Abstract
The paper describes the phytogeographical and ecological observations of Pteridophytes (Ferns and their allies) of Mehao Wildlife Sanctuary and would be helpful to know the ecological habitat, distributional account and evaluation of natural resources of the area. Four broad ecological categories of Pteridophytes, viz. epiphytes, terrestrials, lithophytes and hygrophilous have been recognized. Seven years study based Pteridophytic flora reveals a total of 207 species belonging to 72 genera and 35 families collected so far from Mehao Wildlife Sanctuary. Phytogeographical study indicates 67 species are common to Meghalaya and 70 species to Nagaland. Similarly 102 species and 50 species are reported as common to Western Himalayas and Western Ghats respectively.
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