Interesting to see the capsule and seeds, Saroj ji. We have come across one unique population here in mainland India, we identified it as
Commelina erecta.
Eastern, northeastern India, Nepal, Bhutan and Bangladesh have more such elements with solitary to aggregate spathes, blue to mauve, lilac flowers, muricate to smooth capsules and smooth seeds. All these are mingled between C. plaudosa, C. kurzii, C. maculata, C. undulata, C. ensifolia, C. obliqua. I have tried to resolve the complex at some limit, but need more observations on the collections from the entire Indian sub-continent.
sincerely,
Mayur