Inês Cordeiro

• Senior Researcher at Instituto de Botânica

Myrsine umbellata, a native Brazilian tree, was investigated for its chemical composition and bioactivity. A total of 44 compounds were identified, including resorcinol derivatives, sesquiterpenes, and embelin. The ethyl acetate leaf fraction exhibited the highest phenolic and flavonoid content, with superior antioxidant activity (IC50 = 8.87–17.33...

The demand for less hazardous and environmentally friendly surface disinfectants is growing and essential oils may be efficient alternatives. Vapor phase assay is a promising technique which explore the volatility of essential oils for determining the antimicrobial activity. In this study, we modified the conditions of the inverted Petri dish techn...

We describe a new phyllocladiferous species of Phyllanthus, which is endemic to the Minas Gerais state, Brazil, and is found within the Serra Nova State Park. This new species has cylindrical phylloclades, like those of P. choretroides, another endemic species in Minas Gerais, and P. goianensis and P. chapadensis, both exclusive to the state of Goi...

As part of the systematic study of the tribes Ditaxeae and Adelieae (Acalyphoideae-Euphorbiaceae), here we compile and present a taxonomic synopsis for the South American taxa of Argythamnia, Chiropetalum, and Philyra. We recognize 22 species for Argythamnia, including one herein described as a new species, 20 species and one variety for Chiropetal...

Croton palustris (≡ Caperonia palustris) and Croton castaneifolius (≡ Caperonia castaneifolia) were published by Linnaeus in the first edition of Species plantarum. Both names remain untypified at present. While syntypes are extant for C. palustris there is no known original material for C. castaneifolius. Here, a lectotype is selected for C. palus...

O Parque Estadual Mata das Flores (PEMF) é uma Unidade de Conservação de Proteção Integral situada no município de Castelo, ao sul do estado do Espírito Santo, entre as coordenadas 20°35'54"S e 41°10'53"W. Ele foi criado em outubro de 1992 pela Lei Estadual nº 4.617. O Parque ocupa uma área de aproximadamente 800 hectares com altitudes que variam e...

Phyllanthaceae é uma família restabelecida desde o APG II, sendo que, tradicionalmente, o maior gênero que a compõe é Phyllanthus. Todavia, a família passou por diversas alterações taxonômicas e filogenéticas nos últimos anos que alteraram a sua circunscrição infragenérica, tendo, atualmente, duas abordagens: uma que considera Phyllanthus como o ma...

The largest continuous patch of Seasonally Dry Tropical Forests (SDTF) is the Caatinga Biome in north-eastern Brazil, which has the greatest biodiversity and highest degree of endemism compared to any other SDTF patch of South America. Our aim was to conduct a phylogeographic study with Euphorbia phosphorea to understand the evolutionary history of...

Apresentamos aqui o tratamento taxonômico da tribo Jatropheae (Euphorbiaceae) na Bahia como contribuição ao conhecimento da flora do estado. Foram reconhecidos dois gêneros: Joannesia, com apenas uma espécie (J. princeps) e Jatropha, com 12 espécies: J. calcarea, J. curcas, J. elliptica, J. gossypiifolia, J. hastifolia, J. longibracteata, J. martiu...

The latest phylogenetic and taxonomic studies emphasizing Phyllanthus (Phyllanthaceae) have significantly altered the relationships between its taxa. In this work, we inferred a phylogeny for the Brazilian phyllocladiferous species of Phyllanthus, traditionally included within Phyllanthus sects. Choretropsis and Xylophylla from eastern Brazil and C...

Argythamnia (Euphorbiaceae) comprises approximately 70 species and is widely distributed in the New World, mainly restricted to seasonal environments. It is represented by seven species in the biogeographic provinces of the Chaco and Pampa, which are characterized by vegetation mosaics of grasslands and forests. Some species are poorly known, with...

O gênero Brasiliocroton (Euphorbiaceae) possui duas espécies, B. mamoninha e B. muricatus, ambas ocorrem no estado da Bahia. O tratamento inclui chave de identificação, descrições e comentários sobre distribuição geográfica, habitat e fenologia.

The latest phylogenetic and taxonomic studies emphasizing Phyllanthus (Phyllanthaceae) have significantly altered the relationships between its taxa. In this work, we inferred a phylogeny for the phyllocladiferous species of Phyllanthus , traditionally included within Phyllanthus sects. Choretropsis and Xylophylla from eastern Brazil and Caribbean,...

Jatropha Linnaeus (1753: 1006) belongs to subfamily Crotonoideae (Euphorbiaceae) and has ca. 180 species distributed in tropical and subtropical regions of the world (Dehgan 2012; Webster 2014). The genus is found throughout the Neotropical region, with Mexico (50 spp.) and Brazil (23 spp.) as its centers of diversity (Christensen et al. 2019).

Simple Summary This study represents the most comprehensive phylogenetic reconstruction of the plant subtribe Ditaxinae and related taxa within Acalyphoideae (Euphorbiaceae). The taxonomy of this group, mainly based in morphology, has long been controversial. Here, we present a new taxonomic classification at the genus and tribe ranks using a solid...

A critical taxonomic and nomenclatural review of the Brazilian species of Acalypha (Euphorbiaceae, Acalyphoideae) is presented. As a result, 40 species (44 taxa including six subspecies) are accepted, 37 of them native (17 endemic) and three introduced; also, 132 names are considered synonyms, 28 of them for the first time. Two new combinations are...

After discovering an unknown Euphorbiaceae with an unusual combination of morphological characters, molecular phylogenetic analyses were conducted to evaluate the phylogenetic position of the plant. Results of the analyses support the recognition of a resolved lineage sister to a clade comprising Caryodendron, which is sister to the Adenophaedra +...

Stem succulence evolved independently in many plant lineages as an adaptation to arid environments. One of the most interesting cases is the convergence between Cactaceae and Euphorbia, which have anatomical adaptations mostly to increase photosynthetic capability and water storage. Our goal was to describe the shoot development in two succulent sp...

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...

Caperonia (Ditaxinae, Euphorbiaceae) has ca. 34 species distributed in the Americas and Africa, with approximately 26 of them occurring in South America. The species are exclusively of open marshy environments. The new species Caperonia amarumayu and C. maracaibensis, from Bolivia and Venezuela respectively, are hereby described. We also designate...

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...

Croton bacupariensis, an endemic species from the coastal plain of the State of Rio Grande do Sul, southern Brazil, is described and illustrated. The new species shares morphological features with Croton gnaphalii, but differs mainly by the habit, indumentum of leaves and morphology of pistillate flowers. In addition; C. gnaphalii occurs all over t...

A new species of Phyllanthus with phylloclades endemic to the State of Bahia is described here. Phyllanthus dracaenoides can be recognized for its peculiar habit that resembles a species of Dracaena, a very unusual height of up to 7 m, the plagiotropic phylloclades spirally arranged, and its vermiform cincinni. Notes on its habitat, taxonomic affin...

Este tratamento é composto pelos seguintes táxons: Chiropetalum, Chiropetalum anisotrichum, Chiropetalum foliosum, Chiropetalum intermedium, Chiropetalum molle, Chiropetalum phalacradenium, Chiropetalum ramboi, Chiropetalum tricoccum.

Este tratamento é composto pelos seguintes táxons: Euphorbiaceae, Acalypha, Actinostemon, Adelia, Adenophaedra, Alchornea, Alchorneopsis, Aleurites, Algernonia, Angostylis, Anomalocalyx, Aparisthmium, Astraea, Astrococcus, Bernardia, Bia, Brasiliocroton, Caperonia, Caryodendron, Chiropetalum, Cleidion, Cnidoscolus, Codiaeum, Colliguaja, Conceveiba,...

Pollen grains of 23 species distributed in 15 genera and represented by 64 specimens were analysed using light and scanning electron microscopy to characterise the neotropical genera of Hippomaneae. Five of these species are palynologically characterised for the first time. Hippomaneae pollen is shed in monads, being small to large, isopolar, oblat...

Bernardia erecta, B. monoica, and B. stylosa (Euphorbiaceae-Acalyphoideae), from Bahia Coastal Forests in Brazil, are described, illustrated, and compared to morphologically similar taxa. We also provide information about the distribution, habitat, and conservation status of the new species.

During a taxonomic revision of the genus Croton from the Pampas grasslands, some necessary taxonomic adjustments were identified and are here presented. The study was based on new collections, field work and analyses of protologues and type specimens. We treat C. allemii as a synonym of C. triqueter, C. stenotrichus as a synonym of C. hilarii, and...

We describe and illustrate three new species of Euphorbia subgenus Chamaesyce from Brazil: E. blepharadena O.L.M.Silva & Cordeiro sp. nov., E. longipedunculata O.L.M.Silva & Riina sp. nov. and E. sobolifera O.L.M.Silva & P.J.Braun sp. nov. Based on morphological characteristics, E. blepharadena sp. nov. and E. longipedunculata sp. nov. are placed i...

Seasonally Dry Tropical Forests (SDTFs) are found scattered throughout the Neotropics, from northwestern Mexico to northern Argentina, and southwestern and eastern Brazil, with eastern Brazil having the largest and most isolated fragment of SDTF, known as Caatinga. Growing knowledge from dated phylogenies and ancestral reconstruction studies sugges...

Foliar epicuticular waxes of specimens of 13 Croton species native in Brazil were extracted. The fractions containing alkanes and primary alcohols were isolated by preparative thin layer chromatography. Derivatized n-primary alcohols were identified by gas chromatography (GC) coupled with mass spectrometry and n-alkanes by GC and comparison with kn...

Ditaxis is a Neotropical genus with approximately 50 species, most of them in seasonally dry tropical forests of Brazil, Central America and the Antilles. The Brazilian Caatinga, the largest area of SDTF in South America, harbors three endemic species of Ditaxis, including the new Ditaxis grazielae, hereby described and illustrated. The new species...

We described a new species of Phyllanthus currently known from a single fragment of Ombrophilous Dense Forest in the Jequitinhonha Valley, Minas Gerais State, Brazil. Phyllanthus pedicellatus is the second species of the genus with phylloclades found in the Atlantic Forest domain, once mostly Brazilian Phyllanthus with these kinds of specialized br...

This work presents the taxonomic treatment of the genus Astraea in Bahia. The state, along with Minas Gerais, has the highest diversity of Astraea, with seven species recognized: A. digitata, A. gracilis, A. klotzschii, A. paulina, A. praetervisa, A. subcomosa and A. surinamensis. The treatment includes an identification key, descriptions, photogra...

Astraea is a genus with 13 species, widely distributed throughout Neotropics and especially diverse in Brazil. The genus is currently placed in Crotoneae as sister to Acidocroton. This work aimed to characterize the pollen of Astraea as a contribution to the taxonomy and to understand the evolution of pollen traits between Astraea and Acidocroton....

Astraea is a genus of tribe Crotoneae (Euphorbiaceae: Crotonoideae) widely distributed in the Neotropical region. Its highest diversity is found in eastern Brazil, and a few weedy species were most likely introduced and naturalized in the Paleotropics. Species of Astraea may be recognized by the usually deeply lobed leaves, lacking basilaminar or a...

A new species, Euphorbia adenoplicata, is here described and illustrated. The species was found in the vicinity of Serra Geral do Tocantins, close to the border of the states of Tocantins and Bahia, within the Cerrado biome, where it grows in cerrado rupestre (rocky savannah vegetation). Euphorbia adenoplicata is placed in Euphorbia sect. Crossaden...

We investigated species relationships in Astraea, a primarily Neotropical genus of tribe Crotoneae centered in Brazil, using data from the nuclear ribosomal ITS, and the plastid trnL-trnF and psbA-trnH spacers. With all species of Astraea sampled along with representatives from across Crotoneae, the evolutionary history of Astraea was interpreted i...

Analysis of the leaf and stem essential oils from three Brazilian Lauraceae species showed that the major constituent of O. odorifera was safrole (57.1 and 88.5% for leaves and stems, respectively) while for O. indecora leaves the major ones were the α-pinene (12.8%) and β-pinene (12.4%) andβ-bisabolol (12.2%) in the stems. For the third species, P...

A new species of Bernardia with stellate trichomes from the Brazilian Cerrado is described and illustrated. Bernardia allemii is most similar to B. gardneri, but differs by its multi-stemmed, subshrub habit, broader leaf blades, tomentose old branches, staminate bracteoles that are usually reniform to flabellate, and larger sepals and bracts in the...

In Euphorbiaceae tribe Hippomaneae is the pantropical genus Microstachys, comprised by 24 species, mostly from Brazil. Palynological studies with several representatives of the genus are scarce. The purpose of this study was to describe the pollen morphology of Microstachys and find possible differentiating characteristics between its species. Ten...

Hura crepitans L. stands out in the family Euphorbiaceae by being bat-pollinated, having inflorescences with a single female flower with a giant multicarpellate gynoecium at the base of a spike with a large number of male flowers. We described the structure and development of flowers of this species to understand the diversification of flowers in t...

Most Euphorbiaceae are insect pollinated, but in Acalyphoideae a considerable number of species are wind pollinated and generally have inconspicuous monochlamydeous flowers with red styles and multifid or laciniate stigmata. Alchornea is within the basal alchorneoid clade, and its flowers are more conspicuous in the group. The aim of this study was...

Astraea lobata is the most complex species within Astraea due to its wide distribution range and lack of clear diagnostic characters in its current delimitation. Based on an extensive revision of herbarium specimens and field observations, we recognize three more entities, including two new combinations, apart from A. lobata s.s.: A. surinamensis a...

A new combination in Sagotia, Sagotia heterocalyx, based on Sandwithia heterocalyx is herein proposed once this taxon shares more similarities with Sagotia (such as flowers without nectaries, the pistillate ones with calyx lobes united only near the base and thick styles, and staminate flowers with sessile to subsessile stamens) than with Sandwithi...

Euphorbiaceae is one of the richest families in the State of São Paulo, with 37 genera and around 150 species. A synopsis of Astraea was published as part of the treatment for the tribe Crotoneae, but recent taxonomic and systematic advances have brought a more refined knowledge about the genus, especially for the widespread Astraea lobata. This sp...

Eugenia dysenterica DC is a native species from the Cerrado biome and can be found in several states of Brazil. This study evaluated the chemical composition, antimicrobial and antioxidant activities from the essential oils of a population collected in São Paulo state. Essential oils were obtained by conventional means, and their compositions were...

A new species of Euphorbia sect. Brasilienses V.W. Steinm. & Dorsey is described. Euphorbia tetrangularis Hurbath & Cordeiro is endemic to the Serra de Montevidéu, a part of the Espinhaço Range located in the state of Minas Gerais, Brazil. It differs from other species within the section based on the following characters: 4-ribbed branches, green c...

Pseudanthia are reduced and compact inflorescences which apparently had independent evolution in Euphorbiaceae and Peraceae within Malpighiales. In order to analyze the hypothesis that the different pseudanthia found in Malpighiales have non-homologous developmental steps, we studied the inflorescence and flower development in the three Malpighiale...

Cerrado vegetation is the main formation covering c.60% of the land surface of Maranhão, Brazil, with cerradão being the dominant physiognomy. To characterise the cerrado flora in Maranhão, 12 localities were selected across its distribution in the northeastern, central, southern and southeastern regions of the state. A total of 150 angiosperm spec...

An updated checklist of the families Euphorbiaceae s.str., Phyllanthaceae and Peraceae from the state of Mato Grosso do Sul is presented based on data from Lista das Espécies do Brasil, collections of several herbaria and floras and revisions available. For each taxon is cited a voucher specimen from MS, its area of occurrence (Cerrado, Chaco, Pant...

Twenty-nine species of Euphorbia (Euphorbiaceae) from the state of Bahia are recognized here. Key for identification, descriptions, illustrations, and comments about the taxa, as well as distribution maps of the species in the state, are presented.

Phytoplasmas infestations are widely documented in angiosperms, especially in ornamental species (Chaturverdi et al. 2010). Infestations by these phloem-limited plant pathogenic bacteria may induce several symptoms such as loss of floral meristem determinacy and abnormal flower development, including virescence of floral organs and phyllody, i.e.,...

Resumo Phyllanthus, com cerca de 1.270 espécies, é pantropical, mas também ocorre em regiões temperadas de todo o planeta. No Brasil são registradas cerca de 100 espécies, que ocorrem em florestas, cerrados, campos e nas caatingas. O objetivo do presente trabalho foi estudar a taxonomia das espécies do gênero ocorrentes no estado do Espírito Santo....

Leaf from two Guatteria elliptica R. E. Fries (Annonaceae) specimens were collected at Paranapiacaba and Caraguatatuba in São Paulo (Brazil). The essential oils presented (GC/GC-MS), as major compound, spathulenol (53.9%) for the Paranapiacaba specimen and caryophyllene oxide (40.9%) for Caraguatatuba. The oils showed low antioxidant activity with...

The Euphorbiaceae are notable for floral diversity and evolutionary complexity. Croton is the second largest genus in the family and exhibits particular diversity in its flowers. The aim of this study was to investigate the floral ontogeny and structure of three Croton species with distinct morphologies, with a focus on testing the hypothesis that...

Within Astraea Klotzsch (1841: 194), Astraea lobata (Linnaeus 1753: 1005) Klotzsch (1841: 194) may be considered the most taxonomically complex species due to its wide geographical distribution and the several varieties that have been proposed for this species by Müller Argoviensis (1866, 1874). In his concept, Müller Argoviensis (1866) united unde...

This work describes and illustrates Bernardia hamadryadica, from the Chapada Diamantina, in northeastern Brazil. The new species is distinguished from the other species of the genus by the combination of the following characters: shrubby habit; young leaves and inflorescences usually produced on short shoots; membranaceous leaf laminas less than 6...

Background: Hedyosmum brasiliense Mart. Ex Miq. (Chloranthaceae) is a dioecious shrub popularly used to treat foot fungi and rheumatism. This work investigated the chemical composition, antifungal and antioxidant activities of flowers and leaves from H. brasiliense essential oils. Methods: H. brasiliense male and female flowers and leaves were coll...

Background: Avicennia schaueriana Stapf & Leechm. ex Moldenke (Acanthaceae) is a native species from the Brazilian mangroves presenting ecological and economic significance. This study compared the composition and the biological activities from the essential oils obtained from two A. schaueriana populations collected at Jureia-Itatins and Ilha do...

Several types of non-glandular trichomes have been reported in tribe Crotoneae, especially in the genus Croton L.. The current classification of Croton trichomes, proposed by G. L. Webster et al. in 1996, was based on a reduced taxon sampling and for this reason it does not cover all existing types. In addition, overlapping descriptive parameters h...

This contribution presents updates to the knowledge of the species of Euphorbia that occur in Santa Catarina state, southern Brazil. More specifically, we here typify the names E. cyathophora, E. hirtella, E. paranensis and E. stenophylla, and present the first records of E. cyathophora, E. graminea, E. ophthalmica and E. thymifolia for Santa Catar...

Pscheidt, A.C., H.-J. Esser & I. Cordeiro (2017). A new species of Microstachys (Euphorbiaceae, Hippomaneae) in Paraguay. Candollea 72: 27–30. In English, English and Spanish abstracts. A new species, Microstachys dasycarpa Pscheidt, Esser & Cordeiro (Euphorbiaceae, Hippomaneae), endemic to Paraguayan Chaco, is described and illustrated. The genus...

Synopsis of the genus Acalypha L. (Euphorbiaceae) in the State of São Paulo, Brazil). Euphorbiaceae is one of the largest families of angiosperms, with 246 genera and approximately 6300 species distributed worldwide. Acalypha is the third largest genus of this family, including about 450 species and with a pantropical distribution. This work was ba...

Premise of research. Phyllanthus is a pantropical genus and the largest in Phyllanthaceae with a wide diversity of habits and floral morphologies. The flowers are considered monochlamydeous, but some divergences are found in the literature. The aim of this study was to investigate the floral structure of Phyllanthus urinaria based on ontogenetic, s...

Since the early days of medicine, chemical substances derived from animals, plants, and microorganisms have been used for treatment of various diseases. Among these, products derived from plants have dominated the pharmacopoeias for thousands of years, providing an inexhaustible source of medicinal resources. Croton L. is the second largest genus o...

Background: Serious infections are a major cause of morbidity and mortality in systemic inflammatory rheumatic disease (SIRD) patients. Although vaccination may prevent numerous infections, vaccination uptake rates are low in this group of patients. Objectives: To develop evidence-based recommendations for vaccination in SIRD patients. Methods: We...

Microstachys crassifolia, a new species from Chapada dos Veadeiros region in the State of Goias, central Brazil, is here described and illustrated. Its habit and general morphology resembles that of M. nana Silva & Esser, an endemic species from the State of Paraná, southern Brazil. Both species are hemicryptophytes from grasslands, with a well-dev...

Flower protection and attraction of pollinators are mainly associated with the secretory structures. The flower-pollinator relationship corroborates these functions and is an essential link in the interpretation of different floral morphologies, such as the pseudanthia occurring in Euphorbiaceae and Peraceae, two sister families in Malpighiales wit...

In this installment of our series on Brazilian Euphorbia we focus on Euphorbia section Crossadenia, which includes a few semisucculent pencil-stemmed species. This section belongs to Euphorbia subgenus Chamaesyce, a subgenus with an extraordinary diversity of life forms and great variation in cyathium morphology, comprising more than 550 species wo...

A new species of Euphorbia sect. Alectoroctonum from Brazil is described and illustrated. Euphorbia sarcoceras belongs to the "Dichlium" group, and is compared to Euphorbia estevesii, E. jablonskii, E. insulana, and E. sciadophila, the other species of E. sect. Alectoroctonum that also occur in Brazil. The new species occurs in seashore plains vege...

An updated inventory of Brazilian seed plants is presented and offers important insights into the country’s biodiversity. This work started in 2010, with the publication of the Plants and Fungi Catalogue, and has been updated since by more than 430 specialists working online. Brazil is home to 32,086 native Angiosperms and 23 native Gymnosperms, sh...

An updated inventory of Brazilian seed plants is presented and offers important insights into the country’s biodiversity. This work started in 2010, with the publication of the Plants and Fungi Catalogue, and has been updated since by more than 430 specialists working online. Brazil is home to 32,086 native Angiosperms and 23 native Gymnosperms, sh...

Euphorbia L., with around 2000 species, is the biggest genus of Euphorbiaceae and one of the largest and most diverse genera within Angiosperms. It shows an almost cosmopolitan distribution and notable morphological diversity and is characterized by a pseudanthial inflorescence, the cyathium, which is unique to the genus. Along with its great morph...

• Phylogenetic and morphological studies have helped clarify the systematics of large and complex groups such as the tribe Crotoneae (Euphorbiaceae). However, very little is known about the diversity, structure, and function of anatomical features in this tribe. Crotoneae comprises the species-rich pantropical genus Croton and six small neotropical...

Essential oil (EO) vapours have been used for their antimicrobial properties since ancient times. In the literature, this activity is commonly tested in the liquid phase, although currently the vapour phase activity has gained interest. Hesperozygis myrtoides (St.Hil. ex Benth.) Epling is a small aromatic bush that is used for treating respiratory...