薇菜,又名桂皮紫箕,属紫箕科蕨类植物。它是一种多年生常绿或冬季干枯的草本植物,高50～100厘米。药用的根状茎粗而短,有时成短树杆状而稍稍弯曲,常有叶柄残基存留。十分奇特的是有二型叶,即营养叶和孢子叶,幼时叶柄基部密被褐色绵毛,后渐脱落,柄长20～30厘米, Osmunda japonica, also known as cinnamon purple Kei, is a purple branch Keke ferns. It is a perennial evergreen or winter herb, 50 to 100 centimeters high. Medicinal rhizomes coarse and short, sometimes into a short rod and slightly curved, often petiole residues remain. Very unique is the second type of leaves, that is, leaves and spores nutrition, petiole base is brownish brown when the dense, then gradually fall off, handle length 20 to 30 cm,