Zahra karimi - Department Biology, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran
arman mahmoudi otaghvari - Department Biology, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran
habib zare - Nowshahr Botanical Garden, Agriculture and Natural Resources Research Center of Mazandaran Province, Iran
piruz azizi - Department Soil Sciences, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran

Mosses are very small plants, without the flower and vascular system. Mniaceae members are mosses that include about 10 genera and 70 species. These plants livepredominantly on soils, rocks, and in wet and shady habitats. Plagiomnium genus is one of the genera of Mniaceae family, which has 27 species. According to Akhani & Kurschner checklist, P. affine, P.cuspidatum, P.elatum, P.elipticum, P.rostratum, and P.undulatum are found in Guilan, Mazandaran and Golestan provinces.Morphometry method provides some evidence for phylogenetic analysis in order to reach better evaluation of evolution. The main purpose of this study is to identify the varieties, populations, and species of Plagiomnium in the north of Iran, as well as providing a new key for better, more correct and effective identification. In this research, populations and different species of this genus in Guilan province will be studied and also will compare in morphometry .After accurate sampling from different areas of Guilan province, desirable traits as indicators will select and will be determined. Then, statistical analysis for all obtained data will performed by using SPSS software

Moss, Plagiomnium Genus, Morphometry, Guilan