INTRODUCTION TO THE FLORA, LIFE FORM AND CHOROLOGY OF HORMOZ ISLAND PLANTS, S. IRAN

Hormoz Island with 41 km³ area located in south of Bandar Abbas in  Hormozgan Province in 27o 2´ to 27o 6´ N and 56o 25´ to 56o 31´ E geographical position. In this study, 191 species are introduced. These species belong to 44 families (One family of Angiosperms, 40 families of  Dicotyledones and 3 families of  Monocotyledones) and 142 genera. Of the species recognized, nine species (4.7%) are endemic to Iran. Papilionaceae with 26 species, Gramineae with 23 species and Compositae with 20 species are main families of this region. Life forms by using Raunkier method showed that, Therophytes with  47.6% (91 species) of species are the most frequent life forms. Chamaephytes with 22.5%, Hemichryptophytes with 17.3% and Phanerophytes with 9% are other life forms. High percentage of Therophytes indicates that, the area has dry and deserty climate. Geophytes with 6 species and Helophytes with one species are less important. Investigation on geographical distribution of plants species showed 44.5% (85 species) of species belong to Saharo-Sindian, 40.8% of species are common between Saharo-Sindian with others zones, 2.6% (5 species) to Irano-Touranian and 3.7% percent (7 species) to Cosmic zones.