Morphological and Anatomical Studies on the Medicinal Material of Equisetaceae from Shandong Province / 中草药

The morphology and anatomy of two genera, five species and one variety ofEquisetaceae produced in Shandong Province were studied under light and scanning electron microscope.There are remarkble differences between Equisetum L. and Hippochatete Milde in the type of stomas, at-tachments on the surface of stoma guard cells and the number of epithelial layers; and the presence of lat-eral xylem in all vasular bundle of Equisetaceae from Shandong. The results showed that they can be identi-fied taxonomically according to their inner structual and epidermal characteristics of stem between differentgenera, but with little difference among species of same genus.