The present studies on the medicinal plants of Garhwal Himalayas which include the well-known valleys of Bhilangana, Bhagirathi, Yamuna, Alaknanda and the famous valley of the flowers besides Chakrata, Tons Forest Division Mussoorie etc., have been carried out under the general scheme of Central Council for Research in Ayurveda and Siddha, New Delhi. In the text of the book 600 medicinal plants with their correct botanical name, Sanskrit/vernacular names/local names together with the specific characters of the species for their easy identification and local distribution, local use etc. have been given, special care has been taken to collect authentic data pertaining to the traditional local names of the drug (their specific usage). The author has also tried to clarify the botanical and Ayurvedic identity of some of the controversial drugs like Astavarga, Tilowak, Bhillotak, Muramani, Nirvashi, Bhutteshi, Sarpa satla etc. It is hoped that the book would be extremely useful to the Ayurvedic Vaidyas, Research Scholars, Botanists and students of various disciplines, engaged in this type of work.