Hello all Please go to the following link for the Biodiveristy of Sikkim. the book that can be downloaded freely has chapter related to Ecology, Biogeography, Trees, Flowering plants, Lichens, Pteridophytes, Orchids, fihes, fauna, etc.
http://www.sikenvis.nic.in/Biodiversity-of-Sikkim.htm I feel the link would be useful Regards Satish Pardeshi -- EACH ONE.... PLANT ONE... Satish Pardeshi Plant Taxonomist Mumbai, Pune