Thank you Barrios for your identification, I am not having any more pictures of this speciemen. I am too thinking that it may be Ceratopteris but i am not having any idea of its species. Can you please..
Some speceis of Marsilea occurs in marshy habitats. Four leafletsare presentat the tip of the peiole which is the charascterstic feature of the Marsilea. Thank you
Surely this aquatic plant is Ceratopteris thalictroides (L.) Brongniart. It is a fern species of the family Pteridaceae. It is commonly known as oriental water fern