An account of family Graphidaceae (Graphidoid Graphidaceae) of Sikkim is presented here. A total of 30 species of Graphidoid Graphidaceae spread over five genera are enumerated in this paper. Of these, one species, Graphis inversa, is reported here as a new record for India and 16 species are reported here as new records for the state of Sikkim.
Sikkim, is the smallest of the North-Eastern States of India and lies between 88°00′ E to 88°55′ E longitude and 27°43′ N to 28°04′ N latitude. It covers a total area of 7,096 sq. km. The altitude ranges between 250 to 8586 m above mean sea level. The state shares its border with Nepal to the west, Bhutan to the south-east, Tibet to the north and north-east and Darjeeling district of West Bengal to the south. Politically, the state has been divided into four districts viz., North, East, West and South. The state harbours rich diversity of flora and fauna, including lichens. As part of revisionary studies on family Graphidaceae in India, specimens of the family Graphidaceae collected from different parts of Sikkim and deposited in different Indian herbaria (BSA, BSHC, LWG) were investigated. As a result, a total of 30 species of Graphidoid Graphidaceae in six genera were identified. Of these, one species was found to be a new record for India and 16 species were found to be new records for the state of Sikkim. All the identified taxa are enumerated here citing the complete list of specimens examined. The species reported as new to the State of Sikkim are marked by an asterisk (*).
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