It's in the nightshade family (Solanaceae) and most likely the genus Solanum (nightshade) -- based on the flowers. But I don't know the species. I know there are spiny-leaved ones, for example:http://www.hear.org/starr/images/image/?q=091104-9334&o=plants
thank you Hollis!
I've seen a very similar plant in south China that was identified to me as "Indian Nightshade" Solanum violaceum
thanks Neil.. Indian nightshade it is..
It is plant from family solanaceae. Tomato, capcicum brinjal belong to this family. In marathi it is called as Kate Ringni. Its botanical name is Solanum srramonifolium. It has some medicinal uses also.....Best
thanks R. Thomas. also glad to see another geology blogger from this part of the world :) r u from Pune?