Sobre la identidad de Spermacoce polygonifolia ySpermacoce perijaensis(Spermacoceae-Rubiaceae)

ResumenDos nuevas combinaciones en especies de la tribu Spermacoceaepara Sudamérica son aquí presentadas: Spermacoce polygonifoliase transfiere al género Mitracarpus y S. perijaensis a Tobagoa. Se elige lectotipo paraTobagoa maleolensy neotipo para Diodia ottonis

Two new species of Borreria (Spermacoceae, Rubiaceae) from the states of Goiás and Minas Gerais, Brazil

Two new species of Borreria from Goiás and Minas Gerais are described and illustrated. Borreria minensis was found in “campos rupestres” formation, between 1100 and 1600 m elevation, and is endemic to Minas Gerais, while Borreria psyllocarpoides was found in the “cerrado” vegetation, at the border of Goiás and Minas Gerais. Electron microphotographs of the seeds and pollen grains, and a distribution map of the two new species are also provided.Fil: Miguel, Laila Mabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); ArgentinaFil: Souza, Elnatan B.. Universidade Estadual Vale do Acaraú; BrasilFil: Cabral, Elsa L.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentin

Sobre la identidad de Spermacoce polygonifolia ySpermacoce perijaensis(Spermacoceae-Rubiaceae)

ResumenDos nuevas combinaciones en especies de la tribu Spermacoceaepara Sudamérica son aquí presentadas: Spermacoce polygonifoliase transfiere al género Mitracarpus y S. perijaensis a Tobagoa. Se elige lectotipo paraTobagoa maleolensy neotipo para Diodia ottonis

Óleos essenciais das folhas de Vernonia Remotiflora e Vernonia Brasiliana: composição química e atividade biológica Volatile leaf oils of Vernonia Brasiliana and Vernonia Remotiflora: chemical composition and biological activity

The chemical composition of the essential oils, obtained by hidrodistillation, from leaves of two Vernonia species (V. remotiflora and V. brasiliana), was determined by GC-FID and GC-MS. Both essential oils were predominantly constituted by sesquiterpenes (92.0 - 93.4%). The main constituents of the oil from V. brasilana were (E)-caryophyllene (36.7%), germacrene D (35.5%), and α-humulene (11.7%), while (E)-caryophyllene (42.2%) and bicyclogermacrene (20.0%) were the major ones in the oil from V. remotiflora. Although with moderate activity both oils showed acetylcholinesterase and antibacterial activities

Growing knowledge: an overview of Seed Plant diversity in Brazil

Abstract 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, showing an increase of 3% in its species richness in relation to 2010. The Amazon Rainforest is the richest Brazilian biome for Gymnosperms, while the Atlantic Rainforest is the richest one for Angiosperms. There was a considerable increment in the number of species and endemism rates for biomes, except for the Amazon that showed a decrease of 2.5% of recorded endemics. However, well over half of Brazillian seed plant species (57.4%) is endemic to this territory. The proportion of life-forms varies among different biomes: trees are more expressive in the Amazon and Atlantic Rainforest biomes while herbs predominate in the Pampa, and lianas are more expressive in the Amazon, Atlantic Rainforest, and Pantanal. This compilation serves not only to quantify Brazilian biodiversity, but also to highlight areas where there information is lacking and to provide a framework for the challenge faced in conserving Brazil's unique and diverse flora