Thank you very much for elaborating on Mimosa sp.
I am not sure if the attached pictures were of the same plant.
There were a small community at that place, spreading along railway tracks and 100 meters away from the railway tracks, inside a private unused land, inaccessible to me.
I took more than 50 pictures from 3 plants lined in a series, having a space of about 20 to 30 feet between each other, along the rail tracks. Of these 3 plants, the first two were beyond my reach and i could take only distant shots with my 5x (200mm) zoom. I could access a branch of the 3rd plant and took closer photographs.
I regret that i didn't record any leaf, leaflet, petiole, peduncle measurements and could not find any fruit.
It was a cloudy day with high wind and the sun played hide & seek. Colour variation in attached photographs resulted from variable intensity of sunlight and controlled aperture setting by myself.
The description of Mimosa diplotricha
available in the sites i cited in my post is confusing. An example : 11 to 30 pairs of leaflets on each of 3 to 10 pairs of pinnae. However, one site states leaflets sessile, opposite, lanceolate, acute - http://www.hear.org/pier/species/mimosa_diplotricha.htm
, whereas leaflets in my post, i think, not acute.
I very much wanted to ID this plant as M. himalayana, but nowhere i could found that M. himalayana is moderately sensitive, even in any thread in the group posts i browsed :-
Attaching larger pictures of the same plant or plants.
If Mimosa himalayana is a sensitive plant then my species is Mimosa himalayana.
Thank you once again,