Resumo Foram coletadas e catalogadas 81 espécies de briófitas provenientes do município de Ubajara, localizado no Planalto da Ibiapaba, zona norte do estado do Ceará. Destas, 35 são novos registros para o estado, sendo 18 musgos distribuídas em dez famílias e 11 gêneros, 16 hepáticas em sete famílias e 14 gêneros e um antócero em uma família e um gênero. Drepanolejeunea anoplantha (Spruce) Steph., Lejeunea capensis Gottsche, Pallavicinia lyellii (Hook.) S.F. Gray, Philonotis cernua (Wilson) D.G. Griffin & W.R. Buck, P. elongata (Dism.) H.A. Crum & Steere, Brachymenium radiculosum (Schwägr.) Hampe, Bryum cellulare Hook., B. leptocladon Sull., B. limbatum Müll. Hal., Fissidens minutus Thwaites & Mitt., F. ramicola Broth. e Ptychomitrium vaginatum Besch. são novas ocorrências para a Região Nordeste e Fissidens obscurocostatus Pursell é citada pela primeira vez para o Brasil. Os resultados estão organizados na forma de tabela, com informações específicas para cada espécie.

Chapada das Mesas National Park is located in southwestern Maranhão state, Brazil and comprises several forest types characteristic of the Brazilian Cerrado. We contribute to the knowledge of the distribution of Brazilian bryoflora and provide a list of moss species of Chapada das Mesas National Park. A total of 38 species of acrocarpic mosses were found, with Fissidentaceae being the richest family with 11 species. Of the species recorded, 22 are new occurrences for the state of Maranhão, and 4 of these are new records for the Northeast Region of Brazil. Most of the species recorded are broadly distributed in Brazil (66%), while restricted species represented just 10%. The most common acrocarpic moss species were Hyophila involuta (Hook.) A. Jaeger and Octoblepharum albidum Hedw.

The shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis are widely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwide have devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparation of a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to more of the world's known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plants occurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past 12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on the algal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project that used cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals. This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plants found in one of the world's most biodiverse countries. We further identify collection gaps and summarize future goals that extend beyond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic to the country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plant groups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still unequally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the country. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades, the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, and plants from Brazil. This project also made all the information freely available online, providing a firm foundation for future research and for the management, conservation, and sustainable use of the Brazilian funga and flora.

Th e microclimatic gradient established from the forest understory to the canopy provides a range of diff erent conditions for the establishment of bryophytes along the height of a tree. We investigated epiphytic bryophyte communities of four fragments of Atlantic Forest with the aim of describing their vertical zonation and assessing diff erentiation among the communities of the diff erent fragments. In each fragment, fi ve host trees were selected from which bryophyte samples were collected in four height zones from the base to the canopy. Furthermore, 10 plots were demarcated in each fragment where bryophytes were collected from the understory. In total, 114 bryophyte species were found on the 20 sampled phorophytes, plus an additional 51 species in the understory, for a total of 165 species. Species composition of height zones diff ered signifi cantly between communities of the trunk base and the canopy. Th e samples from the understory included 77% of all species. Among all species found, 10 showed a signifi cant preference for a specifi c height. Around 70% of the bryophyte species grew as mats; this life form occurred in all trees and height zones. Th e results showed a weak, yet signifi cant, vertical gradient, which diff ers from what is usually found in the Atlantic Forest.

RESUMO-O levantamento de briófitas realizado no município de Caxias, Maranhão resultou em 34 espécies, sendo 24 pertencentes à divisão Bryophyta, distribuídas em 16 gêneros e 11 famílias, e 10 espécies pertencentes à Marchantiophyta, distribuídas em oito gêneros e cinco famílias. Das 34 espécies identificadas Barbula arcuata Griff. configura-se como novos registro para a região Nordeste do Brasil e oito são novas ocorrências para o Maranhão. Estes resultados vem enriquecer o conhecimento brioflorístico acerca das espécies de briófitas que ocorrem no Maranhão e região Nordeste do Brasil.

-(Epiphytic Bryophytes of Atlantic Forest Fragments of Reserva Ecológica Michelin, Bahia State, Brazil). The Reserva Ecológica Michelin is located in the southern region of Bahia State, Brazil. It has a total area of 3,096 ha and contains a variety of environments from Atlantic Forest such as restinga, mangrove and estuary, and important remnants of rainforest. The floristic survey of epiphytic bryophytes occurring in forest fragments of the Reserva Ecológica Michelin resulted in 206 taxa (195 species and 11 varieties), distributed in 73 genera and 25 families of epiphytic bryophytes. Of the total, 123 are liverworts, distributed in 33 genera and eight families, and 83 mosses belonging to 40 genera and 17 families. We report six new occurrences, being four for the Northeast region of Brazil and two for Bahia State. A complete listing is provided containing the occurrence of species in each fragment, the geographical distribution, worldwide and in Brazil. Keywords: floristic, liverworts, mosses RESUMO -(Briófitas Epífitas de Fragmentos de Floresta Atlântica da Reserva Ecológica Michelin, Estado da Bahia, Brasil).A Reserva Ecológica da Michelin localiza-se na região sul do Estado da Bahia. Possui uma área total de 3.096 ha e contém uma diversidade de ambientes do complexo Floresta Atlântica, como restinga, manguezal e estuário, além de importantes fragmentos remanescentes de Floresta Ombrófila. O levantamento florístico das espécies de briófitas epífitas ocorrentes nos fragmentos florestais da Reserva Ecológica Michelin resultou em 206 táxons infragenéricos (195 espécies e 11 variedades), distribuídos em 73 gêneros e 25 famílias de briófitas epífitas. Do total, 123 são hepáticas distribuídas em 33 gêneros e oito famílias; e 83 musgos pertencentes a 40 gêneros e 17 famílias. São relatadas sete novas ocorrências, sendo quatro para a região Nordeste do Brasil e duas para o Estado da Bahia. É fornecida uma listagem completa contendo a ocorrência das espécies em cada fragmento, distribuição geográfica mundial e no Brasil.

Resumo Bryophytes of occurrences in São João do Sóter, Maranhao, BrazilAbstract Bryophytes are small plants, lignified conducting vessels absent, predominantly terrestrial, being the second largest group of terrestrial plants. This study as objective to study of bryophytes occurring in the municipality of São João do Sóter, in Maranhão, elaborating the list of the species found, their types of substrates and their geographical distribution. The collects were carried out every two months, with duration of three to five days, between august 2010 and august 2011 in pre-existing tracks, in the native vegetation. The collection of the botanical material was done following the usual methodology for the group. Were found 28 species of bryophytes distributed in 18 genera and 12 families. For Anthocerotophyta was recorded only one family, and one species. Bryophyta is represented by eight families and Marchantiophyta with three families. Syrrhopodon cryptocarpus Dozy & Molk, Fissidens goyazensis Broth, e Entodontopsis nitens Mitt. W.R. Buck, are new occurrences for the state of Maranhão. The results amplify knowledge on geographic distribution of the collected species.

RESUMO -(Jungermanniales (Marchantiophyta) da Chapada da Ibiapaba, Ceará, Brasil). A Chapada da Ibiapaba, localiza-se ao norte do estado do Ceará, possuindo uma extensão de 110 km com alitudes variando entre 800 e 1100 m. No inventário fl orístico de briófi tas realizado na área, foram encontradas 15 espécies de hepáticas folhosas, pertencentes a odaem Jungermanniales, distribuídas em oito gêneros e seis famílias. Das espécies encontradas, cinco representam novos registros para o estado do Ceará e quatro para a região Nordeste. Chiloscyphus serratus (Mitt.) J.J. Engel & R.M. Schust. é citada pela segunda vez para o Brasil. São fornecidos chaves de identifi cação para as famílias e espécies, distribuição geográfi ca, comentários referentes à ambiente, substratos e caracteres taxonômicos pertinentes, além de ilustração para Heteroscyphus contortuplicatus (Nees & Mont.) Grolle. Palavras-chave: Ambientes serranos, Ceará, fl orística, hepáticas, taxonomia ABSTRACT -(Jungermanniales (Marchantiophyta) of the Ibiapaba Plateau, Ceará state, Brazil). The Ibiapaba Plateau, north zone of Ceara, Brazil, has a length of 110 km with altitudes between 800 and 1.100 m. In the bryophytes fl oristic survey conducted in the area, 15 species of liverworts were found, wich belong to the order Jungermanniales, distributed in eight genera and six families. Among the species found, fi ve represent new records for the state of Ceara and four for the Northeast region. Chiloscyphus serratus (Mitt.) J.J. Engel & R.M. Schust. is cited by the second time for Brazil. Identifi cation keys to the families and species, geographic distribution, comments on the environment, substrate and important taxonomic characters are provided for the species found. An Illustration has been made for Heteroscyphus contortuplicatus (Nees & Mont.) Grolle.