Morphological variations in Solanum viarurn Dunal in DC. Prod. 13: 240d. 18: 2. and Solanum virginianum L. Sp. PL. 187. 1758; the two similar plant species of Solanaceae exhibiting marked taxonomical similarities in vegetative stage was studied. The data collected was also statically analysed. Both exhibited identical features as being diffuse herb or under shrub, very copiously armed all over with straight, yellow, very sharp prickles. However the co-efficient of variation in the leaves of the two plant species showed marked difference and were specific for each plant. New taxonornical methods have come into play for proper identification of plant species.