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This paper describes and records 4 new records for India, namely Bulbophyllum lilacinum Ridl., Coelogyne thailandica Seidenf., Dendrobium indragiriense Schlectr. and Phraelia secunda (Bl.) Lindl. with illustrations for the first two species. Three new records for these islands, namely Ascocentrum ampullaceum (Roxb.) Schlectr., Porpax meirax (Par. & Reichb. f.) King & Prantl. and Thunia alba (Lindl.) Reichb. f. are also reported and described.
Balakrishnan et al. (Tue,) studied this question.