فلور، شكل زيستي و پراكنش جغرافيايي گياهان شهرستان لامرد استان فارس

Flora, life forms and geographical distribution of plants in Lamerd ranges, Fars, Iran

The purpose of this research was to identify plant species, diversity, life forms and relevant species to different sites in point of view phytogeographical in Lamerd city (27°02ʹ55"-27°53*38"N, 52o36ʹ58"-54°00ʹ36"W). The flora were surveyed in two growing seasons and identified based on relevant references. Then the life forms were determined and their proportions were compared with Raunkiaer1 s normal spectrum using Chi-square test. The position of the area related to phytogeographical classification was investigated based on geographical data and reference. We encountered 178 species belonging to 48 families and 124 genuses. According to the results obtained Compositae, Gramineae, Labiatae, Papilionaceae and Chenopodiaceae were important families in point of view of frequency species. The life forms spectrum observed was: therophytes (34.4%), hemicryptophytes (27.2%), phanerophytes (18.9%), camaephytes (14.4%), and cryptophytes (5%). Results showed that therophytes were higher than normal spectrum and phanerophytes were less than normal spectrum and the results were in agreement with drought. In geographical distribution point of view, 54 species with the most frequency (30.4%) belonged to Irano-Toruni site and 26 species (14.4%) belonged to Sahara-Sendi site. According to results of this study, it can be concluded that the research area is located in Ecoton region.