A SURVEY OF ISOETES COROMANDELINA L. F. POPULATIONS IN TIRUNELVELI DISTRICT

The genus Isoetes is a cosmopolitan genus found around the world. The genus consists of aquatic or semi-aquatic plants needing water for survival. The distribution of Isoetes coromandelina L. f. in the freshwater ponds of Tirunelveli district was studied. The results of the survey show that the population of Isoetes coromandelina in Tirunelveli district are healthy and flourish wherever non-polluted, nutrient poor waters are available. Although there is no danger to the  populations of Isoetes at present, water pollutioncould endanger the survival of the species.