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The aim of this study was to document the Angiosperm diversity of five ephemeral lakes of Thiruvallur District of Tamil Nadu South India. Qualitative floristic surveys were carried out during 2005-2007. Herbarium specimens with voucher number, taxonomical and ecological information were deposited to the herbarium, Pachaiyappa’s College (PCH) Chennai, Tamilnadu. Forty five species of hydrophytes belonging to 21 families and 34 genera were documented. Most speciose families were Poaceae with 5 species followed by Polygalaceae and Nymphaeaceae (4) Cyperaceae, Hydrocharitaceae, Najadaceae, and Scrophulariaceae (3 species each). Mean depth of all five lakes shrinking gradually due to severe anthropogenic pressure. Conservation of wetlands is the need of the hour to protect the biota as well as quality of drinking water.

Angiosperms, Hydrophytes of five ephemeral lakes of Thiruvallur District, Tamil Nadu, India