سمیه قنبری همدانی - Department of Biology, Faculty of Science, Islamic Azad University, N. Tehran Branch, Tehran, Iran E-mail: sgh_۶۰_bo@yahoo.com
فریبا شریف نیا - Department of Biology, Faculty of Science, Islamic Azad University, N. Tehran Branch, Tehran, Iran
فیروزه چلبیان - Department of Biology, Faculty of Science, Islamic Azad University, N. Tehran Branch, Tehran, Iran

In this research, five species of genus Polystichum, belong to Aspidiaceae, namely, P. lonchitis, P. woronowii, P. setiferum, P. braunii and P. aculeatum, gathered from Gilan and MazandaranProvinces were anatomically studied. To distinguish anatomical character of different growing organs such as pinnules, rachis, rhizumes and roots, the cross section was prepared. Based on these researches, identification key was made and the results were shown with most differences in shape and size of xylem in rachis sections.

Anatomy, Polystichum, Iran