This is the first supplement to the Catalogue of Nepalese Flowering Plants which was published in three parts by the Department of Plant Resources in 2010, 2011 and 2012. The Catalogues were prepared on the basis of the plant materials collected from Nepal by various plant collectors – national and foreign botanists and preserved in the National Herbarium of Nepal. Like the previous publications this book is also the results of work that the National Herbarium and Plant Laboratories of that Department are undertaking to fulfill one of its objectives, the preparation and publication of a Flora of Nepal. After the publications of the Catalogues in 2012 many new specimens have been added to the National Herbarium of Nepal and also many species have been named for the old unidentified specimens. As a result many species, which were not included in the Catalogues of Nepalese Flowing Plants Parts 1-3, were added to the National Herbarium. This necessitated bringing out the first Supplement of the Catalogues.
The book includes a list of 560 taxa belonging to 327 genera and 95 families including 20 new taxa for Nepal. This book, like the previous catalogues, will form a sound basis for further works and investigations on the flora, phytogeography and other aspects of vegetation studies of the country.