J. Bio. & Env. Sci. 2012 42 | Khan et al. RESEARCH PAPER OPEN ACCESS Biological Characteristics of plant species in Tehsil Takht-e- Nasrati, Pakistan Musharaf Khan 1,2* , Farrukh Hussain 1 , Shahana Musharaf 3 1 Department of Botany, University of Peshawar, Pakistan 2 Department of Biological sciences, Federal Government College Mardan, Pakistan 3 Department of Chemistry, Government Girls Degree College, Sheikh, Malton Mardan, Pakistan Received: 14February 2012 Revised: 24 February 2012 Accepted: 24February 2012 Key words: Life form, leaf size classes, SBC, Takht-e-Nasrati, Pakistan. Abstract A record of plant species of tehsil Takht-e-Nasrati was organized on the source of field trips conducted in diverse parts during 2009 - 2010, for all intents and purposes in spring, summer and winter. The flora consisted of 161 plant species belonging to 57 families. The biological spectrum explains that therophytes (77 spp., 47.83%), phanerophytes (40 spp., 24.85%), hemicryptophytes (30 spp., 18.63%), chamaephytes (11 spp., 6.83%), cryptophyte (03 spp., 1.86%) had rate in the investigated area. Leaf spectra of plants consisted of microphylls (52.8%), nanophylls (19.88%), megaphylls (18.01%) and leptophylls (9.32%). The study brings a conclusion that the preeminence of therophytes in the investigated area was beneath deep biotic stress and dry condition. * Corresponding Author: Musharaf Khan  k.musharaf@gmail.com Journal of Biodiversity and Environmental Sciences (JBES) ISSN: 2220-6663 (Print) 2222-3045 (Online) Vol. 2, No. 3, p. 42-47, 2012 http://www.innspub.net