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Development of carpels and ovules in Dialypetalanthus fuscescens Kuhlm. (Rubiaceae): an enigmatic taxon Acta Botanica
Figueiredo,Rogério da Costa; Vieira,Ricardo Cardoso; Mariath,Jorge Ernesto de Araújo; Moço,Maria Cecilia de Chiara; Toni,Karen L. G. De.
ABSTRACT Dialypetalanthus is a monospecific genus that occurs in the Amazon Basin of Brazil, Bolivia and Peru and occupies a controversial position among the Rubiaceae. We continue this taxonomic discussion with the overall aim of clarifying the systematic position of D. fuscescens within the Rubiaceae. To accomplish this, we analyzed the ontogeny of its gynoecium, in particular the floral meristem, as well as the development of the carpels and cauline placentation. Gynosporogenesis and the differentiation of the carpellary septa and ovules were also described. Dialypetalanthus fuscescens was classified according to evolutionary diagrams found in the literature. The following characteristics were observed in D. fuscescens: 1) permanence of the floral...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carpel development carpellary septum cauline placentation floral meristem; Ovule.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000100128
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Fruits of neotropical species of the tribe Malveae (Malvoideae - Malvaceae): macro- and micromorphology Acta Botanica
Masullo,Fernanda de Araújo; Siqueira,Sanny Ferreia Hadibe; Barros,Claudia Franca; Bovini,Massimo G.; Toni,Karen L. G. De.
ABSTRACT Fruit morphology of the tribe Malveae has been discussed since the first taxonomic classifications of Malvaceae. The fruits are schizocarps, with some genera possessing an endoglossum. Besides morphological variation in the endoglossum, other differences include the number seeds per locule and ornamentation of the exocarp. An in-depth study of the fruit morphology of Malveae is essential to gain insight into the relationships among taxa of the tribe. Therefore, the present study aimed to describe the fruit morphology of Malveae, including micromorphology, variation in endoglossum structure and arrangement of seeds in the locule, to comprehensively evaluate the systematic relationships among its contained taxa. The results indicate morphological...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endoglossum; Mericarps; Pericarp; Schizocarp; Seeds.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000200301
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