oval shaped and rectangular in shape, with wide wings; The seeds are brown, oval in shape, with a fine mesh on the surface; The flowering and fruiting period is from April to June. Because its flowers resemble a pen tip when closed, it is named "Pen Dragon Gallbladder".