Bryophytes from Uei tepui (Serra do Sol), with liverworts new to Brazil and the description of Leptoscyphus incisus sp. nov.

A collection of bryophytes from Uei tepui in Mount Roraima National Park, Roraima state, northern Brazil, yielded 45 species, in 25 genera and 15 families. Twenty four species are new to state of Roraima, of which seven are new to the Brazilian Amazon domain and six species are new to Brazil: Colura rhynchophora Jovet-Ast, Frullania mirabilis J.B.Jack & Steph., Micropterygium bialatum Ful-ford, M. tumidulum Fulford, Plagiochila steyermarkii H.Rob. and Syzygiella campanulata Herzog. The liverwort Leptoscyphus incisus Gradst., F.R.Oliveira-da-Silva & Ilk.-Borg., sp. nov. is described as new to science. The new species is characterized by plants autoicous, leaves bifid to trifid and underleaves absent or rudimentary.