Abstract
In present communication, based on the detailed exploration, field observation and herbarium study, the Tree Ferns of Nicobar Islands are taxonomically discussed in detail. Only two endemic species, Cyathea albosetacea (Bedd.) Copel. and Cyathea nicobarica N.P. Balakr. & Dixit were known to occur in Nicobars Islands, but based on the detailed observation on type specimens and observation of live plants growing in type locality and other part of Nicobars both are found to be conspecific. Therefore, Cyathea nicobarica is merged here into Cyathea albosetacea. During present study, an additional south east asian tree fern Cyathea contaminans (Wall.) Copel. is found growing in Great Nicobar and reported here an addition to the Nicobar Island for the first time.
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