Arunachal Pradesh in NE India, the land of the rising sun, is a Paradise for botanists, still largely unexplored. In the west part of the state, the Se La straddles the Himalayan range at 4200 metres above sea level. Being the only alpine area in Arunachal accessible by road, it is far better known than the high elevations of the central and east parts of the state. Despite this, numerous novelties have been discovered in the past decade: species new to Arunachal Pradesh, to India or to science (one of them described herein). Certainly additional novelties will turn up with more research. This book aims to satisfy the need for a quick reference guide to the flora of the Se La, that will benefit students, researchers, tourists and budding botanists of the region. It depicts in colour 280 species in 128 genera of vascular plants, with emphasis on summer- and autumn-flowering herbs. Woody plants