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Ctenitis manipurensis (Bedd.) Ching, Lindsaea javanensis Bl., L. lucida Bl. and L. orbiculata var. commixta (Tagawa) Kram. have been rediscovered after a lapse of about one hundred years during special collection tours to Manipur in February 1978, 1984 and to Arunachal Pradesh and Meghalaya in May 1982.
Dixit et al. (Tue,) studied this question.