The research was carried out in a Cerrado fragment, located in the east of Maranhão State, aiming to analyze the floristic composition and phytosociological aspects of Leguminosae species. For data collection, the fixed plots method was applied in three areas, with 10 sample units of 10m x 10m per area (30 plots), where all individuals of the Leguminosae family were inventoried. Were analyzed 29 genera and 50 species. Papilionoideae and Mimosa L. were the most representative subfamily and genus in number of species, respectively. Regarding habits, shrub type stood out with 19 species. In the vegetation physiognomy, it was observed that the most representative was Gallery Forest with 24 species. Species richness from the richness estimator (Jackknife 1) showed that the estimated specific richness for the collection sites ranged from 3.12 to 4.25, which indicates a higher potential diversity. Regarding the Maximum Diversity In (S) index, a variation of 2.89-3.09 was observed in the municipality of Coelho Neto, with values higher than the other municipalities. For the Shannon Diversity Index, the values ranged from 2.74 to 2.85, demonstrating considerable diversity in the studied areas. Regarding the dominance index (Simpson), values between 0.95-0.97 were obtained, demonstrating low species dominance. Regarding the Pielou index (J '), values were found between 0.95-0.97, which represents a good homogeneity.

Bryophytes were collected from a Cerrado fragment, located in the mu nicipality of Caxias, Maranhão/Brazil. In the study area, 175 bryophytes were distributed in 12 families (10 mosses and two liverworts), 17 genera (15 mosses and two liverworts) and 23 species (21 mosses and two liverworts). Sematophyllaceae was the most representative family w ith four species (Trichosteleum subdemissum, Microcalpe subsimplex, Brittonodoxa subpinnata, and Taxithelium planum), followed by Dicranaceae, Fissidentaceae, and Pottiaceae with three species each. The species of bryophytes in the researched area colonized substrates, such as corticolous, terrestrial, rupicolous, epixylics and casmofites. The table shows the families, species, phytogeographic domains in Brazil and colonized substrates.

The identification of the ornamental potential of plants has grown in recent years, being a worldwide trend, but still underdeveloped in Brazil, where knowledge about this diversity is incipient. Ferns and lycophytes constitute a heterogeneous group, with a diversity of habitat and morphological variations that provide them with a strong ornamental potential, which is still little explored. In this context, in order to subsidize information on the ornamental and landscaping potential of pteridophytic flora, this study aimed to carry out a floristic survey of the species of ferns and lycophytes ornamental in the municipality of Caxias, Maranhão. In order to carry out this study, collections were carried out in places selling ornamental plants, leisure and wellness areas (squares and clubs), residences, hotels and hospitals in the municipality. Ferns and lycophytes cultivated as ornamentals in the municipality of Caxias/MA are represented by 21 species (19 species of ferns and two of lycophytes) distributed in 14 genera and 10 families. Of these, nine species can be found in the municipality native flora, and two are considered exotic in Brazil. The potential of this group of plants is related to the aesthetic values of their structures and adaptive plasticity, presenting characteristics suitable for ornamental and landscape use. The present research contributes in a significant way about information about the landscaping and ornamental potential of ferns and lycophytes.

RESUMO. O estudo registrou a ocorrência de Connarus suberosus Planch para o Parque Estadual do Mirador/Maranhão/Brasil. Apresenta breve descrição, comentários taxonômicos, dados sobre o ambiente de ocorrência, distribuição geográfica e imagens in natura e herborizada da espécie. ABSTRACT. The study recorded the occurrence of Connarus suberosus Planch for the Mirador State Park/Maranhão/Brazil. Presents a brief description, taxonomic comments, data on the occurrence environment, geographic distribution and in nature and herborized images of the species.

There is limited information available on the agrobiodiversity of homegardens in Brazil. Thus research was initiated to investigate this aspect in the state of Maranhão (Brazil) during 2016. Twenty five homegardens were visited, with 105 specimens, distributed among 47 genera and 29

Located in southwestern Maranhão, the Parque Nacional da Chapada das Mesas (PNCM), with an extent of about 160,046 ha, is completely inserted in the Cerrado phytogeographic domain. The topography is characterized by a plateau formation consisting of steep hills and medium-altitude mountains with flat tops, which give the PNCM its name. We present an annotated checklist of the mosses that occur in the PNCM. Our checklist includes 26 species of pleurocarpous mosses distributed in 10 families and 22 genera and two species of cladocarpous mosses of the family Orthotrichaceae. The most species-rich families of pleurocarpous mosses were Sematophyllaceae (7 spp.), Pylaisiadelphaceae (6 spp.), and Stereophyllaceae (4 spp.). Eleven species are recorded for the first time from Maranhão and three species are recorded for the first time in the northeast region of Brazil. Taxithelium pluripunctatum (Renauld & Cardot) W.R. Buck and Trichosteleum glaziovii (Hampe) W.R. Buck, are recorded for the first time from Maranhão and the Cerrado phytogeographic domain. Our results expand the knowledge of the Brazilian bryoflora and add distribution data for a number of species in Maranhão and the northeast region.

Palavras-chave Coleção Biológica Herbários do Maranhão Popularização da BotânicaO artigo documenta e descreve de forma geral as contribuições do Herbário Professor Aluízio Bittencourt (HABIT), no mapeamento da biodiversidade e na geração de conhecimento florístico do Maranhão para profissionais, estudantes e comunidade em geral, e ainda encoraja futuros pesquisadores das diferentes áreas da ciência a inserção das coleções botânicas, como modelo de estudo. A coleção e as atividades realizadas pelo HABIT contribuem de forma direta e indireta para o conhecimento e conservação da biodiversidade local e regional do Maranhão. Assim, é necessário a realização de trabalhos que se baseiam em listas florísticas de coleções botânicas, aperfeiçoamento de profissionais para atuarem em manutenção de coleções, frente aos avanços tecnológicos e científicos. Consequentemente, é indispensável a aplicação de recursos financeiros em coleções botânicas para a catalogação e continuidades das atividades que estruturam, moldam e documentam o conhecimento da biodiversidade global.

The research aimed to know the diversity of Leguminosae in vegetational fragments of Cerrado in the state of Maranhão. Monthly expeditions were carried out in the period between September from 2016 and June 2017 for observation, collection, and identification of botanical material. A total of 68 specimens, 31 genera, and 45 species were cataloged. Of all the specimens collected, the subfamilies Papilionoideae and Caesalpinioideae were the most representative of 21 species each. As for the Life form, was observed that the prevailing growth habit was the bush type (20). Concerning to the physiognomies of the Cerrado, was observed the predominance of the species in the gallery forest environment (28). Taxonomic keys, descriptions and photo plates were elaborated with all the studied species, composing a taxonomic treatment. In this way, it can be established that the Cerrado of Maranhão possesses a diversity of species for the Leguminosae family and that the research carried out has provided a basis for later studies, since these are few for Maranhão.