Abstract
Pyrrosia boothii is a rare fern of Eastern Himalayan sect with a narrow distribution and listed under the different categories of IUCN. During British Raj in India this species was reported only from Bhutan. Though there are some collections from Sikkim but they remain unnoticed for nearly a century, furthermore, there is no collection of this species from Sikkim by subsequent Indian workers. Recently present author recollected it from Sikkim after the gap of nearly 125 years. During the typification Hovenkamp cited Holotype but the species was published with syntypes which is corrected here. In present communication history, collection, taxonomy, nomenclature and typification of this rare fern are discussed in brief.
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