Abeywickrama, B.A.2012-04-042012-04-041964Ceylon Journal of Science (Biological Sciences)5(1)pp.18-29https://dl.nsf.gov.lk/handle/1/7666Biological SciencesClimateSoilsVegetationFernsPsilotaceaeLycopodiaceaeSelaginellaceaeOphioglossaceaeMarattiaceaeSchizaeaceaeHymenophyllaceaeGleicheniaceaePteridaceaeDavalliaceaeCyatheaceaeAspidiaceaeBlechnaceaeAspleniaceaeForestsArticle