Abstract— Grasses constitute a natural homogenous group of plants belonging to the family Poaceae (Gramineae). Undoubtedly, Poaceae forms the
most fascinating families of flowering plants, with a wide range of diversity and plays a significant role in the lives of human beings and animals. Thal
Desert of Pakistan has rich diversity in grasses and various habitats are available for their growth, and these grasses are less exploited as far as
taxonomy is concerned. In this study, morphological analysis of 29 grass species belonging to 10 different tribes was carried out. These Species were
distinguished at tribe level and at individual level by apparent morphological features such as height, leaf blade appearance, inflorescence type, ligule,
glumes, lemma, palea , number of awn extensions etc. Arundo donex belonging to tribe Arundineae has lacerate membranous ligule which is a unique
characteristic from other members of same tribe. Tribe Aristideae members have trifid awn extension. Enneapogon shimpranus, member of tribe
Pappophoreae has 9 awned lemma. These different morphological characteristics of grasses help in discriminating between closely resembling species
of Poaceae and can be used in further taxonomic studies carried out on these species.