The present book, being a revised and enlarged edition of the forest flora of the Siwalik and Jaunsar forest divisions, U.P. by U.N. Kanjilal, is the 3rd Ed. by Basant Lal Gupta. The alternations made in the present edition are firstly the inclusion of a number of woody plants known to occur in the area. Secondly, almost all species included in second edition which are not represented by speciman from the area covered by the flora, have been excluded. In the present edition 7 naturalized species have been added, viz., Malvastrum coromandelianum. Indigofera tinctoria, cassia sophera, opuntia Dillenii, Argyreia, Roxburghii, Solanum torvum and Datura fastuosa.