科研之友
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摘要
this work presents the inventory of the pteridophytes from pedra de itacoatiara. this area is formed by rock outcrop and belongs to parque estadual da serra da tiririca, on the coast of niter車i, rio de janeiro state, brazil. twenty four species were registered, belonging to 15 genera and nine families. the families aspleniaceae, blechnaceae, dennstaedtiaceae, lycopodiaceae, polypodiaceae, pteridaceae, schizaeaceae, selaginellaceae and thelypteridaceae were registered in this area. the richest family was pteridaceae with eight species and five genera (adiantum, adiantopsis, doryopteris, hemionitis and pityrogramma). the richest genera were anemia (four species) and selaginella (three). a key is provided for species identification. geographic distribution and attributed usages are also given, as well as comments about ecological features. thirteen species are useful to men (medicinal, feeding, ornamental, folklore rituals and cosmetic) and two are toxic.
