Synopsis Uttar Pradesh, constituting 68 districts, is one of the largest state of India spread over an area of 294411 sq. km i.e. about 9% of the total area of the country. The state has a wide altitudinal variation ranging from 300m-7817m and accordingly the varied climate that accounts for a rich and diversified flora. Till date there is no consolidated account of the flora of this state. Working out the flora of such a large state is a challenging job. This can be achieved by bringing out checklists of larger families in the initial stages. One such attempt was the publication of "The grasses of Uttar Pradesh - A checklist" by B.P. Uniyal, Bipin Balodi & Baij Nath in 1994. The present work on Cyperaceae of Uttar Pradesh is another such attempt towards bringing out the flora of Uttar Pradesh.