Giresun ilinde yayılış gösteren Hypericum L. (Hypericaceae) cinsinin mikromorfolojik ve anatomik özelliklerinin araştırılması

In this study the species Hypericum L. exhibiting distribution in and around Giresun were examined comparatively for micromorphological and anatomic characteristics. In anatomic examinations, cross sections from stems and leaves of the plants were examined and anatomic comparisons were made between the species. In micromorphological studies, epidermal surfaces of the stem and leaf and seed surface were examined. The micromorphological and anatomic characters were presented comparatively in tables. It was determined that the anatomic structure of the stem was almost identical in all species examined although the anatomic structure of the leaf was anatomically different. As a consequence it is seen that the characters such as structure of the stem and leaf, mesophyll type of the leaf, stoma configuration on the leaf surface (amphistomatic or hypostamatic), and canal types (type A, B and C) are the ones which will be used in systematic species discrimination.