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Abstract The aim of this study was to conduct a floristic inventory and update the geographical distribution of Talinaceae species in Ceará state, in the Northeast Region of Brazil. The study was based on a comparative analysis of morphological characters of specimens deposited in the EAC, ESA, HCDAL, HUEFS, HUVA, HVASF, MOSS and RB herbaria, specialized literature, photos of type collections, and field expeditions conducted between March 2015 and April 2022. For the state, Talinum fruticosum and T. paniculatum have been recorded, which prefer drier vegetations, such as Stepic Savanna (Caatinga and Carrasco) and Semideciduous Seasonal Forest (Mata Seca), but also grow in areas that are more humid. The species occur in eight conservation units in Ceará: Dunas da Lagoinha and Serra de Meruoca Environmental Protection Areas, Aiuaba Ecological Station, Sobral National Forest, Ubajara National Park, Pedra da Andorinha Wildlife Refuge, Serra das Almas and Fazenda Trussú Private Natural Heritage Reserves. An identification key, descriptions, photographs, and comments about the geographical distribution, taxonomic relationships, and phenology are provided for the species.

Abstract The floristic-taxonomic survey of Clusiaceae is presented as part of the project “Flora of Ceará: knowing to conserve”. The study was based on the analysis of specimens deposited in national and international herbaria and observations of natural populations during field expeditions carried out from February, 2019 to March, 2020. The family is represented in Ceará by eight species distributed in four genera: Clusia, Garcinia, Symphonia and Tovomita. Clusia was the most representative with five species: C. ibiapabensis, C. melchiorii, C. nemorosa, C. nogueirae and C. panapanari. The other genera are represented by one species each: Garcinia gardneriana, Symphonia globulifera and Tovomita mangle. The species preferentially occur in humid environments such as Dense Ombrophilous Forest and near watercourses. Clusia ibiapabensis and C. nogueirae are endemic to Ceará, and C. melchiorii and S. globulifera are new records for the state. Only Clusia nemorosa and C. panapanari were recorded in conservations units. Identification keys, descriptions, taxonomic relationships, illustrations, and comments on the geographical distribution and phenology of the species are presented.

Abstract The present study is an integral part of the project Flora of Ceará: knowing to conserve. The goal of this work was to conduct a floristic-taxonomic survey and update the geographic distribution of the tribe Hibisceae (Malvaceae) in the state of Ceará, Brazil. The study is based on an analysis of specimens in national and international herbaria, collections made during fieldwork from January 2020 to May 2021, and literature. Eight genera and 20 species were recorded for Ceará, which mostly occur in areas of Stepic Savanna and Dense Ombrophylous Forest. Pavonia varians and P. vinosa are restricted to a single municipality. Malachra fasciata and Peltaea lasiantha are new records for the state of Ceará. Eleven species occur within 14 conservation units.

Abstract This study aimed to carry out a floristic-taxonomic survey of the Lythraceae representatives, as part of the project “Flora do Ceará: knowing to conserve”. The data were obtained via the morphologicals analysis of samples collected in the field, and collections in herbaria as well as in specialized bibliographies. In the state of Ceará, Lythraceae is represented by 15 species belonging to four genera: Ammannia (2); Cuphea (9), Lafoensia (3) and Pleurophora (1). The species were recorded in different phytophysiognomies, but they occur preferentially in the Steppic Savanna (Caatinga and/or Carrasco), in the Dense Ombrophilous Forest (Wet Forest) and in the Vegetation Complex of the Coastal Zone (Dunes and Lowland Semideciduous Forests). The taxon with the highest number of records was Cuphea campestris, which ocurrs in 26 municipalities. Eight species were recorded in ten conservation units in Ceará. Four species are endemic to the northeastern region: Cuphea campestris, C. laricoides, C. loefgrenii and Lafoensia glyptocarpa. Lafoensia glyptocarpa and L. pacari are new records for Ceará. The identification key, morphological descriptions, comments on distribution, ecology, phenology, uses, maps, and species illustrations are presented.

Abstract We present the taxonomic treatment of Evolvulus in the state of Ceará, as part of the project “Flora do Ceará: Knowing to conserve”. The study was based on the floristic-morphological analysis of specimens deposited in the ASE, CEN, EAC, ESA, HCDAL, HST, HUEFS, HUVA, HVASF, IPA, PEUFR, and UFP herbaria, specialized bibliography, typus collections available on on-line platforms, collections and field observations. In Ceará, we registered 13 species of Evolvulus: E. anagalloides, E. cardiophyllus, E. eleaegnifolius, E. ericifolius, E. filipes, E. glomeratus, E. gypsophiloides, E. linoides, E. nummularius, E. ovatus, E. phyllanthoides, E. pterocaulon, and E. sericeus. Of these, ten occur in protected areas from Ceara state. The greatest species richness for the genus (10) was registered in the open crystalline caatinga. Additionally, we present an identification key, morphological descriptions, geographic distribution, taxonomic and ecological comments, phenology and illustrations of the diagnostic characters of the species.

Abstract We examined here the diversity and distribution of Vitaceae species in Ceará state, Brazil, as part of the “Flora of Ceará Project: knowing to conserve”, analyzing the morphological characters of specimens collected in the field, those available in the ALCB, BHCB, EAC, CEN, EAFM, HCDAL, HST, HUEFS, HUVA, HVASF, IAN, IPA, K, MBM, MOSS, NY, P, R, UEC, and US herbaria or in the specialized literature. We include here an identification key, occurrence maps, morphological descriptions, and comments concerning their ecology. The main morphological features for species delimiting were leaf type and symmetry, trichome and tendril types, presence or absence of streaks on branches, stipule, flower bud and fruit shape. Eleven species of Vitaceae included within two genera were recorded in Ceará: Cissus albida, C. blanchetiana, C. campestris, C. erosa, C. gongylodes, C. subrhomboidea, C. sulcicaulis, C. tinctoria, C. verticillata, C. xerophila, and Clematicissus simsiana. The species were registered in 45 municipalities, with C. erosa and C. verticillata being widely distributed. Those species inhabit different phytoecological areas in Ceará, although preferentially growing in Stepic Savanna (Caatinga). Six species occur in nine legally protected conservation areas. Ceará state holds 40.74% of the registered species of the family found in northeastern Brazil.

Abstract We examined the diversity and distribution of Caryocaraceae, Hypericaceae, and Rhizophoraceae in Ceará State, Brazil. Floristic treatments were carried out based on comparative analyses of the morphological characters of specimens from several Brazilian herbaria (ALCB, EAC, HCDAL, HST, HUEFS, HVASF, IAN, MBM, MOSS, SP, UEC and UFMT), the scientific literature, and photographs of type collections. Each family is represented here by a single species. Caryocar coriaceum occurs predominantly in the southern portion of Ceará State in typical open (cerrado) and forested savannas (cerradão). Vismia guianensis is widely distributed and occurs in several vegetation types, but mainly ombrophilous forests and savannas. Rhizophora mangle has a narrow distribution range, being recorded in coastal vegetation with fluvial and/or lacustrine influences (mangrove swamps). All three species were recorded in designated Conservation Areas. An identification key for the species, morphological descriptions, commentaries on their conservation, habitats and phenologies, as well as photographs and illustrations are provided.

Abstract We examined the taxonomic diversity of native angiosperms in the semiarid region of Ceará State, Brazil, emphasizing species occurring in Steppic Savanna. The diversity of native angiosperms comprises 120 families, 604 genera, and 1,443 species. Fabaceae was the most taxonomically diverse family, while Croton (Euphorbiaceae) was the most species rich genus (33 sp.). Steppic Savanna species account for 58% of all angiosperms recorded in Ceará State, and 41% of all species listed for that phytophysiognomy in Brazil. An update of the species richness within the Steppic Savanna of Ceará State phytogeographical area is provided, also indicating distribution data for other phytophysiognomies in Ceará.

ABSTRACT As part of an ongoing study of the taxonomy and systematics of Rubiaceae of the state of Ceará, Brazil, a new species, Faramea baturitensis, is here recognized, described, and illustrated. The new species occurs in “Serra de Baturité,” a relic of the Atlantic Forest. Detailed data on the distribution, habitat, phenology, and conservation status of the new species, as well as a key to species of Faramea in Ceará, are provided.

Abstract The taxonomic floristic survey of the Heliotropiaceae species in Ceará state is part of the “Flora of Ceará: knowing to conserve” project. The study was based on specimens deposited in national and international herbaria, relevant bibliography, images of type specimens, and field trips. Fourteen species belonging to three genera were recorded: Euploca (six spp.) was the most representative in number of species, followed by Heliotropium and Myriopus (four spp. each). Euploca paradoxa is endemic to Brazil, being a new occurrence for Ceará. Most species occur in Conservation Units, except for Euploca humilis, E. paradoxa, Heliotropium angiospermum, and H. funkiae. The species occur predominantly in dry habitats, such as Stepic Savanna (Caatinga), however some species have been recorded in more humid areas, such as Ombrophilous Forest and coastal vegetation.

Abstract This study aimed to carry out a floristic inventory and update the geographical distribution of Portulacaceae species that occur in the state of Ceará, Northeast Region of Brazil. The field expeditions for collection and observation of species were realized between March/2015 and March/2021. Six species of Portulaca have been recorded in the state of Ceará, being identified mainly by habit, margin and leaf shape, flower coloration, operculum shape, and seed ornamentation. All species occur in Conservation Units in the state of Ceará: P. elatior, P. halimoides, P. mucronata, P. oleracea, P. pilosa and P. umbraticola. The highest floristic richness was found in the Stepic Savanna, where all species were recorded. Portulaca halimoides had the widest distribution in Ceará, with 17 records, occurring in various vegetation types, especially in the Stepic Savanna. Portulaca mucronata was registered exclusively in Stepic Savanna, being the species with the lowest number of records. Identification key, descriptions, comments about the species, taxonomic relationships, phenological data and photographs of the species are presented here.

RESUMO A apicultura é uma das principais atividades econômicas do Semiárido Potiguar. Este estudo objetivou identificar as espécies vegetais mais representativas da flora melífera a partir dos etnoconhecimentos de apicultores de Marcelino Vieira, Rio Grande do Norte. A presente pesquisa é quali-quantitativa e para a coleta de dados foram realizadas observação participante, diário de campo, listas livres, questionário estruturado e turnê guiada. Como resultados, destaca-se que a apicultura no município é considerada uma atividade econômica secundária e promove a adoção de práticas conservacionistas pelos apicultores. No levantamento etnobotânico, foram identificadas 93 espécies vegetais, maioria nativas, pertencentes a 37 famílias sendo Fabaceae, Anacardiaceae, e Euphorbiaceae mais representativas. Em relação aos recursos florais, 91 espécies de plantas foram consideradas fontes de recursos, como néctar e pólen. Por fim, o uso de listas livres associadas a turnê guiada permitiu um registro mais fiel da percepção dos apicultores sobre a diversidade da flora apícola local.

Abstract This study presents the floristic-taxonomic treatment of Passifloraceae s.s. from the state of Ceará. Identifications were based on the analysis of collections deposited in national herbaria and photos of international herbarium collections, including types specimens, specialized bibliography and samples collected in the field. The family is represented in Ceará by 18 taxa of Passiflora, of which three are new records for the state: P. capsularis, P. kermesina and P. morifolia. Ten species were registered in Conservation Units in Ceará. The species occur in various types of vegetaion, but prefer more humid environments. Identification key, comments, images and distribution maps of the species are provided.

Abstract We performed the taxonomic-floristic survey of subtribe Gonolobinae for the state of Ceará, as part of the “Flora do Ceará: knowing to conserve” project. The study was based on the comparative analysis of morphological characters, specialized bibliography, as well as photos of type-collections. In Ceará, six species of two genera were registered: Gonolobus rostratus, Matelea denticulata, M. endressiae, M. ganglinosa, M. harleyi, and M. nigra. Matelea ganglinosa has a broad distribution in the state, while G. rostratus, M. denticulata and M. endressiae are restricted. Matelea species were recorded in six Conservation Units and preferably dry environments (Stepic Savanna, Seasonal Deciduous Forest, and Lowland Semideciduous Forest).

Abstract This study aimed to carry out a taxonomic floristic survey of species in the genus Ditassa (Asclepiadoideae/Apocynaceae), as part of the “Flora do Ceará: knowing to conserve” project. The study was based on the analysis of morphological characters of specimens from representative herbaria for the genus. The identifications were performed using specialized bibliography and confirmed by analyzing type collections. For Ceará state, six species of Ditassa were registered: D. blanchetii, D. capillaris, D. dardanoi, D. glaziovii, D. hastata and D. hispida. The species occur in Savana (Cerrado), Stepic Savanna (Caatinga/Carrasco), Dense Ombrophilous Forest (Wet forest) and Lowland Semideciduous Seasonal Forest (Tableland forest). Only D. capillaris and D. hastata were recorded in Conservation Units.

Resumo O presente estudo faz parte da série de monografias taxonômicas realizadas para o Ceará. A partir de observações de campo e análise de materiais de herbário foram registradas 17 espécies, pertencentes aos gêneros Banara, Casearia, Prockia e Xylosma. As áreas do Norte do Planalto da Ibiapaba, Serra da Meruoca e Maciços de Baturite e Uruburetama são as mais ricas em espécies, enquanto que o maior número de registros de coletas está na Chapada do Araripe e adjacências. Chave de identificação, descrições, ilustrações, dados de distribuição geográfica e habitat são apresentados.

O presente estudo objetivou analisar e discutir a inclusão de uma metodologia ativa em sala de aula, utilizando o processo de coleta, herborização e confecção de exsicatas adaptadas, a fim de proporcionar a compreensão de conceitos de morfologia vegetal em uma escola pública de Fortaleza — CE. A percepção dos estudantes sobre o espaço externo da escola, da disciplina de Biologia e dos conteúdos de Botânica foi avaliada sob a forma qualitativa (narrativa de experiência pedagógica) e quantitativa, através de questionário semiestruturado. Dentre os resultados, destaca-se a percepção do meio externo da escola como espaço de aprendizado, além do distanciamento da disciplina de Biologia e conteúdos de Botânica do cotidiano dos alunos. As exsicatas adaptadas foram consideradas efetivas e de fácil produção, indicando que o uso de modelos de baixo custo em aulas práticas é capaz de transformar a realidade do ensino da morfologia vegetal. Isto está relacionado ao fato de os alunos se aproximarem do objeto de estudo, as plantas vivas ou secas, relacionando-as com os termos e conceitos empregados para forma e função das partes do vegetal. Concluiu-se que, por intervenção dessas metodologias ativas diferenciadas, o distanciamento dos alunos em relação às plantas pode ser minimizado, o que representa uma estratégia promissora para o ensino de Botânica.

Abstract We present the floristic treatment of the Terminalia species occurring in the state of Maranhão. This study was based on the analysis of national and international herbaria. Six species were recorded from the state: Terminalia actinophylla, T. amazonia, T. dichotoma, T. fagifolia, T. glabrescens, and T. lucida, with one endemic (T. actinophylla) to Brazil. Taxa were commonly recorded in dry Savanna environments (cerrado). Only the species Terminalia fagifolia and T. lucida occur in conservation units in Maranhão, specifically in Mirador State Park, Chapada das Mesas National Park and Ecological Sanctuary of Pedra Caída. In addition to morphological descriptions, this study includes an identification key, illustrations, and comments about taxonomic affinities, geographical distribution, ecology, conservation status, and phenology of the species.

Resumo Este trabalho apresenta o tratamento florístico-taxonômico para as espécies de Terminalia ocorrentes no estado do Piauí. O estudo foi baseado em análise de exsicatas depositadas em herbários nacionais e internacionais, bem como em observações realizadas em campo. Para o estado foram registradas sete espécies: Terminalia actinophylla, T. amazonia, T. argentea, T. eichleriana, T. fagifolia, T. glabrescens e T. lucida, sendo duas endêmicas do Brasil. Os táxons foram registrados, em geral, em ambientes secos de Savana (cerrado) e Savana estépica (caatinga). Destaca-se, ainda, que 57% (4 spp.) das espécies de Terminalia ocorrem em unidades de conservação do Piauí. O estudo fornece descrições morfológicas, chave de identificação, prancha fotográfica, ilustrações e comentários sobre as espécies.

Abstract The biota of the humid mountain ranges of the Brazilian semiarid is still poorly understood. In order to fill this scientific gap, we carried out an extensive survey along altitudinal ranges (400m - 1,000 m) on both the windward and the leeward slopes of the Baturité Mountain Range, in the state of Ceará state. We registered 400 plant species and 92 families. The Myrtaceae (36 spp.), Fabaceae (25 spp.), Rubiaceae (20 spp.) and Bromeliaceae (15 spp.) families predominated on the windward slope; while Fabaceae (19 spp.), Myrtaceae (14 spp.) and Euphorbiaceae (11 spp.) were the most abundant on the leeward slope. As we expected, the species richness of trees, shrubs, subshrubs, epiphytes and terrestrial herbs was positively correlated with the altitude (R2 > 0.60). Above 800 m, we registered 273 species exclusive to the windward slope, 81 exclusive to the leeward slope, and 46 shared species. Therefore, management actions must consider the spatial heterogeneity, distribution and taxa richness.

Abstract Although the conservation of tropical biodiversity depends on protected areas, there is still a very large ‘gap’ of knowledge on the flora of Brazilian reserves, especially in the Northeast region of Brazil. Field and herbarium surveys of the phanerogamic flora of the Ubajara National Park, located on the Brazilian Northeast, were made and analyses on phenology and dispersal syndromes were performed. 418 taxa (213 trees and shrubs, 100 terrestrial herbs, 68 climbing plants, 33 sub-shrubs, two epiphytes, one hemiparasite and one aquatic herb) were recorded. The most representative families were: Fabaceae, Malvaceae, Asteraceae, Rubiaceae and Euphorbiaceae. The annual flowering / fruiting peak hypothesis was not fully confirmed, therefore, the forest may be an important food resource for the fauna all year long (especially in the moister region). Zoochory was the predominant dispersal syndrome in the moister area, whereas, autochory and anemochory together, predominated in the drier area.

Resumo Apresentamos o levantamento florístico-taxônomico das espécies de Symplocaceae para o estado do Ceará, como parte do projeto “Flora do Ceará: conhecer para conservar”. O estudo foi baseado na análise comparativa dos caracteres morfológicos de espécimes depositados nos Herbários ALCB, EAC, HUVA, IPA, R e UPCB, bibliografias especializadas e imagens de coleções-tipo. Para o estado foram registradas três espécies de Symplocos: S. guianensis, S. nitens e, possivelmente, S. oblongifolia. No entanto, por falta de material reprodutivo não foi confirmada a identificação do último táxon. As espécies ocorrem em vegetação de Floresta Ombrófila Densa e Savana. Symplocos nitens é uma nova ocorrência para o Ceará e foi registrada em duas Unidades de Conservação no estado.

Resumo Apresentamos o levantamento florístico das espécies de Ebenaceae para o estado do Ceará, como parte do projeto “Projeto Flora do Ceará: conhecer para conservar”. O estudo foi baseado na análise comparativa dos caracteres morfológicos de espécimes depositados nos Herbários ASE, EAC, HCDAL, HUEFS, HUVA, INPA, MAC e UB, de amostras obtidas em campo, bibliografias especializadas e imagens de coleções-tipo. A família é representada no estado pelo gênero Diospyros, com três espécies: D. coccolobifolia, D. inconstans subsp. obovata e D. sericea. As espécies têm distribuição disjunta, restrita ou amplamente distribuídas em território cearense, ocorrendo em vegetação de Savana (Cerrado), Savana Estépica (Caatinga), Floresta Estacional Decidual (Mata Seca), Floresta Estacional Semidecidual das Terras Baixas (Mata de Tabuleiro), Vegetação com Influência Marinha (Restinga) e Floresta Ombrófila Densa (Mata Úmida). As três espécies foram registradas em Unidades de Conservação no estado.

Resumo Apresentamos o levantamento florístico dos representantes de Aristolochiacaeae Juss. s.s. no estado do Ceará, como parte do projeto “Flora do Ceará: conhecer para conservar”. Esse estudo foi baseado na análise comparativa dos caracteres morfológicos de espécimes depositados nos herbários ALCB, EAC, ESA, HUEFS, P, RB e SP, bibliografias especializadas e imagens de materiais-tipo. Para o Ceará foram registradas seis espécies de Aristolochia: A. birostris, A. disticha, A. elegans, A. holostylis, A. labiata e A. papillaris. As espécies no estado ocorrem preferencialmente em vegetação de savana (cerrado) e savana estépica (caatinga), com alguns registros em floresta ombrófila densa, estacional decidual e estacional semidecidual das terras baixas. Aristolochia disticha é nova ocorrência para o Ceará. Duas espécies foram registradas em Unidades de Conservação no estado.

Resumo Apresentamos o levantamento florístico de Begoniaceae no estado do Ceará, como parte do projeto Flora do Ceará: conhecer para conservar. O estudo baseou-se na análise de caracteres morfológicos de espécimes depositados nos herbários ALCB, EAC, HUEFS, HUVA, MBM, MBML, RBR e SP, complementada com bibliografias especializadas e análise de imagens de coleções-tipo. No estado, Begoniaceae está representada por quatro espécies do gênero Begonia: B. convolvulacea, B. humilis, B. reniformis e B. saxicola. As espécies ocorrem preferencialmente em vegetação de floresta ombrófila densa (mata úmida), mas ocorrem também em floresta estacional decidual (mata seca). A maior riqueza de espécies se concentra nos topos serranos úmidos do estado. Todas as espécies foram registradas em Unidades de Conservação (quatro) no Ceará.

Resumo Apresentamos o levantamento florístico de Phyllanthaceae no estado do Ceará, como parte do projeto Flora do Ceará: conhecer para conservar. O estudo baseou-se na análise de coleções depositadas em herbários e observação de populações naturais no campo. Phyllanthaceae está representada por 14 espécies e quatro gêneros: Hieronyma (2), Margaritaria (1), Phyllanthus (10) e Savia (1). A ocorrência das espécies Hieronyma alchorneoides, H. oblonga e Margaritaria nobilis, assim como Phyllanthus acuminatus, P. carmenluciae, P. caroliniensis, P. heteradenius e P. stipulatus constituem novos registros para o estado. As espécies ocorrem preferencialmente em floresta ombrófila densa (mata úmida) e savana estépica (caatinga), havendo registros em Unidades de Conservação do Ceará.

The relative importance of different community assembly mechanisms varies depending on the environment. According to the stress-dominance hypothesis (SDH), assembly mechanisms range from strong abiotic filtering to competition as the environment becomes more favourable. Most evidence for the SDH comes from studies in gradients of conditions (i.e. abiotic environmental factors that influence the functioning of organisms but are not consumed by them). However, we hypothesized that in resource gradients, competition increases as abiotic filtering becomes stronger. To test our hypothesis, we set up eight plots at different sites along an abiotic severity gradient in the Brazilian semi-arid region (BSAR). In each plot, we identified and measured each woody plant species found, and we recorded 11 functional traits of the main species, dividing the traits into alpha (competition effects) and beta (abiotic filtering effects). We investigated the presence of phylogenetic signal in the traits, the community phylogenetic and phenotypic patterns, and associated the variation in these patterns with the availability of water and soil nutrients. We found phylogenetic signal for most (91%) of the traits analysed. The phylogenetic patterns varied from clustered in stressful sites to random or overdispersed in favourable sites, and we concluded that these phylogenetic patterns were the result of historical processes influencing community assembly in different environments in the BSAR. In general, the phenotypic patterns varied from clustered at the most stressful end to random at less stressful sites. Our results show that in resource gradients, any restriction of the resource (hydric or edaphic) intensifies abiotic filtering and, at the same time, increases the competitive hierarchy among species. On the other hand, stochastic processes seem to have a stronger influence under more favourable abiotic conditions, where abiotic filtering and competition are weaker. Thus, we conclude that the SDH is not supported in resource gradients.

ABSTRACT Variation in environmental conditions during the Quaternary period served as important filters for the maintenance of vegetation types and for determining the composition of the current biota. We analyzed oscillations in the distributions of different vegetation types in Brazil during the Quaternary period using species of the genus Erythroxylum (Erythroxylaceae) because of the vast heterogeneity of habitats in which they occur. We hypothesized that it would be possible to observe geographically distinct distribution patterns of species of Erythroxylum as a result of the climate changes that occurred during the last glacial maximum (LGM) and in the last interglacial period (LIG) of the Pleistocene. We used bioclimatic variables to elaborate distribution models of 11 species under three scenarios: the current climate, LGM, and LIG. We found four plant distribution patterns in humid and semiarid climates. During the LIG, humid patterns were restricted to northeastern and central-western Brazil, while semiarid conditions maintained plant distributions in the same regions of Brazil where they occur today, although with additionanl occurrences in the northern and central-western portions of that country. During the LGM, all distribution patterns exhibited extensions towards the coast due to the exposure of the continental shelf.

Resumo Dentre os gêneros de Asteraceae destaca-se Mikania que compreende ca. 450 espécies de distribuição principalmente neotropical. Mikania é considerado monofilético e pode ser facilmente reconhecido pelos capítulos com quatro flores e quatro brácteas involucrais subentendidos por uma bráctea subinvolucral. Este estudo objetivou realizar o levantamento florístico do gênero Mikania no Ceará, nordeste do Brasil. Foram analisadas amostras dos herbários ALCB, EAC, HCDAL, HUEFS, HVASF, IPA, K, P, NY e R, consultadas bibliografias especializadas e imagens disponíveis nas bases SpeciesLink, JSTOR e Herbário Virtual Reflora, além de coletas obtidas atraves de expedições a campo. Para o Ceará foram listadas oito espécies de Mikania, das quais três são novos registros. Mikania biformis é também nova ocorrência para a Região Nordeste. Mikania elliptica e M. ternata foram coletadas em ambientes de mata úmida; a primeira possuía registros apenas para a Bahia e Minas Gerais, em áreas de Caatinga e Cerrado, e a segunda, para a Bahia e regiões Sudeste e Sul do Brasil nos domínios do Cerrado e Mata Atlântica. As demais espécies (M. congesta, M. cordifolia, M. micrantha, M. psilostachya e M. vitifolia) são amplamente distribuídas no Brasil.

ABSTRACT This work aimed to evaluate the consequences of the monthly extraction of immature leaves in survival, leaf production and reproductive performance ofCopernicia prunifera H. E. Moore palm, popularly known as carnaúba. One hundred sixty reproductive adult palms were monitored for 17 months in four extractive communities located at the coast of the state of Piauí. As a result, it was observed that leaves, flowers, fruits and seeds production were reduced in the palm submitted to 50% or 75% monthly extraction. Higher levels of extraction were followed by smaller levels in seed germination. No deaths were observed even in the group subjected to 75% monthly leaves exploration. In order not to produce damage to palm trees development it is suggested that leaf extraction rate should not exceed 25% monthly as well as pausing of extractive activity preferentially during fruit maturation.

Pseudofrenelopsis and Brachyphyllum are two conifers that were part of the Lower Cretaceous (Aptian) taphoflora of the Crato Formation, Araripe Basin, northeastern Brazil. The former genus includes, so far, P. capillata and indeterminate species, whilst the latter is mainly represented by B. obesum, the most common plant megafossil recovered from that stratigraphic unit. Here, the stem and leaf anatomy of Pseudofrenelopsis sp. and B. obesum specimens is revisited, including the first report of some epidermal and vascular traits for both taxa from the Crato Formation. Along with its paleoecological significance, the new data suggest the presence of more than one Pseudofrenelopsis species in the Aptian taphoflora of the Araripe Basin and further support the taxonomic placement of B. obesum within Araucariaceae.

This study investigated the socioeconomic aspects and environmental perception of artisans that subsists making handicrafts of the leaves of carnauba palm (Copernicia prunifera H. E. Moore) in the Delta do Parnaíba Environmental Protection Area, located in Paranaíba municipality, Piauí state. We interviewed 36 artisans belonging to communities Fazendinha, Vazantinha and Pedra do Sal, using semi-structured questionnaires. In parallel, the plant management was followed. The crafts are made by women with age ranging from 20 to 60 years and low education. They live deprived of basic sanitation, schools and public health of quality. The perception about the plant is attributed to carnauba utilitarian features. In the three communities damage to plant involves estate speculation. The artisans of Fazendinha and Vazantinha did not express a conservationist conscience, prevailing capitalist perception. In the community of Pedra do Sal, the artisans promote an environmental conservation. They contact environmental agencies and protest against the devastation of carnauba forest. It was observed that although artisans share the same activity, they have different perceptions of the environment and resource explored. Especially in the Fazendinha community is necessary construction of environmental education to promote a sustainable extraction.

The aim of this study was to identify the main cat egories of use of native plants in a rural com- munity from Caicó Municipality, Rio Grande do Norte , Northeastern Brazil. From March 2007 to August 20 08 semi-structured and structured interviews were cond ucted with 23 local specialists (woodsmen, witch do ctors, healers, growers and housewives) aged over 35. We d escribe the uses of 69 species grouped in seven cat egories which are: medicinal, food, wood, mystic , fuel, fo dder and household. The families with the largest r epresenta- tion in the interviews were Fabaceae (14 species), Euphorbiaceae (6 species), Cucurbitaceae and Cactac eae (3 species each). By calculating the value in use, it was found that Amburana cearensis (Allemão) A. C. Sm. (cumaru) and Mimosa tenuiflora (Willd.) Poir. (jurema preta) stood out as the spe cies with the highest number of citations and nominated uses. The medicinal use was related to 62 species (89.85 %). Barks and root s were the most consumed parts. The data indicate that the flora of the Potiguar Seridó has a great potential of use and that this community will often use local plant reso urces in their everyday life, for many different pu rposes. Keywords : Caatinga. Ethnobotany. Phytoterapy. Northeastern of Brazil.

ABSTRACT A new species of Borreria (Rubiaceae) from Chapada do Apodi in northeastern Brazil is described and illustrated. A distribution map, illustrations, a conservation assessment, a key to morphologically similar taxa and images of the seeds and pollen grains are provided.

No município de Rio do Fogo foi registrada, em 1976, somente através de imagens de radar, uma comunidade de Cerrado para a qual, até então, não havia estudo in loco. Algumas questões foram elaboradas sobre essa comunidade: A região delimitada e descrita por meio de imagens de radar pode ser considerada Cerrado, do ponto de vista florístico? Qual a fitogeografia das espécies registradas nessa comunidade? Há ocorrência de espécies raras, endêmicas ou ameaçadas de extinção na composição florística dessa comunidade? Para responder a estas questões realizou-se o levantamento florístico em 400 ha, no período de agosto/2007 a setembro/2009. Os dados indicaram que das 94 espécies registradas em Rio do Fogo, 73 são associadas ao Cerrado, 69 também se distribuem na Caatinga, 60 na Floresta Atlântica, 47 na Floresta Amazônica, 14 no Pantanal e 11 no Pampa. Foram listadas pela primeira vez para o Rio Grande do Norte (RN) 39 espécies; Stylosanthes gracilis Kunth (Fabaceae) e Aristida laevis (Nees) Kunth (Poaceae) são citadas pela primeira vez para o Nordeste do Brasil. Aspilia procumbens Baker (Asteraceae) apresentou distribuição restrita ao estado e insere-se na categoria criticamente em perigo; já Stilpnopappus cearensis Hubber na categoria vulnerável à extinção. Concluiu-se que essa área pode ser classificada floristicamente como pertencente ao domínio do Cerrado, podendo ser apontada como área-chave para a conservação.In the municipality of Rio do Fogo (in 1976) a savanna community was registered by radar that, until now, has not been studied in loco. Some questions were asked about this community: Is this area Cerrado, floristically? What is the phytogeography of plant species in this community? Do rare, endemic or endangered species occur in this community? To answer these questions a floristic inventory, from August 2007 to September 2009, was performed in 400 ha of this region. The data indicated that of the 94 species recorded, 73 are associated with Cerrado, 69 also with Caatinga, 60 with Atlantic Forest, 47 with Amazonian forest, 14 with the Pantanal and 11 with the Pampa flora. Thirty-nine species are first listed for Rio Grande do Norte (RN); Stylosanthes gracilis Kunth (Fabaceae) and Aristida laevis (Nees) Kunth (Poaceae) are first records for the Northeast of Brazil. Aspilia procumbens Baker (Asteraceae) showed a restricted distribution in the state and is listed as critically endangered. Stilpnopappus cearensis Hobber is listed as vulnerable to extinction. It was concluded that this area can be floristically classified as Cerrado, which points to a key area for conservation.

Studies on the floristic diversity including climbers and also research directed to survey of these species are rare in Northeastern Brazil. With the aim of contributing to the knowledge of this component in the Northeast region and provide data on the flora of Rio Grande do Norte, a floristic study was carried out in a fragment of the Semideciduous Seasonal Forest in the municipality of Parnamirim and an identification key was created for the species. 20 species were registered belonging to 19 genera and 11 families. Eight of these species are new records for the state. The richest families in species were Fabaceae (05), Dilleniaceae (03), Bignoniaceae (02), Convolvulaceae (02) and Passifloraceae (02). The sum of the representatives of these families corresponded to 60% of the total number of species recorded. Comparative analysis suggests that studies be conducted focusing the diversity of climbing in northeastern Brazil, especially because these indicate the state of conservation of forests.

This study was aimed to carried out a floristic survey in four communities that are localized in the São Miguel do Gostoso municipality - RN, focusing on the Leguminosae species and its potential use. Field research was carried out between May and October/2007, for acquire information about the use of plants and samples of them in the local communities. The study registered 102 species pertaining 73 genera and 30 families. Leguminosae/Fabaceae (25), Asteraceae (10) and Euphorbiaceae (8) were the most representative families in number of species and the genus Mimosa L. and Senna Mill., with five species each. Most species of Leguminosae (68%) have economic value and are recognized seven categories of use: medicinal (8), technology (7) fuel (8), construction (6), fodder (14), veterinary (2) and other (9). Although many species have different types of utilities, Poincianella pyramidalis (Tul.) L.P.Queiroz stood out from others by being quoted in all use categories considered.

Apresenta-se o tratamento taxonômico da família Combretaceae como parte do projeto "Flora da Paraíba", que vem sendo realizado com o objetivo de identificar e catalogar as espécies da flora local. As identificações, descrições e ilustrações botânicas foram efetuadas pela análise morfológica de amostras frescas e espécimes herborizados, com o auxílio da bibliografia e análise de tipos, complementadas pelas observações de campo. Foram registradas 11 espécies subordinadas a cinco gêneros: Buchenavia (1), Combretum (8), Conocarpus (1) e Laguncularia (1). Algumas espécies possuem distribuição restrita aos manguezais, como Conocarpus erectus L. e Laguncularia racemosa (L.) C.F. Gaertn., à Caatinga, como Combretum glaucocarpum Mart., C. leprosum Mart. e C. hilarianum D. Dietr., e a Floresta Atlântica, como Buchenavia tetraphylla (Aubl.) R.A. Howard, Combretum fruticosum (Loefl.) Stuntz e C. laxum Jacq.This taxonomic treatment of the genus Solanum is part of the "Flora da Paraíba" project which aims to identify and catalogue the species of the local flora. Botanical collections, field observations and morphological studies were done for identification, description and botanical illustration of the plant species, also supported by the literature and analysis of Brazilian and foreign herbaria, plus specimens from EAN and JPB herbaria. Twenty two species of Solanum were recorded in the state of Paraíba: Solanum agrarium Sendtn., S. americanum Mill., S. asperum Rich., S. asterophorum Mart., S. caavurana Vell., S. capsicoides All., S. crinitum Lam., S. jabrense Agra & M.Nee, S. melissarum Bohs, S. ovum-fringillae (Dunal) Bohs, S. palinacanthum Dunal, S. paludosum Moric., S. paniculatum L., S. paraibanum Agra, S. polytrichum Moric., S. rhytidoandrum Sendtn., Solanum sp., S. stagnale Moric., S. stipulaceum Roem. & Schult., S. stramoniifolium Jacq., S. swartzianum Roem. & Schult. and S. torvum Sw. Three species are new records for Paraíba: S. ovum-fringillae, Solanum sp. and S. swartzianum.

A survey was made of the plant species used in popular medicine in the coastal city of Natal, and the rural city of Santa Cruz, both in the northeastern Brazilian state of Rio Grande do Norte. Information on the medicinal properties of the plants was obtained from interviews with local residents performed between February and August, 2005 and between September and December, 2007. In each area, 100 inhabitants filled out standard forms, for a total of 300 interviews. Data was collected on the plant (popular name, part of the plant used, form of use and function) and on the population (age group, sex and schooling). We recorded 57 species distributed into 54 genuses and 34 botanical families. Regardless of schooling level, more than 50% of the respondents reported using plant species for curing a wide assortment of ailments. The most used families in terms of number of species were: Lamiaceae (seven), Euphorbiaceae (four), Myrtaceae (four), Zingiberaceae (three) and Lauraceae (three). Around 49% of the species were common to the three areas studied. The most used plant parts for preparing remedies, which are used mainly for treating respiratory diseases, were the leaves, fruits and roots. Teas are the most common form of dispensing the medicine. A table is presented containing information, especially on the use and function of the species, as described in the interviews.

Neste trabalho apresenta-se o tratamento taxonômico da família Erythroxylaceae como parte do projeto "Flora da Paraíba", que vem sendo realizado com o objetivo de identificar e catalogar as espécies da flora local. Realizaram-se coletas e observações de campo para as identificações, descrições e ilustrações botânicas, que foram efetuadas após estudos morfológicos, com o auxílio da bibliografia especializada, complementados pela análise de fotos de tipos e de espécimes de herbários nacionais e internacionais. Treze espécies do gênero Erythroxylum foram registradas para a área estudada: Erythroxylum caatingae Plowman, E. citrifolium A. St.-Hil, E. nummularia Peyr., E. pauferrense Plowman, E. passerinum Mart., E. pulchrum A. St.Hil., E. pungens O.E. Schulz, E. revolutum Mart., E. rimosum O.E. Schulz, E. simonis Plowman, E. suberosum var. denudatum O.E. Schulz e E. subrotundum A. St.-Hil. Dentre estas, seis são novas referências para o Estado.A taxonomic treatment of the Erythroxylaceae family was undertaken as part of the project "Flora da Paraíba" which aims to identify and catalogue the species of the local flora. Botanical identification and illustrations were supported by morphological studies and bibliography, analysis of the types and specimens from national and international herbaria, complemented by field observations. Thirteen species of Erythroxylaceae belonging to the genus Erythroxylum were found in Paraíba state: Erythroxylum caatingae Plowman, E. citrifolium A. St.-Hil, E. nummularia Peyr., E. pauferrense Plowman, E. passerinum Mart., E. pulchrum A. St.-Hil., E. pungens O.E. Schulz, E. revolutum Mart., E. rimosum O.E. Schulz, E. simonis Plowman, E. suberosum var. denudatum O.E. Schulz and E. subrotundum A. St.-Hil. Six of these species are new records for the state.

The objective of this study was to determine the allelopathic potential of Erythroxylum rosuliferum O.E. Schulz; Erythroxylum stipulosum; Erythroxylum cuneifolium (Mart) O.E. Schulz; Erythroxylum vacciniifolium Mart. and Erythroxylum barbatum O.E. Schulz. Bioassays were performed to examine the seed germination and initial growth of seedlings of Lycopersicum esculentum Mill (tomato) and Allium cepa L. (onion) in Petri dishes following exposure to an ethanolic extract of fresh leaves from the test species at various concentrations. The growth of the tomato and onion seedlings was inhibited with the extracts of the species tested, and significant alterations in the development of the shoots and primary roots were observed. These results suggest that the five species that were evaluated have allelopathic properties.

Resumo O estudo consistiu no levantamento florístico de Bixaceae no estado do Ceará, como parte do projeto "Flora do Ceará". Baseou-se na análise dos caracteres morfológicos de espécimes depositados nos herbários ALCB, ASE, EAC, HUEFS, HUVA, MOSS, TEPB e UFRN, bibliografias especializadas, fotos de materiais-tipo, além de coletas e observações de campo. Foram registradas três espécies em dois gêneros: Bixa (B. orellana) e Cochlospermum (C. regium e C. vitifolium). No estado, as espécies estão associadas a ambientes úmidos e secos: floresta ombrófila densa, floresta estacional semidecidual de terras baixas, savana estépica e floresta estacional decidual, inclusive em Unidades de Conservação cearenses.

Resumo Polygonaceae tem ampla distribuição no Brasil e foi registrada em diferentes domínios fitogeográficos. Os representantes desta família são reconhecidos por apresentar folhas simples, alternas e inteiras, caules e ramos com nós e entrenós bem delimitados e estípulas concrescidas que envolvem completamente o caule (ócrea). O presente trabalho teve como objetivo realizar o levantamento florístico e atualizar a distribuição geográfica das espécies de Polygonaceae ocorrentes no estado do Ceará. Para as análises morfológicas, descrições e elaboração dos mapas de distribuição foram consultadas coleções herborizadas e amostras obtidas em expedições de campo realizadas no período de março/2012 a maio/2015. As identificações foram baseadas em coleções-tipos e literatura especializada. No estado do Ceará foram registradas 13 espécies e quatro gêneros. Coccoloba (6) foi o mais representativo em número de espécies, seguido de Polygonum (5), Ruprechtia (1) e Triplaris (1). As espécies ocorrem predominantemente em ambientes mais secos como floresta estacional decidual (mata seca) e savana estépica (caatinga). Esta família constitui um importante componente da flora do Ceará, onde foram registrados 44% dos gêneros e 13,68% das espécies ocorrentes no país. Coccoloba parimensis, Polygonum acuminatum e Ruprechtia laxiflora constituem novas ocorrências para o estado.

Resumo Este trabalho apresenta o estudo florístico das Erythroxylaceae que ocorrem nas formações de canga da Serra dos Carajás, no estado do Pará, Brasil. A família é representada na área de estudo por nove espécies de Erythroxylum: Erythroxylum carajasense, E. citrifolium, E. leptoneurum, E. macrophyllum, E. mucronatum, E. nelson-rosae, E. rufum, E. squamatum e E. subracemosum. Erythroxyum carajasense e E. nelson-rosae, ambas endêmicas das formações ferruginosas da Serra dos Carajás, são avaliadas como Em Perigo (EN) de acordo com os critérios da União Internacional para Conservação da Natureza (IUCN). São apresentadas descrições morfológicas, comentários sobre distribuição geográfica e habitats preferenciais, bem como ilustrações dos principais caracteres para identificação das espécies. Adicionalmente, E. ligustrinum var. carajasense Plowman foi elavada ao nível de espécie.

Este estudo consiste no levantamento florístico de Combretaceae ocorrentes no estado do Ceará, como parte do projeto "Flora do Ceará". O estudo foi baseado na análise comparativa dos caracteres morfológicos de espécimes depositados em herbários, bibliografia, fotos de materiais-tipo, além de coletas e observações de campo. Foram registradas 17 espécies distribuídas em cinco gêneros: Buchenavia (2); Combretum (9); Conocarpus (1); Laguncularia (1) e Terminalia (4). As espécies ocorrem preferencialmente em ambientes mais secos como caatinga, carrasco e floresta estacional.

ResumoEste estudo consiste no levantamento florístico dos representantes de Krameriaceae no estado do Ceará, como parte do projeto "Flora do Ceará". O estudo foi baseado na análise comparativa dos caracteres morfológicos de espécimes depositados nos herbários EAC, HUEFS e UFRN, bibliografias especializadas, fotos de materiais-tipo, coletas e observações de campo. Foram registradas três espécies de Krameria: K. argentea, K. grandiflora e K. tomentosa. As espécies ocorrem preferencialmente em ambientes mais secos: K. argentea foi registrada no município do Crato em vegetação de cerrado (savana), e K. grandiflora em Morada Nova e Aracati em vegetação de caatinga (savana estépica); já K. tomentosa tem ampla distribuição e foi encontrada na restinga, cerrado e caatinga. Krameria grandifloraé nova ocorrência para o Ceará.

Foi realizado o levantamento das espécies de Chamaecrista Moench ocorrentes em uma área urbana no município de Natal, Rio Grande do Norte. As identificações, descrições e ilustrações botânicas foram baseadas em coletas e observações de campo, complementadas com o auxílio de bibliografias especializadas e comparação com materiais herborizados. Foram registradas dez espécies para a área. Os caracteres relevantes para a separação das espécies foram hábito, inflorescência, padrão de venação dos folíolos e tamanho do pedicelo frutífero. Quatro táxons constituem novas citações para o Estado.

Abstract To test whether the flora is organized in discrete or continuous units along a topographic gradient, three physiognomies were assessed on different soil classes in a semi-arid region of northeastern Brazil: caatinga (xeric shrubland) at altitudes from 300 to 500 m, deciduous forest at altitudes from 500 to 700 m and carrasco (deciduous shrubland) at 700 m. In each physiognomy a species inventory was carried out, and plants were classified according to life- and growth-forms. Species richness was higher in the deciduous forest (250) than in the carrasco (136) and caatinga (137). The caatinga shared only a few species with the carrasco (6 species) and the deciduous forest (18 species). The highest species overlap was between the deciduous forest and the carrasco (62 species). One hundred and four species occurred only in the caatinga, 161 only in the deciduous forest and 59 only in the carrasco. Woody species predominated in physiognomies on sedimentary soils with latosol and arenosol: 124 species occurred in the deciduous forest and 68 in the carrasco. In the caatinga on crystalline basement relief with predominance of planosol, herbs showed the highest species richness (69). Comparing the biological spectrum of Brazilian plant life-forms, the caatinga stood out with higher proportion of therophytes and chamaephytes. Considering the flora of the three phytophysiognomies studied here, we can affirm that the caatinga is a discrete floristic unit.

Resumo Apresentamos um levantamento florístico de Cleomaceae no estado do Ceará, como parte do projeto "Flora do Ceará". O estudo baseou-se na análise dos caracteres morfológicos de espécimes depositados nos herbários EAC, HCDAL, HST, HUEFS, JPB, MOSS, R e UFRN, bibliografias especializadas, fotos de materiais-tipo, além de coletas e observações de campo. Foram registradas dez espécies pertencentes a cinco gêneros: Cleome (C. microcarpa), Gynandropsis (G. gynandra), Hemiscola (H. aculeata e H. diffusa), Physostemon (P. guianense, P. lanceolatum subsp. lanceolatum, P. rotundifolium e P. tenuifolium) e Tarenaya (T. spinosa e Tarenaya curvispina). Dentre estas, Tarenaya curvispina é uma nova espécie, e Gynandropsis gynandra e Physostemon tenuifolium representam duas novas ocorrências para o estado. Em território cearense, as espécies estão associadas a ambientes úmidos (floresta ombrófila densa) e secos (floresta estacional semidecidual de terras baixas, savana estépica e floresta estacional decidual).

Resumo O presente trabalho consiste do tratamento taxonômico de Borreria para a flora do Ceará. A partir de observações de campo e análise de materiais de herbário foram registradas 11 espécies: Borreria apodiensis, B. brownii, B. capitata, B. cupularis, B. latifolia, B. ocymifolia, B. scabiosoides, B. spinosa, B. tenella, B. verticillata e B. virgata. A maioria das espécies habita a vegetação de Caatinga e nove estão em Unidades de Conservação Ambiental. B. brownii, B. spinosa e B. verticillata são amplamente distribuídas nas unidades fitoecológicas do estado. Quatro espécies apresentam ocorrência mais restrita no Ceará: B. capitata e B. cupularis (na Chapada do Araripe), B. tenella (na Serra de Ubatuba e áreas adjacentes) e B. virgata (no Planalto da Ibiapaba). B. apodiensis é endêmica do Brasil, com distribuição restrita à Chapada do Apodi. Chave de identificação, descrições, imagens, dados de distribuição geográfica e habitat são apresentados.