Joao Stehmann

Joao Stehmann
Federal University of Minas Gerais | UFMG · Departamento de Botânica

About

290
Publications
75,058
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
4,221
Citations

Publications

Publications (290)
Article
Full-text available
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...
Article
Full-text available
The shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impedime...
Article
Full-text available
Nicotiana gandarela Augsten & Stehmann (Solanaceae), sp. nov. , a small ’tobacco’ known only from one locality at Serra do Gandarela, in the state of Minas Gerais, Brazil, is described and illustrated. It is morphologically characterized by its rosulate basal leaves, red corolla with a short tube not inflated at the apex, and the peculiar habitat,...
Article
Full-text available
Premise of the study: Evolutionary studies require solid phylogenetic frameworks, but increased volumes of phylogenomic data have revealed incongruent topologies among gene trees in many organisms both between and within genomes. Some of these incongruences indicate polytomies that may remain impossible to resolve. Here we investigate the degree o...
Article
Full-text available
The shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impedime...
Article
The shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impedime...
Article
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...
Preprint
Full-text available
The shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impedime...
Article
The shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impedime...
Article
A new species of Schwenckia (Solanaceae) from calcareous outcrops of the Serra Azul Biological Reserve in northern Minas Gerais, Brazil, is described and illustrated. Schwenckia aurantiaca is an annual plant characterized by a cylindrical corolla tube with five orange, linear appendages, an androecium with two stamens and three, unequal pilose stam...
Article
Full-text available
Two new species of Athenaea Sendtn. (Solanaceae) from the Brazilian Atlantic Forest are described and illustrated. Athenaea altoserranae I.M.C. Rodrigues & Stehmann, sp. nov. from the Serra do Mar range, in São Paulo State and Athenaea hunzikeriana I.M.C. Rodrigues & Stehmann, sp. nov. from a restricted area in the north-eastern region of Minas Ger...
Article
Ethnopharmacological relevance species of Terminalia (Combretaceae) are used to treat diabetes and metabolic disorders in Asia, Africa, and America. Terminalia phaeocarpa Eichler is an endemic tree from Brazil, popularly known as capitão. This species is closely related to Terminalia argentea Mart., also vulgarly known as capitão, a native but not...
Article
Eugenia section Phyllocalyx, a mainly Brazilian Atlantic Forest group of 16 species, is revised based on a study of over 2000 plant collections. The relationships of Eugenia sect. Phyllocalyx to other sections in Eugenia are discussed. All species are described and comments about geographic distribution and morphology are provided. An identificatio...
Article
The Brazilian Atlantic Forest (BAF) is one of the most impacted biomes in the world, and in this region, there are several examples of the effects of Pleistocene climate changes among the species found there. Athenaea fasciculata (Solanaceae) is a forest component distributed mainly throughout the BAF extension. Here, we investigated the genetic di...
Article
Full-text available
Herbaria represent irreplaceable repositories of biodiversity and are used to answer questions about conservation, ecology, systematics, and other sciences. In this sense, we characterize the infrastructure, human resources, and idiosyncrasies of Brazilian herbaria. To achieve this goal, curators were sent a structured and standardized questionnair...
Article
Full-text available
The Solanum glaucophyllum Desf. has been used to treat and prevent diseases in human and veterinary medicine. On the other hand, plant poisoning causes several bone diseases, among them osteoporosis, which is characterized by osteoblastic hypoplasia. Because the osteoblast is a cell derived from the differentiation of mesenchymal stem cells (MSCs)...
Article
Vriesea is the second largest genus in Tillandsioideae, the most diverse subfamily of Bromeliaceae. Although recent studies focusing on Tillandsioideae have improved the systematics of Vriesea, no consensus has been reached regarding the circumscription of the genus. Here, we present a phylogenetic analysis of core Tillandsioideae using the nuclear...
Article
Full-text available
Background and aims – We revisited Florula Lagoensis, the first floristic list of the Cerrado, published in 1892 by Eugen Warming. All flowering plants were nomenclaturally and taxonomically updated and associated with type material collected by him. We also analysed the contribution of new collections made in Lagoa Santa to assess how many species...
Article
Full-text available
Capsicum carassense Barboza & Bianchetti sp. nov. , a species from mid-elevation of the Atlantic Forest (Minas Gerais, Brazil) is described and illustrated. This endemic new species is distinguished from the most similar C. mirabile Mart. by its moderate to dense general pubescence, narrowly elliptic leaves and larger calyx appendages and corollas....
Article
Full-text available
Solanum hydroides Gouvêa & Giacomin, sp. nov. is described from central Brazilian Atlantic Forest. It is known from only three localities in Espírito Santo and Minas Gerais states, where granitic/gneissic outcrops (inselbergs or sugar loaves) are ubiquitous. The new species, here described, belongs to Solanum subgenus Leptostemonum (or the Leptoste...
Article
Full-text available
Solanum hydroides Gouvêa & Giacomin, sp. nov., is described from central Brazilian Atlantic Forest. It is known from only three localities in Espírito Santo and Minas Gerais states, where granitic/gneissic outcrops (inselbergs or sugar loaves) are ubiquitous. The new species, here described, belongs to Solanum subgenus Leptostemonum (or the Leptost...
Article
Vriesea is the second largest genus in Tillandsioideae, the most diverse subfamily of Bromeliaceae. Although recent studies focusing on Tillandsioideae have improved the systematics of Vriesea, no consensus has been reached regarding the circumscription of the genus. Here, we present a phylogenetic analysis of core Tillandsioideae using the nuclear...
Article
Full-text available
Details of the foraging patterns of solitary bees are much less well known than those of social species, and these patterns are often adjusted to exploit floral resources of one or only a few species. The specialized flower-visiting bees of Petunia are good models for investigating such foraging patterns. Here we analysed the floral biology and pol...
Article
Abstract: Solanum adamantium is described from Serra de Grão Mogol, located in the Espinhaço range, in northern Minas Gerais State, Brazil. The new species is ecologically and morphologically similar to the prickly species S. buddleiifolium and S. thomasiifolium, from which it differs in a series of vegetative and reproductive characters. We discus...
Article
• The tribe Schwenckieae (Solanaceae) is characterised by the presence of appendages on the corolla, a diagnostic trait for the group. These appendages constitute a median distal projection of the three‐lobed petal and occur in the genera Melananthus and Schwenckia but are absent in Heteranthia. • We investigated the micromorphology and anatomical...
Article
Athenaea Sendtn. nom. cons. is re‐established as the correct name for the taxon previously referred to as Aureliana Sendtn. (Withaninae, Solanaceae), which is a later homonym of Aureliana Boehm. (Araliaceae), and thus illegitimate. As a result, five new combinations transferring species from Aureliana Sendtn. to Athenaea are necessary and are made...
Article
We describe and illustrate a new species of Petunia, P. correntina, from southwestern Corrientes, Argentina, in southern South America. The species has funnel-form corolla with whitish-green tube and purple lobes, apex of longer filaments nearly straight, apex of medium filaments curved laterally and opposite each other, connivent anthers, bluish p...
Article
Full-text available
Traditional conservation techniques for mapping highly biodiverse areas assume there to be satisfactory knowledge about the geographic distribution of biodiversity. There are, however, large gaps in biological sampling and hence knowledge shortfalls. This problem is even more pronounced in the tropics. Indeed, the use of only a few taxonomic groups...
Article
Full-text available
Solanum medusae sp. nov. is described from the Cerrado biome in the Serra da Canastra region, southwestern Minas Gerais State, Brazil. Te new species is morphologically similar to the common S. lycocarpum A.St.-Hil. (known as lobeira or wolf-fruit), but differs from it in habit and pubescence characters. We here describe this new taxon and discuss i...
Article
The Solanum asterophorum species group includes four species, all endemic to the Brazilian Atlantic Forest. Species of this group are all prickly shrubs with zigzag branches, paired leaves, reduced leaf-opposed inflorescences, and partially accrescent fruiting calyces. Two species, S. asterophorum and S. pilluliferum, are relatively widespread, whi...
Article
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...
Article
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...
Article
Full-text available
ABSTRACT Initiatives directed at managing information on aquatic plants can support different areas of scientific research, educational practices and political decisions for sustainable management and protection of wetlands and natural resources, as well as reveal knowledge gaps regarding aquatic plants and wetlands. Furthermore, such initiatives c...
Article
Full-text available
Background – Davilla Vand. is a monophyletic genus and member, with other genera endemic to the Neotropics, of the Doliocarpoid clade, a natural lineage of the subfamily Doliocarpoideae J.W.Horn. Its sepals, unequal in size, with two inner ones large and crustaceous and completely covering the fruit, represent a morphological synapomorphy for the g...
Article
Full-text available
Abstract We describe a new species of spiny Solanum (Solanum subg. Leptostemonum), endemic to the Brazilian Atlantic Forest and associated with granitic outcrops (inselbergs or sugar loaf mountains). Solanum kollastrum Gouvêa & Giacomin, sp. nov. is morphologically similar to the poorly known S. sublentum Hiern, but is a heavily armed, much more r...
Article
Full-text available
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...
Article
Two new endangered Brazilian species of Eugenia are described and illustrated, E. magnisepala and E. salacifolia. Eugenia magnisepala, collected in Matas de Cipó (liana forests) in the northeastern state of Bahia, is recognisable by its larger calyx lobes, membranaceous blades and costate ovary, traits not shared with the morphologically similar sp...
Article
Pollination in Solanum (Solanaceae) species is commonly performed by female bees, which vibrate anthers to extract pollen. Another pollen removal type is made by male Euglossine bees milking the anthers when searching for floral scents produced by secretory tissues (osmophorous) at the swollen connective of the anthers of species belonging to Cypho...
Article
Full-text available
A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has been fixed in the paper.
Article
Background – Davilla (Dilleniaceae) currently comprises 28 species and is distributed throughout the Neotropics. Extensive fieldwork conducted in the Atlantic Forest of the Brazilian states Bahia, Espírito Santo, and Rio de Janeiro resulted in the discovery of a new species of Davilla, described and illustrated in this paper. Methods – Herbarium co...
Article
Full-text available
Recent debates on the number of plant species in the vast lowland rain forests of the Amazon have been based largely on model estimates, neglecting published checklists based on verified voucher data. Here we collate taxonomically verified checklists to present a list of seed plant species from lowland Amazon rain forests. Our list comprises 14,003...
Article
Full-text available
Although Brazil is a megadiverse country and thus a conservation priority, no study has yet quantified conservation gaps in the Brazilian protected areas (PAs) using extensive empirical data. Here, we evaluate the degree of biodiversity protection and knowledge within all the Brazilian PAs through a gap analysis of vertebrate, arthropod and angiosp...
Article
Full-text available
Inselbergs are granitic or gneissic rock outcrops, distributed mainly in tropical and subtropical regions. They are considered terrestrial islands because of their strong spatial and ecological isolation, thus harboring a set of distinct plant communities that differ from the surrounding matrix. In Brazil, inselbergs scattered in the Atlantic Fores...
Poster
Full-text available
Inselbergs are granitic and gneissic rock outcrops, which rise abruptly above their surroundings, located in temperate and tropical regions They are considered as terrestrial islands, due to harsh environmental conditions (e g lack of soil and water, high temperatures) their vegetation is clearly distinguished from the surrounding matrix The widesp...
Article
Solanum mellobarretoi, a new species of Solanum subg. Leptostemonum (Solanaceae), is described and illustrated. It is endemic to Brazil and restricted to the southern Espinhaço Range in the State of Minas Gerais, southeastern Brazil. Solanum mellobarretoi is morphologically related to S. leptostachys Dunal, from which it differs by its irregularly...
Article
Full-text available
Two new species of “spiny” Solanum (subgenus Leptostemonum), endemic to the Atlantic Forest of the southeastern region of Brazil, are described. Solanum igniferum and Solanum sessilantherum are morphologically related to Solanum asterophorum. Solanum igniferum inhabits the southern region of Espírito Santo State, and can be primarily distinguished...
Article
Full-text available
Background and Aims Eugenia sect. Phyllocalyx Nied. includes 14 species endemic to the Neotropics, mostly distributed in the Atlantic coastal forests of Brazil. Here the first comprehensive phylogenetic study of this group is presented, and this phylogeny is used as the basis to evaluate the recent infrageneric classification in Eugenia sensu lato...
Article
Full-text available
The knowledge of biodiversity facets such as species composition, distribution and ecological niche is fundamental for the construction of biogeographic hypotheses and conservation strategies. However, the knowledge on these facets is affected by major shortfalls, which are even more pronounced in the tropics. This study aims to evaluate the effect...
Article
Full-text available
o Pão de açúcar, ícone das olimpíadas de 2016, é um dos afl oramentos rochosos mais famosos do mundo. entretanto, além do rio de janeiro, outras regiões do país também abrigam essas formações de composição principalmente granítica e/ou gnáissica, denominadas inselbergs. essas 'ilhas terrestres' inseridas na mata atlântica, bem como em outros biomas...