An Ecological Approach to the Study of Aquatic Weeds with Special Reference to Salvinia molesta Mitchell in Indian Botanic Garden, Howrah

The study includes observations on the habit, habitat, association with other aquatic flora and growth behaviour of Salvinia molesta, a problematic weed in the lakes of Indian Botanic Garden, Howrah. The minerals and other characteristics of its aquatic media in which this species thrives and perennates have been studied to explain the differential rates of growth in its two phases which come in succession in January and June each year.