Marcos José Silva

• PhD
• Professor at Federal University of Goiás

Phyllanthus catingicola, a new species endemic to Northeastern Brazil, is here described and illustrated based on morphological data. It is known so far in the state of Ceará and is morphologically similar to P. hyssopifolioides in having a stem with non-phyllanthoid branching, secondary branches flat and discreetly winged, leaves present on the ma...

Over the last two centuries, since the treatment of Leguminosae in Flora Brasiliensis, many new legume species and genera have been described, adding to the accumulated body of knowledge on species’ circumscriptions and distribution, published in monographs, taxonomic revisions and regional floristic treatments of specific Brazilian phytogeographic...

During a floristic study in Legado Verdes Cerrado region in Goiás state (Niquelândia municipality), Brazil, a new species of Eriosema genus was discovered. Eriosema magnum is here described and illustrated and its morphological similarities with its closest relatives are presented. The geographical distribution, conservation status, and information...

Taxonomic studies on the genus Croton in the Midwest region of Brazil enabled the analysis of about 700 collections from all over the country. Three of these collections were identified as a new species, Croton piriquetifolius, which is described and illustrated here. We also give a preliminary evaluation of its conservation status, provide data on...

Phyllanthus rosellus, an endemic species from the state of Minas Gerais, Brazil, was treated under Phyllanthus niruri subsp. lathyroides. After analyzing herbarium collections, including all types related to the names P. niruri and P. rosellus, we conclude that both species are morphologically distinguishable, and consequently we propose the reinst...

During taxonomic studies on the species of Brachystele Schlechter occurring in Brazil, we provide here the typification of B. subfiliformis (Cogniaux) Schlechter, a species endemic to Brazil, and we also propose B. bicrinita Szlachetko under its synonym. Therefore, we provide the updated geographic distribution of B. subfiliformis, its conservation...

The taxonomic revision of Mimosa sect. Mimosa ser. Mimosa subser. Polycephalae resulting from the analysis of protologs and the study of approximately 450 collections, including all types, in addition to collections and observations of populations in the field, led us to identify problems of typification, concept, and circumscription for some speci...

Taxonomic studies about Ruellia from Goiás state, Brazil, ongoing, revealed a new species, R. kalungae, that it is here described and illustrated, and systematically positioned. The novel species is similar to Ruellia nitens in the subshubby erect habit, leaves light green and corolla infundibuliform. However, it differs from the latter by several...

Oxalis comprises ca. 500 species and has a tropical and subtropical distribution. This genus contains four subgenera and Oxalis subg. Thamnoxys is the most diverse in Brazil. This subgenus has 9 sections, of which section Thamnoxys is the most diverse with 28 species. This work is based on a taxonomic study of Oxalis section Thamnoxys in Brazil and...

An ongoing taxonomic work on Phyllanthus subsect. Phyllanthus , resulting from the analysis of protologues and the study of approximately 2000 collections, including all types, historical collections, and observations in the field, led us to describe two new species ( P. lobatus and P. platystigma ), and to propose the synonymization of P. mimicus...

Cyrtopodium R. Br. is a neotropical genus with 50 species, of which 37 are present in Brazil, especially in the Cerrado, its center of diversity and endemism. Works on the genus for the country are limited to classical literature, a synoptical treatment, descriptions of new species, and floristic listings. We present a taxonomic synopsis for Cyrtop...

Dichorisandra pulcherrima, a new species from the mountains of the northeastern state of Goiás, Brazil, is described and illustrated here. Its morphological relationships are discussed and compared with those of D. villosula, D. hexandra, and D. pubescens, especially with the first two, with which it is most similar. However, it differs from all of...

Cyrtopodium comprises 50 species, 37 of which are found in Brazil, with 19 being endemic. Some of the Brazilian species are morphologically similar, with similar life forms, and are often confused in herbarium collections. We tested whether the anatomical characters of the vegetative systems of eight species of the genus occurring in savanna areas...

Introdução: Vanilla Mill. é um gênero Pantropical com ca. de 110 espécies, sendo 38 delas reportadas para o Brasil, dentre as quais 20 são endêmicas. Suas espécies têm predileções por florestas e podem ser reconhecidas por serem herbáceas predominantemente hemiepífitas com aspecto lianescente, pelas folhas alternas, flores usualmente amarelas com l...

The orchid genus Brachystele Schltr. (Orchidoideae, Cranichideae, Spiranthinae) comprises 20 species distributed from Mexico to Argentina, with 10 species found in Brazil. Anatomical studies of Orchidoideae Lindl. have been scarce, and the anatomy and histochemistry of Brachystele are still largely unknown. In this study, we conducted a characteriz...

Phyllanthus megastylus, a new species endemic from Southeastern Brazil, is described here based on anatomical and macromorphological data. It is known so far from the state of Espírito Santo and is morphologically similar to P. itamarajuensis, but differs by its densely papillose branches, pink pistillate flowers, disk pistillate with undulate marg...

Erythroxylum confertifolium, a new species from the Chapada dos Veadeiros National Park, Goiás, Brazil, is described and illustrate here. It differs from E. campestre and E. parvistipulatum, its most similar congeners, by a set of morphological (e.g. branching appearance of the stem, leaf shape and consistency, numbers of setules of stipules and ca...

We describe and illustrate Phyllanthus capixaba , a new species hitherto found in the state of Espírito Santo, Brazil. This new species is assigned to P. section Phyllanthus subsect. Phyllanthus and differs from their nearest species P. longipedicellatus by a set of characters such as aspect of branch distribution on the stem, number of pairs of se...

Trichomes are key functional traits that protect plants against abiotic stresses, herbivores and pathogens. In addition to their ecological roles, trichomes show high morphological variability in many lineages, providing useful characters for species characterization and taxon delimitation. Here, we focus on trichomes in Croton, a megadiverse genus...

The orchid genus Brachystele Schltr. (Orchidoideae, Cranichideae, Spiranthinae) comprises 20 species distributed from Mexico to Argentina, with 10 species found in Brazil. Anatomical studies of Orchidoideae Lindl. have been scarce, and the anatomy and histochemistry of Brachystele are still largely unknown. In this study, we conducted a characteriz...

We describe and illustrate Croton restingae Sodré & Riina sp. nov., a new species endemic to a restricted area in the state of Rio de Janeiro, Brazil, characterized by a particular type of vegetation of the Atlantic Forest known as restinga. The new species belongs to Croton sect. Adenophylli subsect. Laceratoglandulosus, which is supported by morp...

Evolvulus comprises approximately 100 American species and is one of the largest genera in Convolvulaceae; it includes taxa that are sometimes difficult to identify; some of them have typification and taxonomic problems. Both nomenclatural and taxonomic issues were detected during the ongoing taxonomic treatment of the Evolvulus species from the no...

Collaea insignis, a new species from Midwestern of Brazil, is described and illustrated from plants recognized as C. speciosa or misinterpreted as C. aschersoniana and C. stenophylla. However, the association of the morphological (e.g., morphology of leaves, flowers and indument types), leaf anatomical (see below), and geographical (allopatric dist...

As part of the taxonomic revision of Evolvulus section Lagopodini (Convolvulaceae), a new species was found in the Brazilian Cerrado, a Neotropical biodiversity hotspot, and it is informally categorized herein as endangered. Evolvulus veadeirensis sp. nov. is characterized by the subshrub habit, slender and cylindrical stems, lanceolate leaves, lea...

Campylocentrum Benth. has a neotropical distribution and about 73 species arranged in five sections. In Brazil, it is represented by 38 species (24 endemic), concentrated mainly in the Atlantic Forest. In order to contribute to the taxonomic knowledge of the genus in Cerrado areas of Central Brazil, where it is not studied, we provide a taxonomic t...

Campylocentrum Benth. possui distribuição neotropical e cerca de 73 espécies arranjadas em cinco seções. No Brasil, está representado por 38 espécies (24 endêmicas), concentradas, sobretudo, na Mata Atlântica. Com intuito de contribuir com o conhecimento taxonômico do gênero em áreas de Cerrado do Brasil Central, onde o mesmo não é estudado, fornec...

During a taxonomic revision of Phyllanthus sect. Phyllanthus subsect. Phyllanthus, a new species was found and is being described and illustrated here. Phyllanthus longipetiolatus, known from the state of São Paulo (Brazil), belongs to the previously mentioned section and is morphologically similar to P. niruri. However, the new species differs fro...

During a taxonomic study of the species of Croton sect. Adenophylli occurring in Brazil, approximately 140 collections usually identified as Croton echioides, C. rhamnifolius or C. rhamnifolioides caught our attention due to the distinct morphology of vegetative and reproductive organs. After the analysis of these collections, we concluded that the...

Chamaecrista, one of the largest genera of Leguminosae with 364 species, had its infrageneric classification recently redefined based on phylogenetic studies, and is now divided into four sections and three subsections. The section Absus, which now includes the section Grimaldia, was subdivided into three subsections: Viscosa, Zygophyllum and Absus...

Evolvulus linarioides has frequently been confused with E. saxifragus due to overlap of their morphological characters. A careful morphological analysis of herbarium specimens and protologues evidenced no support for considering the two taxa as distinct entities. We therefore propose here the synonymization of E. linarioides under E. saxifragus , a...

Three new species of Mimosa endemic to the Brazilian Cerrado biodiversity hotspot are described and illustrated. Mimosa cavalcantina, M. gustavoi and M. venosa are assigned to subser. Polycephalae for having its diagnotic morphology, including unarmed branches, leaves with a pair of pinnae, a fimbriate paleaceous calyx, and filaments shortly monade...

Dichorisandra rigidifolia, a new species of the genus and probably endemic to the Cerrado Phytogeographic Domain, is described and illustrated here. Comments on its habitat, distribution, phenology, and conservation status are provided, as well as information concerning its morphological relationships with similar congeners. The new species can be...

Davilla pygmaea, a new species endemic to the Brazilian Savanna, is described, illustrated and its systematic position is discussed here. The new species is closely related to D. elliptica and D. grandiflora, from which it differs by characters such as a decumbent habit, the shape of its leaf blades, the inflorescence architecture, the size and num...

A new species of Copaifera from a diversity hotspot in the Brazilian Cerrado is described. Copaifera appendiculata M.J. Silva appears to be endemic of the northern portion of Goiás State, Brazil, and its conservation status is classified as Critically Endangered. It is a dwarf species and can be recognized by a set of characteristics that include:...

The name Ruellia capitata (Acanthaceae) given by Rizzini to the Brazilian species of the genus Ruellia, is an illegitimate name, as it is a later homonym of R. capitata described by D. Don based on specimens from Nepal in Asia. Therefore a new name, Ruellia scarlatina is proposed here for R. capitata. The detail description along with illustration,...

Croton section Adenophylli is the largest section in the genus, with around 223 species distributed in the neotropical region. One of the main diagnostic characteristics of this section is the fruit columella, which has three prominent ascending terminal appendages. During a taxonomic review of this section in Brazil, we observed that C. campestris...

Ruellia umbrosa, a new species from the riparian forest in the lowlands of the Goiás state, is described and illustrated. It is similar to the South American species R. erythropus and R. epallocaulos by the decumbent stems rooting at nodes, solitary flowers in the axils of the upper leaves, and capsules with eight or more seeds, but differs in havi...

The shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiver-sity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxo-nomic impediment to biodiversity research and conservation planning. The taxonomic impedi...

A new species of Chamaecrista was found in the Serra do Espinhaço region in the state of Minas Gerais, Brazil, during an expedition to study the taxonomy of this genus. Chamaecrista sempreviva Fort.-Perez & L.C. Zeferino sp. nov. is herein described, illustrated, and assigned to Chamaecrista sect. Absus. Comments about the ecology, distribution, pr...

We describe Phyllanthus chapadensis, a new phyllocladiferous species of the genus Phyllanthus probable endemic to the Chapada dos Veadeiros region, Goiás, Brazil, in the Cerrado region. This region is located in Central Brazil with a high number of endemic Angiosperms, unique landscapes, and distinct and peculiar phytophysiognomies. The species des...

Euploca decorticans, is here described and illustrated as a new species from a heretofore poorly collected mountain area in Goiás state, Brazil. It is most morphologically similar to E. salicoides, one of the most widely distributed taxa of the genus in Brazil but differs from that species in several features related to habit (height and growth asp...

A new species from the state of Goiás, Brazil, Phyllanthus pterocaulis, is described and illustrated, with comments on its geographic distribution and environmental preferences, phenology, morphological relationships, and systematic position. It is morphologically allied with Phyllanthus avicularis, P. heliotropus, and P. hyssopifolioides, but diff...

Este tratamento é composto pelos seguintes táxons: Phyllanthaceae,. 2020. Phyllanthaceae in Flora do Brasil 2020. Jardim Botânico do Rio de Janeiro. Disponível em: http://floradobrasil.jbrj.gov.br/ reflora/floradobrasil/FB186. DESCRIÇÃO Ervas, subarbustos, arbustos, arvoretas ou árvores-sendo uma espécie aquática (Phyllanthus fluitans), monoicas ou...

Justicia pusilla, a new species of Acanthaceae from Brazil, is described and illustrated. The new species is one of the smallest plants in the genus. It is morphologically allied with Justicia laevilinguis and “Justicia indespecta”, but differs from both by a set of characters related to habit, leaves, spikes, bracts, bracteoles, calyx, corolla and...

Apresentação para 71° Congresso Nacional de Botânica

Phylogenetic, taxonomic, and biogeographic studies of Mimosa sect. Mimosa ser. Mimosa subser. Polycephalae revealed a new species, Mimosa brevicalyx T.P.Mendes & M.J.Silva (sp. nova), endemic to the savannas of central Goiás State, Brazil. The species is described here, illustrated, compared with related taxa (Mimosa hypoglauca var. hypoglauca, M....

Taxonomic studies of Mimosa subser. Polycephalae revealed a new species and indicated the need for taxonomic and nomenclatural adjustments in the group. Mimosa pseudoracemosa is described and illustrated as a new species from Goiás State in central-western Brazil. We discuss its geographic distribution, environmental preferences, phenology and cons...

Chamaecrista with > 330 species, six sections, three subsections and 39 series has had a long and complex taxonomic history. The genus is monophyletic, but most of its traditional infrageneric categories are not. To test the monophyly of sections, subsections and series of Chamaecrista, we used two molecular phylogenetic approaches. The first (Broa...

A synopsis of the genus Cnidoscolus is presented for the midwestern region of Brazil, which resulted from the analysis of about 1,200 specimens from 62 national and foreign herbaria, including type collections. Observations of populations in field were also made. Nine species are recognized, one of which, C. mcvaughii, is new to science. It is desc...

Byrsonima Rich. is one of the largest genera of the Malpighiaceae family with 97 species occurrence in Brazil and multiple potentialities, including pharmaceutical and food industries. In this study, 17 microsatellite markers characterized in Byrsonima cydoniifolia were tested for seven related taxa, all species are native to Brazil and four are en...

Chamaecrista (L.) Moench is one of the largest genera of Leguminosae, with about 330 species, 258 of which are present in Brazil, mainly in Savanna areas in the central portion of the country. The genus is monophyletic and comprises six sections, including Ch. cect. Absus, the biggest one with ca. 180 species divided into four subsections and 31 se...

This work presents a new circumscription and a taxonomic treatment for Chamaecrista ser. Setosae that resulted from previous phylogenetic studies and the analysis of ca. 350 collections, including typus, as well as the observation of populations in field. Nine species were recognized for the series, eight of which are endemic to Brazil, and one fir...

Encyclia comprises 150 species distributed in forest or savanic vegetations of the Americas. The anatomy of their vegetative organs is diversified and useful on taxonomic grounds. We aimed to describe the morphoanatomy of the vegetative system of Encyclia chapadensis L. C. Menezes, E. linearifolioides (Kraenzl.) Hoehne, and E. osmantha (Barb. Rodr....

The urge to organise the world around us is an essential part of human nature. Naming and categorising enable us to store and access information ef ciently. The need to name and categorise extends to the natural world and, in particular, to living organisms. The science underpinning this area of knowledge is called Taxonomy, and is as old as humani...

Byrsonima Rich. is one of the largest genera of the Malpighiaceae family, with 97 species occurrence in Brazil. In this study, 17 microsatellite markers previously developed and characterized in Byrsonima cydoniifolia A. Juss. were tested for seven related taxa. All species tested here are native to Brazil, and of these species four are endemic. Cr...

Six names in Phyllanthus sect. Phyllanthus subsect. Clausseniani are typified (P. amoenus, P. claussenii, P. claussenii var. oblongifolius, P. heteradenius, P. hypoleucus, and P. janeirenis). Phyllanthus atalaiensis is treated as a synonym of P. heteradenius.

Erythroxylum niquelandense is here described, illustrated and compared morphologically with similar congeners. Additionally, its taxonomic position, flowering and fruiting periods, geographical distribution, and conservation assessment are presented, as well as representative images and a distribution map.

During a taxonomic study of Euphorbia from Goiás state, Brazil, we came across some small populations of an unfamiliar species of the genus in the Chapada dos Veadeiros region. After detailed analyses of these specimens we concluded that they correspond to E. burchellii (E. section Anisophyllum), a species hitherto known only from its type locality...

The genus Manihot Mill. contains about 120 species of which about 104 occur in Brazil. We tested the cross-amplification of ten microsatellite markers developed for Manihot esculenta in 15 species of Manihot endemic to the Brazilian Cerrado. We also evaluated the genetic diversity of Manihot irwinii, M. orbicularis, and M. purpureocostata. Ten pair...

Studies on the Orchidaceae family in the Chapada dos Veadeiros National Park revealed a new occurrence for the family to the flora of the Goiás state. Bulbophyllum adiamantinum, hitherto considered endemic to the state of Minas Gerais, is described here, illustrated, commented on its distribution, morphological relationships and period of flowering...

Croton is one of the largest genera of Angiosperms, with a pantropical distribution and a high diversity in South America, where 500 of its species occur. Croton sect. Adenophylli, its largest section, is characterized mainly by the fruit columella with three terminal ascending and inflated appendices and is distributed across the Neotropics, with...

Galeandra Lindl. is a neotropical genus with approximately 18 species distributed from the south of Florida, including Antilles, to the north of Argentina, with Brazil being its center of diversity, with 14 species, of which three are endemic. This study presents the taxonomic treatment of Galeandra species occurring in the Federal District and the...

Epidendrum L. is one of the largest genera of Orchidaceae Juss. with 2.400 neotropical species, 121 of which are present in Brazil, 69 of which are endemic. The taxonomy of Epidendrum species in the Central-West region is scarcely known and linked to floristic studies on Orchidaceae. Taxonomic treatment of Epidendrum species in the Parque Nacional...

Anupdated circumscription and a taxonomic treatment of Chamaecrista sect. Absus subsect. Absus ser. Rigidulae is presented based on the results of previous phylogeny study where the series has emerged as monophyletic with exclusion of two species (C. brachyblepharis and C.ciliolata) and inclusion of two others species (C. botryoides and Ch. sincora...

Two new species, Phyllanthus itamarajuensis and P. tuberculatus (Phyllanthaceae), currently restricted to the Atlantic Forest of Bahia State, Brazil, are described and illustrated. Phyllanthus itamarajuensis is distinguished by having long styles (2–2.2 mm long) associated with subshrubby habit, discretely asymmetrical basal leaves, and anthers wit...

Eriosema comprises c. 150 species and has a pantropical distribution and two centres of diversity, Africa and America. The species occur in tropical savannas and grasslands, including the cerrado in Brazil. They have adapted to these environments by developing specialized underground organs, and an abundance of trichomes. Here we present the first...

(Microlicia D. Don (Microlicieae, Melastomataceae) in the Chapada dos Veadeiros National Park, Goiás State, Brazil). Microlicia D. Don comprises 170 species, of which 150 occur in Brazil, being 149 endemic. The taxonomic knowledge about this genus in the Brazilian Midwest region is insufficient. For this reason, the taxonomic treatment of Microlici...

Chamaecrista is a monophyletic genus, comprises approximately 330 tropical species classified into six sections of which Chamaecrista sect. Absus is the largest of them with 190 species, four subsections, and 31 series. Series Paniculatae comprises seven species (13 taxa) mainly distributed in the Brazilian Savanna and has been pointed as a paraphy...

Analysis of Brazilian collections and foreign herbaria, specially of those from the Midwest region of Brazil for taxonomic studies on Chamaecrista sect. Absus subsect. Absus developed by the authors, resulted in a discover a new species. Chamaecrista barnebyana is here described, illustrated, and commented on its distribution, conservation assessme...

Crop wild relatives (CWR) are a key component of the world’s biota since they have the potential to contribute traits for crop improvement. The rich flora of the Brazilian Cerrado harbours a large number of CWR, but little is known about their distribution and conservation status. This study focused on the conservation of cassava (Manihot) wild rel...

Relevância sistemática da morfologia de frutos dos gêneros americanos da tribo Hippomaneae A. Juss. ex Bartl. (Euphorbiaceae Juss.) Foi realizado um estudo morfológico de frutos e sementes de 12 gêneros Americanos da tribo Hippomaneae, objetivando avaliar a importância taxonômica dessas estruturas. Alguns caracteres são consistentes (deiscência do...

Ongoing taxonomic studies on Manihot in Brazil based on field collections and herbarium consultations led us to describe a new species and to make other taxonomic and nomenclatural changes in the genus. Manihot minimiflora is described and illustrated as a new species from Tocantins state in northern Brazil. Along with M. sagittatopartita and M. ac...

Botanical studies and exploration of Orchidaceae in Chapada dos Veadeiros National Park, Goiás state, Brazil, found a unreported species in the state. The presence of Scaphyglottis livida (Lindl.) Schltr. is reported, an illustration and distribution map are provided, and the morphological relationships of S. livida to other similar species, as wel...

Chamaecrista is one of the largest genera of Leguminosae subfamily Caesalpinioideae and comprises 330 species, of these, 222 species are present in the Phytogeographic Cerrado Domain in Brazil. The taxonomy of the genus in Brazil continues to need study. Here we present a taxonomic synopsis of Chamaecrista for the Chapada dos Veadeiros (CV) region,...

RESUMO Bulbophyllum é um dos maiores gêneros de Angiospermas, com 2.200 espécies em todo o mundo. No Brasil ocorrem 60 espécies, das quais 10 são registradas para o estado de Goiás. Diante da carência de estudos taxonômicos sobre este gênero no Domínio Fitogeográfico do Cerrado (DFC), objetivou-se estudá-lo no Parque Nacional da Chapada dos Veadeir...

The new species Aeschynomene eridesii is here described, illustrated and has its geographical distribution discussed, including flowering and fruiting seasons, morphological relationships, and systematic position, besides assessed according to IUCN criteria. This species is endemic of Brazil and known to the states of Mato Grosso, Pará and Tocantin...

Taxonomic studies in the genus Chamaecrista based on botanical collections from its endemic area, detailed analysis of our own collections and of herbaria, and in specialized literature enabled the discovery of a new species in the State of Tocantins, Brazil. The new species Chamaecrista pauciflora is herein described, illustrated, assigned to Cham...

Croton is the second largest genus of Euphorbiaceae with about 1200 tropical species. Of these, over 715 species are native to the Americas and have been assigned to 31 sections. Croton sect. Geiseleria includes about 80 species distributed from the United States to Argentina; they are especially diverse in Brazil, where about two thirds of its spe...

Studies of Stillingia salpingadenia and S. scutellifera, including type and historical collections, have shown that they are conspecific, sharing the presence of a xylopodium and the same phyllotaxy, foliar pattern, and gland shape in the bracts; S. salpingadenia has priority over S. scutellifera. The species can be recognised by the presence of a...

As a result of a taxonomic and phylogenetic study of Chamaecrista sect. Absus, we identified two new species of Chamaecrista from Brazil and Bolivia, which we designate here as C. oppositifolia and C. longistyla. Morphologically, C. oppositifolia resembles C. sincorana, while C. longistyla is similar to C. paraunana and C. brevicalyx. Description,...

A morfologia palinológica de 24 espécies e duas subespécies de Stillingia foi estudada por microscopia eletrônica de varredura. A análise foi realizada com o objetivo de verificar se a morfologia do pólen pode ser útil na identificação de espécies e categorias infragenéricas nesse grupo. Os grãos de pólen de Stillingia são subprolados ou suboblatos...

Manihot montana, a new species of wild cassava, is described and illustrated based on material from the Brazilian savannas. We compared its macromorphology and leaf anatomy to M. paviifolia, the most morphologically similar species. In addition, we provide images of the new species, details on its distribution, conservation status assessment, pheno...

Chamaecrista oligandra from the Brazilian Cerrado, the most diverse savannah and one of 34 hot spots of the world, is herein described, illustrated, and compared with C. flexuosa var. flexuosa and C. parvistipula, its morphologically similar congeners. The flowering and fruiting, environmental preferences, distribution map, images, and preliminary...

Chamaecrista is a monophyletic genus, but most of its infrageneric categories have been shown to be paraphyletic, including series Rigidulae which currently comprises 30 species, all endemic to Brazil and most occurring in the cerrado vegetation of the central highlands of the country. This molecular phylogenetic study tests the monophyly of C. ser...

Croton macrosepalus Sodré & M.J.Silva (sp. nov.), a new species found in the states of Bahia, Goiás, and Tocantins, in Brazil, is described and illustrated. Although it is morphologically similar to Croton spica, the novel species can be differentiated from it by having large glandular stipules, entire or sometimes serrulate leaf margins, petioles...

The Global Strategy for Plant Conservation (GSPC) was established by the Conference of Parties in 2002 to decrease the loss of plant diversity, reduce poverty and contribute to sustainable development. To achieve this overarching goal, the GSPC has established a series of targets, one of which is to ensure that plant diversity is well understood, s...

Resumo A partir de metodologia usual em taxonomia vegetal é apresentado o tratamento taxonômico das espécies de Aeschynomene presentes do estado de Goiás. Foram registradas 26 espécies correspondentes a 33 táxons, quatro deles endêmicos (A. nana, A. genistoides var. latifoliola, A. simplicifolia e A. veadeirana) e dez novos registros (A. evenia var...

Chaetostoma hexapetalum, a new species from Chapada dos Veadeiros, Goiás state, in the central-western region of Brazil, is described and illustrated. This new species can be easily differentiated from its congeners by the combination of the following characters: the presence of six-merous flowers, a four-locular ovary, fruits with a slight apical...

Considering the importance of extrafloral nectaries (EFNs) in Fabaceae, the objectives of this research were to analyze (1) the anatomical and histochemical characteristics of the EFNs of Chamaecrista ramosa var. ramosa, C. ramosa var. curvifoliola, C. ramosa var. parvifoliola, and C. ramosa var. lucida and (2) the ultrastructure of the EFNs of C....

The published online version contains mistake. The author name Letícia de Almeida Golçalves should be Letícia de Almeida Gonçalves. Corrected name is shown in the author group section above.

Protein tyrosine phosphatase 1B (PTP1B) is an intracellular enzyme responsible for deactivation of the insulin receptor, and consequently acts as a negative regulator of insulin signal transduction. In recent years, PTP1B has become an important target for controlling insulin resistance and type 2 diabetes. In the present study, the ethyl acetate e...

Plants of the genus Phyllanthus, principally Phyllanthus amarus, Phyllanthus urinaria, Phyllanthus niruri, and Phyllanthus tenellus, are used in Brazilian folk medicine to treat kidney stones as well as other ailments, where the latter two species are listed in the Brazilian Pharmacopeia as quebra-pedra (stone-breaker). However, only P. niruri has...

Resumo Sinopse taxonômica do gênero Senna (Leguminosae, Caesalpinioideae, Cassieae) na Região Centro-Oeste do Brasil. A análise de coleções herborizadas, literatura especializada e trabalhos de campo revelaram a ocorrência de 75 táxons correspondentes a 36 espécies, quatro subespécies e 35 variedades para o gênero Senna na Região Centro-Oeste. Os e...

Resumo As Euphorbiaceae da tribo Hippomaneae são complexas e pouco estudadas taxonomicamente em decorrência de possuírem flores diminutas e homogêneas. Com base em coletas mensais desde 2011, análise de coleções de herbários e de literatura específica, foi realizado o tratamento taxonômico de Hippomaneae no Parque Nacional Chapada dos Veadeiros, ár...