林问荆 (ＥｑｕｉｓｅｔｕｍｓｙｌｖａｔｉｃｕｍＬ .)为木贼科木贼属植物 ,分布于朝鲜、日本、苏联、北美及中国东北的长白山地区、内蒙古等地。生于林缘、灌丛杂草中。林问荆根含问荆皂苷、微量生物碱 ,地上部分主含黄酮苷类、高级烷烃及有机酸等。林问荆全草入药 ,具有收敛 Equisetum sylvaticum L. is an Equisetum genus of Equisetum, which is distributed in North Korea, Japan, the Soviet Union, North America and Northeast China, Changbai Mountain, and Inner Mongolia. Born in forest margins, shrubs and weeds. Lin Wen Jinggen contains ginsenosides, trace alkaloids, and some of the aboveground constituents contain flavonoid glycosides, higher alkanes, and organic acids. Lin Wenjing used herbs as medicine, with convergence