The Study Distribution and Some Ecological indices Plant species, Siahboneh Rangeland, Haraz

Flora of the Biological Society of reactions resulting in the current environment and the evolution of plants during the past. The purpose of this study was to introduce floristic list, life forms, type of Pollination and type of dispersal species of Siahbone region. This region covers about 5000 ha in the Lasem watershed Mazandarn province. Field data were collected in the spring and summer 2014. During that period, the plant species were collected and then identified based on families, genera and species using appropriate reference. The results showed that there were 137 plant species belonging to 30 families and 301 genera. The Families like Asteraceae, Poaceae, Lamiaceae had 24, 21, 17 species, respectively. According to Raunkiaer’s life form, species were as below: 51. 9% hemicryptophytes, 31.38% therophytes, 9.48% cryptophytes, 1.45% phanerophytes and 5.10% chamephytes. The chorology of species showed that 60.58 percent of species belonged to Iran-Turanian. The results of the tolerance of the species to ecological indicators showed that Humus (121 species) value 3 and (11 species) have value 1.Nutrient (86, 27 species) have value 3 and 2, respectively.also, 104 species to value 3 for pH.