List of the Ferns of Simla & North Western Himalayas

In the coarse of my summer residence at Simla daring the last ten, and more particularly the last five, years, I hare availed myself of such opportunities as have offered to collect and examine the materials for a list of the local ferns. The limits of my field of work have necessarily been determined by considerations of ready accessibility, and do not extend much below 4,500 feet on the one hand...