Affiliation: | 1.Department of Botany, University of North Bengal, Siliguri 734013, West Bengal, India;2.Department of Botany, Malda College, University of Gour Banga, Malda 732101, West Bengal, India;3.Department of Botany, Asutosh College, 92, S.P. Mukherjee Road, Kolkata 700 026, West Bengal, India |