حامد یوسف زاده - Ph.D. student, Department of Forestry, Faculty of Natural Resources & Marine Sciences, Tarbiat Modares University, Noor, Iran
مسعود طبری - Associate Prof., Department of Forestry, Faculty of Natural Resources & Marine Sciences, Tarbiat Modares University, Noor, Iran (E-mail: : mtabari@modares.ac.ir)
اباصلت حسین زاده کلاگر - Assistant Prof., Department of Biology, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran
مصطفی اسدی - Prof., Research Institute of Forests & Rangelands, Tehran, Iran
علی ستاریان - Assistant Prof., Department of Forestry, Agriculture & Natural Resources, Gonbad University, Gonbad, Iran

Variations in fruits morphology of Tilia spp. were studied along longitudinal and altitudinal range. Ten populations of Tilia spp.from Golestan, Mazandaran and Gilan Provinces (N. Iran) were selected. After biometrical measurements and Scanning Electron Microscopic (SEM), Cluster Analysis divided the population into seven groups. Discriminat Analysis showed that among all traits studied, size of rib, thickness, density of down and fruits colour traits have outstanding role in separation of groups. 

Phenotypic variation, Scanning Electron Microscope, discriminating analysis, Systematic