三叶青为葡萄科植物三叶崖爬藤Tetrastigmahemsleyanum Diels et Gilg的干燥块根,未见于古代本草.《植物名实图考》载“蛇附子”云:“蛇附子产建昌.蔓生,茎如初生小竹,有节.一枝三叶,叶长有尖,圆齿疏纹.对叶生须,须就地生,根大如麦冬.俚医以治小儿高热、止腹痛,取浆冲服.”再参见其附图,均与三叶青很相象.该药民间使用效果极佳,具有清热解毒、消肿止痛功能.笔者在制定省药材质量标准时采制了不同产地药材标本,对其作了生药学鉴别,现报道如下. Trifoliaceae is the dry root of Tetrastigma hemsleyanum Diels et Gilg, a vine of the family Vitaceae. It was not found in ancient herbs. “The name of the plant is a real map” contained in the “Snake Aconite” cloud: "The serpent Aconite produced and built. Newborn bamboo, there are festivals. A trifoliate, the leaves have long sharp, round teeth sparse pattern. The leaves must be born, to be born on the ground, the root is as big as Ophiopogon japonicus. To cure children with high fever, abdominal pain, take pulp blunt. Seen on the drawings, they are all very similar to Sanyeqing. The folk use effect of this medicine is excellent. It has the functions of clearing heat, detoxifying, swelling, and relieving pain. The author made a sample of medicinal herbs of different origins when formulating the quality standards of Chinese medicinal herbs. Pharmacognosy identification is reported below.