The Climate determines the type of plants that can exist in each region, general appearance of vegetation is referred to as physiognomy. It constitutes general structure, shape and life forms of the species comprising the vegetation and actually the classification of vegetation type has been done on the basis of physiognomy. The individual of several species in a community can be grouped in to various life forms on the basis of their physiognomy appearance and growth performance the life form of the vegetation are the product of their genetic pool and tolerance towards the climatic variation. Studies on floristic composition, species diversity and life forms were made in Burnt (BP) and unburnt (UBP) grazing lands in Dewghat forest of Koraon range, Allahabad region of U.P. About 18,4,12 and 77 species belonged to grass, sedge, legume and non-legume forbs respectively. Biological spectrum for BP and UBP indicated the preponderance of therophytes followed by Chamaephytes where formers were 5% more on BP than that of UBP, thus exposed thero-chamaephytic to phytoclimate. Species diversity ranged between 3.98 and 5.19 and there was no significant difference between BP and UBP, indication that fire did not affect much the species diversity during post burnt period.