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José Floriano Barêa Pastore - One of the best experts on this subject based on the ideXlab platform.
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polygala veadeiroensis Polygalaceae a new species of polygala endemic to chapada dos veadeiros goias brazil
Kew Bulletin, 2018Co-Authors: José Floriano Barêa PastoreAbstract:Summary. A new species, Polygala veadeiroensis (Polygalaceae) subgenus Polygala section Timutua DC. series Timoutoideae, is described from Chapada dos Veadeiros, Goias State, Brazil. The infrageneric placement and its conservation status are assessed and its habitat and phenology are included. The new species is compared with its morphologically allied species, P. carphoides and P. cuspidata. Illustrations, photos of floral parts under magnification, and a distribution map are also provided.
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two new species of bredemeyera Polygalaceae from brazil
Phytotaxa, 2018Co-Authors: Michelle Mota, José Floriano Barêa PastoreAbstract:Two new species of Bredemeyera (Polygalaceae) for Brazil are described and illustrated. Bredemeyera atlantica occurs in Atlantic Forest in the Brazilian states of Espirito Santo and Rio de Janeiro, whereas B. petiolata occurs in Cerrado savanna vegetation along the Sao Francisco river in the Northeast, in the state of Bahia and Piaui. Photographic plates of the habit and comparative floral morphology with allied species, as well as a distribution map, are provided.
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polygala minarum Polygalaceae a new species endemic to southern minas gerais brazil
Kew Bulletin, 2016Co-Authors: José Floriano Barêa PastoreAbstract:A new species, Polygala minarum (Polygalaceae) subgenus Polygala series Nudicaules, is described from Lavras, Serra de Carrancas and Sao Sebastiao do Paraiso in the south of Minas Gerais State, Brazil. The infrageneric placement and its conservation status are assessed and its habitat and phenology are discussed. The new species is compared with its morphologically allied species, P. fontellana, P. poaya, and P. nudicaulis. Illustrations, photographs, and a distribution map are also provided.
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flora das cangas da serra dos carajas para brasil Polygalaceae
Rodriguésia, 2016Co-Authors: José Floriano Barêa Pastore, Joao Barros Da SilveiraAbstract:Apresenta-se um estudo floristico das especies de Polygalaceae ocorrentes nas cangas da Serra dos Carajas (Para). Sao apresentadas descricoes, chaves taxonomicas, ilustracoes e comentarios taxonomicos dos taxons. Neste estudo foram encontradas seis especies distribuidas em quatro generos: Bredemeyera divaricata, B. floribunda, Caamembeca spectabilis, Polygala adenophora, Securidaca diversifolia e S. rivinifolia, nenhuma delas endemica da regiao ou do estado do Para.
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HERBÁRIO DE CURITIBANOS, SANTA CATARINA (CTBS)
Unisanta BioScience, 2015Co-Authors: José Floriano Barêa PastoreAbstract:Resumo : O Herbario de Curitibanos (CTBS) foi fundado recentemente em 2013, e inclui recentes coletas da regiao de Curitibanos e entorno da flora da Floresta Atlântica subtropical. Atualmente o CTBS possui uma colecao de 1.200 especimes, sendo tres familias Polygalaceae, Lamiaceae e Leguminosae as tres mais representativas em numero de especimes depositados. Embora nao tenha tipos nomenclaturais depositados, algumas especies de Polygalaceae estao sendo descritas a partir de especimes mantidos no CTBS. Abstract : The Curitibanos herbarium (CTBS) was recently created (2013) and includes mainly collection from the Curitibanos region and subtropical Atlantic Forest. The herbarium CTBS comprises about 1,200 specimens, mostly of them from the families: Polygalaceae, Lamiaceae and Leguminosae. Although, CTBS doesn’t keep nomenclatural type yet, some species of Polygalacea e are being describe based on specimens kept in CTBS. Palavras-chave : exsicatas, colecao biologica, Curitibanos, Polygalaceae.
Fe Lix Forest - One of the best experts on this subject based on the ideXlab platform.
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Interfamilial relationships in order Fabales: new insights from the nuclear regions sqd1 and 26S rDNA
Plant Systematics and Evolution, 2020Co-Authors: Deniz Aygoren Uluer, Julie A Hawkins, Fe Lix ForestAbstract:Leguminosae, Polygalaceae, Quillajaceae and Surianaceae together comprise the order Fabales. Phylogenetic relationships within Fabales remain an unsolved problem even though interfamilial relationships have been examined in a number of studies using different sampling approaches and both molecular and morphological data. In this study, we gather information from the nuclear 26S rDNA region as well as previously published data from the sqd 1 , mat K and rbc L regions. Phylogenetic analyses were performed by maximum parsimony, maximum likelihood and Bayesian inference. Overall, the best-supported topology for the relationships among families within the order places the pair of Leguminosae and Polygalaceae as sister to the pair of Quillajaceae and Surianaceae. However, our approximately unbiased (AU) test of the combined data results has shown that none of the seven different topologies rejected. Furthermore, three topologies were not significantly different from each other. Therefore, similar to the previous studies, this study did not find well-supported dichotomous relationships among the four Fabales families. The Fabales topology was very sensitive to both data choice and the phylogenetic methods used, which may indicate a rapid-near-simultaneous evolution of the four Fabales families. Our results also show that while nuclear sqd 1 can be helpful as a complementary region, both the nuclear sqd 1 and rDNA 26S regions could be problematic when analyzed individually.
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supermatrix analyses and molecular clock rooting of fabales exploring the effects of outgroup choice and long branch attraction on topology
Botany, 2020Co-Authors: Deniz Aygoren Uluer, Fe Lix Forest, Julie A HawkinsAbstract:Fabales is a cosmopolitan angiosperm order that consists of four families: Leguminosae (Fabaceae), Polygalaceae, Surianaceae, and Quillajaceae. Despite the great interest in this group, a convincin...
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Elusive relationships within order Fabales: phylogenetic analyses using matK and rbcL sequence data.
Systematic Botany, 2009Co-Authors: María Angélica Bello, Fe Lix Forest, Anne Bruneau, Julie A HawkinsAbstract:Abstract The order Fabales, including Leguminosae, Polygalaceae, Quillajaceae and Surianaceae, represents a novel hypothesis emerging from angiosperm molecular phylogenies. Despite good support for the order, molecular studies to date have suggested contradictory poorly supported interfamilial relationships. Our reappraisal of relationships within Fabales addresses past taxon sampling deficiencies, and employs parsimony and Bayesian approaches using sequences from the plastid regions rbcL (166 spp.) and matK (78 spp.). Five alternative hypotheses for interfamilial relationships within Fabales were recovered. The Shimodaira-Hasegawa test found the likelihood of a resolved topology significantly higher than the one calculated for a polytomy but did not favour any of the alternative hypotheses of relationship within Fabales. In the light of the morphological evidence available and the comparative behavior of rbcL and matK, the topology recovering Polygalaceae as sister to the rest of the order Fabales with L...
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pollen morphology of the family Polygalaceae fabales
Botanical Journal of the Linnean Society, 2008Co-Authors: Hannah Banks, Fe Lix Forest, Bente B Klitgaard, Frances Claxton, Peter R CraneAbstract:An overview of pollen morphology from all genera in the family Polygalaceae is presented to assist systematic studies of the Fabales clade. The pollen of 72 species, representing 18 genera, in Polygalaceae was examined using light microscopy and scanning electron microscopy. In addition, the pollen of eight species, representing seven genera, was examined using transmission electron microscopy. Pollen is described and illustrated for each genus, and the first pollen descriptions and publication of photomicrographs are presented for seven genera: Balgoya, Barnhartia, Comesperma, Diclidanthera, Eriandra, Moutabea, plus Polygala subgenus Badiera, and species previously included in Nylandtia (now in Muraltia). Pollen morphological similarities and differences broadly correspond with relationships suggested by recent molecular phylogenies. The aperture number was also found to correlate with trees generated using molecular data; early branching taxa have lower aperture numbers than later branching ones. The overall range of ectoaperture numbers seen in Polygalaceae, excluding Balgoya, is between five and 33. The pollen of Balgoya is tricolporate; all other genera have pollen with a range of ectoaperture numbers within each sample. The degree of endoaperture fusion to form endocingula is variable at a subgeneric level. All pollen is isopolar, except for that of Heterosamara and Polygala wattersii. © 2008 The Linnean Society of London, Botanical Journal of the Linnean Society, 2008, 156, 253–289.
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the role of biotic and abiotic factors in evolution of ant dispersal in the milkwort family Polygalaceae
Evolution, 2007Co-Authors: Fe Lix Forest, Peter R Crane, Claes Persson, Mark W Chase, Julie A HawkinsAbstract:A phylogenetic approach was taken to investigate the evolutionary history of seed appendages in the plant family Polygalaceae (Fabales) and determine which factors might be associated with evolution of elaiosomes through comparisons to abiotic (climate) and biotic (ant species number and abundance) timelines. Molecular datasets from three plastid regions representing 160 species were used to reconstruct a phylogenetic tree of the order Fabales, focusing on Polygalaceae. Bayesian dating methods were used to estimate the age of the appearance of ant-dispersed elaiosomes in Polygalaceae, shown by likelihood optimizations to have a single origin in the family. Topology-based tests indicated a diversification rate shift associated with appearance of caruncular elaiosomes. We show that evolution of the caruncular elaiosome type currently associated with ant dispersal occurred 54.0-50.5 million year ago. This is long after an estimated increase in ant lineages in the Late Cretaceous based on molecular studies, but broadly concomitant with increasing global temperatures culminating in the Late Paleocene-Early Eocene thermal maxima. These results suggest that although most major ant clades were present when elaiosomes appeared, the environmental significance of elaiosomes may have been an important factor in success of elaiosome-bearing lineages. Ecological abundance of ants is perhaps more important than lineage numbers in determining significance of ant dispersal. Thus, our observation that elaiosomes predate increased ecological abundance of ants inferred from amber deposits could be indicative of an initial abiotic environmental function.
Julie A Hawkins - One of the best experts on this subject based on the ideXlab platform.
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Interfamilial relationships in order Fabales: new insights from the nuclear regions sqd1 and 26S rDNA
Plant Systematics and Evolution, 2020Co-Authors: Deniz Aygoren Uluer, Julie A Hawkins, Fe Lix ForestAbstract:Leguminosae, Polygalaceae, Quillajaceae and Surianaceae together comprise the order Fabales. Phylogenetic relationships within Fabales remain an unsolved problem even though interfamilial relationships have been examined in a number of studies using different sampling approaches and both molecular and morphological data. In this study, we gather information from the nuclear 26S rDNA region as well as previously published data from the sqd 1 , mat K and rbc L regions. Phylogenetic analyses were performed by maximum parsimony, maximum likelihood and Bayesian inference. Overall, the best-supported topology for the relationships among families within the order places the pair of Leguminosae and Polygalaceae as sister to the pair of Quillajaceae and Surianaceae. However, our approximately unbiased (AU) test of the combined data results has shown that none of the seven different topologies rejected. Furthermore, three topologies were not significantly different from each other. Therefore, similar to the previous studies, this study did not find well-supported dichotomous relationships among the four Fabales families. The Fabales topology was very sensitive to both data choice and the phylogenetic methods used, which may indicate a rapid-near-simultaneous evolution of the four Fabales families. Our results also show that while nuclear sqd 1 can be helpful as a complementary region, both the nuclear sqd 1 and rDNA 26S regions could be problematic when analyzed individually.
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supermatrix analyses and molecular clock rooting of fabales exploring the effects of outgroup choice and long branch attraction on topology
Botany, 2020Co-Authors: Deniz Aygoren Uluer, Fe Lix Forest, Julie A HawkinsAbstract:Fabales is a cosmopolitan angiosperm order that consists of four families: Leguminosae (Fabaceae), Polygalaceae, Surianaceae, and Quillajaceae. Despite the great interest in this group, a convincin...
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Combined phylogenetic analyses reveal interfamilial relationships and patterns of floral evolution in the eudicot order Fabales
Cladistics, 2012Co-Authors: M. Angélica Bello, Paula J Rudall, Julie A HawkinsAbstract:Relationships between the four families placed in the angiosperm order Fabales (Leguminosae, Polygalaceae, Quillajaceae, Surianaceae) were hitherto poorly resolved. We combine published molecular data for the chloroplast regions matK and rbcL with 66 morphological characters surveyed for 73 ingroup and two outgroup species, and use Parsimony and Bayesian approaches to explore matrices with different missing data. All combined analyses using Parsimony recovered the topology Polygalaceae (Leguminosae (Quillajaceae + Surianaceae)). Bayesian analyses with matched morphological and molecular sampling recover the same topology, but analyses based on other data recover a different Bayesian topology: ((Polygalaceae + Leguminosae) (Quillajaceae + Surianaceae)). We explore the evolution of floral characters in the context of the more consistent topology: Polygalaceae (Leguminosae (Quillajaceae + Surianaceae)). This reveals synapomorphies for (Leguminosae (Quillajaceae + Surianaceae)) as the presence of free filaments and marginal ⁄ ventral placentation, for (Quillajaceae + Surianaceae) as pentamery and apocarpy, and for Leguminosae the presence of an abaxial median sepal and unicarpellate gynoecium. An octamerous androecium is synapomorphic for Polygalaceae. The development of papilionate flowers, and the evolutionary context in which these phenotypes appeared in Leguminosae and Polygalaceae, shows that the morphologies are convergent rather than synapomorphic within Fabales.
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Elusive relationships within order Fabales: phylogenetic analyses using matK and rbcL sequence data.
Systematic Botany, 2009Co-Authors: María Angélica Bello, Fe Lix Forest, Anne Bruneau, Julie A HawkinsAbstract:Abstract The order Fabales, including Leguminosae, Polygalaceae, Quillajaceae and Surianaceae, represents a novel hypothesis emerging from angiosperm molecular phylogenies. Despite good support for the order, molecular studies to date have suggested contradictory poorly supported interfamilial relationships. Our reappraisal of relationships within Fabales addresses past taxon sampling deficiencies, and employs parsimony and Bayesian approaches using sequences from the plastid regions rbcL (166 spp.) and matK (78 spp.). Five alternative hypotheses for interfamilial relationships within Fabales were recovered. The Shimodaira-Hasegawa test found the likelihood of a resolved topology significantly higher than the one calculated for a polytomy but did not favour any of the alternative hypotheses of relationship within Fabales. In the light of the morphological evidence available and the comparative behavior of rbcL and matK, the topology recovering Polygalaceae as sister to the rest of the order Fabales with L...
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the role of biotic and abiotic factors in evolution of ant dispersal in the milkwort family Polygalaceae
Evolution, 2007Co-Authors: Fe Lix Forest, Peter R Crane, Claes Persson, Mark W Chase, Julie A HawkinsAbstract:A phylogenetic approach was taken to investigate the evolutionary history of seed appendages in the plant family Polygalaceae (Fabales) and determine which factors might be associated with evolution of elaiosomes through comparisons to abiotic (climate) and biotic (ant species number and abundance) timelines. Molecular datasets from three plastid regions representing 160 species were used to reconstruct a phylogenetic tree of the order Fabales, focusing on Polygalaceae. Bayesian dating methods were used to estimate the age of the appearance of ant-dispersed elaiosomes in Polygalaceae, shown by likelihood optimizations to have a single origin in the family. Topology-based tests indicated a diversification rate shift associated with appearance of caruncular elaiosomes. We show that evolution of the caruncular elaiosome type currently associated with ant dispersal occurred 54.0-50.5 million year ago. This is long after an estimated increase in ant lineages in the Late Cretaceous based on molecular studies, but broadly concomitant with increasing global temperatures culminating in the Late Paleocene-Early Eocene thermal maxima. These results suggest that although most major ant clades were present when elaiosomes appeared, the environmental significance of elaiosomes may have been an important factor in success of elaiosome-bearing lineages. Ecological abundance of ants is perhaps more important than lineage numbers in determining significance of ant dispersal. Thus, our observation that elaiosomes predate increased ecological abundance of ants inferred from amber deposits could be indicative of an initial abiotic environmental function.
Silvia Teresinha Sfoggia Miotto - One of the best experts on this subject based on the ideXlab platform.
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o genero polygala l Polygalaceae na regiao sul do brasil
Hoehnea, 2013Co-Authors: Raquel Ludtke, Tatiana T Souzachies, Silvia Teresinha Sfoggia MiottoAbstract:In Southern Brazil, the Polygalaceae family is represented by five genera: Acanthocladus, Bredemeyera, Monnina, Polygala, and Securidaca. The genus Polygala is the largest of the Polygalaceae family, with approximately 725 species widely distributed in the world, in all types of environment. Approximately 140 taxa of Polygala are known in the Brazilian flora. The survey recorded 39 species of Polygala to Southern Brazil, representing the subgenera Hebeclada, Ligustrina and Polygala, the last one with 31 species. Full descriptions, illustrations, analytical keys, data on habitat, geographic distribution, and ecological observations are provided.
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characterizing polygala l Polygalaceae species in southern brazil using issr
Plant Molecular Biology Reporter, 2010Co-Authors: Raquel Ludtke, Silvia Teresinha Sfoggia Miotto, Gustavo Agostini, Tatiana T SouzachiesAbstract:The genus Polygala is one of the seven Polygalaceae genera that occur in the Brazilian flora, covering approximately 110 species. During the taxonomic review of Polygalaceae in Southern Brazil, difficulties were found when classifying species with very similar morphology, and morphological data alone could not clarify these interspecific relationships. In this context, inter-simple sequence repeat (ISSR) molecular markers were used in an attempt to characterize the genetic diversity and relationships among Polygala species. Nine Polygala species were analyzed using six selected ISSR primers that generated a total of 75 bands (100% polymorphic). The relationships were evaluated by dendrograms using the unweighted pair group method using arithmetic averages algorithm. The use of ISSR to solve the taxonomic problems was very useful for the Brazilian Polygala species. This is the first report of a molecular characterization of the Brazilian Polygala species to successfully group the different species. The ISSR results are in agreement with the morphological evidence of a new Polygala species from Southern Brazil.
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Polygala altomontana ( Polygalaceae ), a new species from southern Brazil
Kew Bulletin, 2008Co-Authors: Raquel Ludtke, Ilsi Iob Boldrini, Silvia Teresinha Sfoggia MiottoAbstract:Polygala is the largest genus in the family Polygalaceae, with about 110 species and 30 varieties. Polygala altomontana is a new species described from southern Brazil and is placed in the subgenus Polygala characterised by flowers with a crested keel. P. altomontana occurs in the high grasslands in Parana and Santa Catarina states and has a prostate habit, leaves opposite, rarely alternate, fleshy and glandular, white flowers, persistent corolla and narrowly winged fruits with a persistent style and stigma. This species was recognised during a revision of the Polygalaceae for southern Brazil. A description, illustrations and observations on habitat and geographic distribution are presented.
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bredemeyera willd e securidaca l Polygalaceae na regiao sul do brasil
Revista Brasileira de Biociências, 2008Co-Authors: Raquel Ludtke, Tatiana T Souzachies, Silvia Teresinha Sfoggia MiottoAbstract:RESUMO: (Bredemeyera Willd. e Securidaca L. (Polygalaceae) na Regiao Sul do Brasil). Na Regiao Sul do Brasil a familia Polygalaceae esta representada por quatro generos: Bredemeyera Willd., Monnina Ruiz & Pav., Polygala L. e Securidaca L. O presente estudo trata de uma revisao taxonomica de Bredemeyera e Securidaca para a Regiao Sul do Brasil. Para tanto realizouse uma revisao bibliografica e de herbarios bem como expedicoes de coleta nos Estados do Parana, Santa Catarina e Rio Grande do Sul. Bredemeyera se distribui nas Americas Central e do Sul e nas Indias Ocidentais, sendo representado no Brasil por cerca de 14 especies. O genero Securidaca e predominantemente neotropical e possui 24 especies confirmadas para a flora brasileira. Na Regiao Sul do Brasil, Bredemeyera esta representado apenas por Bredemeyera floribunda Willd., uma liana que tem como limite sul o Estado do Parana. Tambem constituido por trepadeiras lenhosas ou lianas, o genero Securidaca esta representado por tres especies na Regiao Sul: Securidaca lanceolata A. St.-Hil. & Moq., S. macrocarpa A. W. Benn. e S. rivinaefolia A. St.-Hil. & Moq. Dos taxons confirmados, a unica especie que ocorre nos tres Estados da Regiao Sul e Securidaca lanceolata, restrita a Mata Atlântica, enquanto que S. rivinaefolia ocorre apenas na divisa do Parana com Mato Grosso do Sul. O trabalho consta de chave para identificacao dos generos e especies, descricoes, ilustracoes, distribuicao geografica, habitat e comentarios adicionais. Palavras-chave: Bredemeyera, Securidaca, Polygalaceae, taxonomia, Regiao Sul.
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Polygala riograndensis (Polygalaceae), a New Species from Southern Brazil
Novon, 2007Co-Authors: Raquel Ludtke, Silvia Teresinha Sfoggia MiottoAbstract:Polygala riograndensis Ludtke & Miotto (Polygalaceae) is a new species from the Brazilian flora. This species is included in the subgenus Polygala L., which has the largest number of species in the Brazilian territory. Polygala riograndensis is closely related to P. campestris Gardner, but it is set apart mainly by the stems sinuate, capsules winged, leaves petiolate and glabrous, and by the crest of the keel with 6 to 7 lobes that are simple or bifid. This species was recognized during the revision of the genus Polygala in Rio Grande do Sul state. Morphological description, illustration, and observations about habitat and distribution are presented.
Raquel Ludtke - One of the best experts on this subject based on the ideXlab platform.
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o genero polygala l Polygalaceae na regiao sul do brasil
Hoehnea, 2013Co-Authors: Raquel Ludtke, Tatiana T Souzachies, Silvia Teresinha Sfoggia MiottoAbstract:In Southern Brazil, the Polygalaceae family is represented by five genera: Acanthocladus, Bredemeyera, Monnina, Polygala, and Securidaca. The genus Polygala is the largest of the Polygalaceae family, with approximately 725 species widely distributed in the world, in all types of environment. Approximately 140 taxa of Polygala are known in the Brazilian flora. The survey recorded 39 species of Polygala to Southern Brazil, representing the subgenera Hebeclada, Ligustrina and Polygala, the last one with 31 species. Full descriptions, illustrations, analytical keys, data on habitat, geographic distribution, and ecological observations are provided.
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characterizing polygala l Polygalaceae species in southern brazil using issr
Plant Molecular Biology Reporter, 2010Co-Authors: Raquel Ludtke, Silvia Teresinha Sfoggia Miotto, Gustavo Agostini, Tatiana T SouzachiesAbstract:The genus Polygala is one of the seven Polygalaceae genera that occur in the Brazilian flora, covering approximately 110 species. During the taxonomic review of Polygalaceae in Southern Brazil, difficulties were found when classifying species with very similar morphology, and morphological data alone could not clarify these interspecific relationships. In this context, inter-simple sequence repeat (ISSR) molecular markers were used in an attempt to characterize the genetic diversity and relationships among Polygala species. Nine Polygala species were analyzed using six selected ISSR primers that generated a total of 75 bands (100% polymorphic). The relationships were evaluated by dendrograms using the unweighted pair group method using arithmetic averages algorithm. The use of ISSR to solve the taxonomic problems was very useful for the Brazilian Polygala species. This is the first report of a molecular characterization of the Brazilian Polygala species to successfully group the different species. The ISSR results are in agreement with the morphological evidence of a new Polygala species from Southern Brazil.
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Polygala altomontana ( Polygalaceae ), a new species from southern Brazil
Kew Bulletin, 2008Co-Authors: Raquel Ludtke, Ilsi Iob Boldrini, Silvia Teresinha Sfoggia MiottoAbstract:Polygala is the largest genus in the family Polygalaceae, with about 110 species and 30 varieties. Polygala altomontana is a new species described from southern Brazil and is placed in the subgenus Polygala characterised by flowers with a crested keel. P. altomontana occurs in the high grasslands in Parana and Santa Catarina states and has a prostate habit, leaves opposite, rarely alternate, fleshy and glandular, white flowers, persistent corolla and narrowly winged fruits with a persistent style and stigma. This species was recognised during a revision of the Polygalaceae for southern Brazil. A description, illustrations and observations on habitat and geographic distribution are presented.
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bredemeyera willd e securidaca l Polygalaceae na regiao sul do brasil
Revista Brasileira de Biociências, 2008Co-Authors: Raquel Ludtke, Tatiana T Souzachies, Silvia Teresinha Sfoggia MiottoAbstract:RESUMO: (Bredemeyera Willd. e Securidaca L. (Polygalaceae) na Regiao Sul do Brasil). Na Regiao Sul do Brasil a familia Polygalaceae esta representada por quatro generos: Bredemeyera Willd., Monnina Ruiz & Pav., Polygala L. e Securidaca L. O presente estudo trata de uma revisao taxonomica de Bredemeyera e Securidaca para a Regiao Sul do Brasil. Para tanto realizouse uma revisao bibliografica e de herbarios bem como expedicoes de coleta nos Estados do Parana, Santa Catarina e Rio Grande do Sul. Bredemeyera se distribui nas Americas Central e do Sul e nas Indias Ocidentais, sendo representado no Brasil por cerca de 14 especies. O genero Securidaca e predominantemente neotropical e possui 24 especies confirmadas para a flora brasileira. Na Regiao Sul do Brasil, Bredemeyera esta representado apenas por Bredemeyera floribunda Willd., uma liana que tem como limite sul o Estado do Parana. Tambem constituido por trepadeiras lenhosas ou lianas, o genero Securidaca esta representado por tres especies na Regiao Sul: Securidaca lanceolata A. St.-Hil. & Moq., S. macrocarpa A. W. Benn. e S. rivinaefolia A. St.-Hil. & Moq. Dos taxons confirmados, a unica especie que ocorre nos tres Estados da Regiao Sul e Securidaca lanceolata, restrita a Mata Atlântica, enquanto que S. rivinaefolia ocorre apenas na divisa do Parana com Mato Grosso do Sul. O trabalho consta de chave para identificacao dos generos e especies, descricoes, ilustracoes, distribuicao geografica, habitat e comentarios adicionais. Palavras-chave: Bredemeyera, Securidaca, Polygalaceae, taxonomia, Regiao Sul.
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Polygala riograndensis (Polygalaceae), a New Species from Southern Brazil
Novon, 2007Co-Authors: Raquel Ludtke, Silvia Teresinha Sfoggia MiottoAbstract:Polygala riograndensis Ludtke & Miotto (Polygalaceae) is a new species from the Brazilian flora. This species is included in the subgenus Polygala L., which has the largest number of species in the Brazilian territory. Polygala riograndensis is closely related to P. campestris Gardner, but it is set apart mainly by the stems sinuate, capsules winged, leaves petiolate and glabrous, and by the crest of the keel with 6 to 7 lobes that are simple or bifid. This species was recognized during the revision of the genus Polygala in Rio Grande do Sul state. Morphological description, illustration, and observations about habitat and distribution are presented.
