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	Provedor de dados Acta Amazonica (1) Biota Neotropica (1) Rev. Bras. Bot. (1) Autor Vicentini,Alberto (3) Boeira,Amanda Shirléia Pinheiro (1) Esteves,Samantha de Miranda (1) Ribeiro,José Eduardo Lahoz da Silva (1) Terra-Araujo,Mário Henrique (1) Webber,Antonio Carlos (1) Mais... Palavra-chave Amazonia (1) Campinarana forests (1) Central Amazonia (1) Characters (1) Ducke Forest Reserve (1) Floral biology (1) Floristic survey (1) Heterostyly (1) Morphology (1) Population ecology (1) Reproductive system variation (1) Species delimitation (1) Taxonomy (1) White-sand forests (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2013 (1) 2012 (2) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Three new species of Sloanea L. (Elaeocarpaceae) from the Central Amazon, Brazil Rev. Bras. Bot. Boeira,Amanda Shirléia Pinheiro; Vicentini,Alberto; Ribeiro,José Eduardo Lahoz da Silva. Three new species of Sloanea L. are recognized based on specimens collected in the Adolpho Ducke Forest Reserve. These new species are morphologically distinct from other Sloanea in the Neotropics in terms of their vegetative and reproductive characters. The Ducke Reserve contains a total of 18 species of Sloanea, and the species closest to these new taxa occur there. Morphological descriptions and illustrations are provided, together with comments concerning morphological similarities with other species, as well as their geographic distributions and their phenologies. Tipo: Info:eu-repo/semantics/article Palavras-chave: Characters; Ducke Forest Reserve; Floristic survey; Morphology; Taxonomy. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000100012 Cryptic species in Pagamea coriacea sensu lato (Rubiaceae): evidence from morphology, ecology and reproductive behavior in a sympatric context Acta Amazonica Esteves,Samantha de Miranda; Vicentini,Alberto. In this study we explore morphological and ecological variation in sympatric populations of Pagamea coriacea s.l. - a species complex from white-sand vegetation in the Amazon. A total of 147 trees were sampled and monitored at three nearby sites in Central Amazon, Brazil. Multivariate analyses of morphology indicated two distinct groups (A and B), which also differed in bark type, each containing subgroups associated with sexual dimorphism. However, a single hermaphroditic individual was observed within group B. As expected, all pistillate plants produced fruits, but 23% of the staminate plants of group B, and 5% of group A also produced fruits. This variation suggests that the sexual systems of both groups are between dioecy and gynodioecy. There was an... Tipo: Info:eu-repo/semantics/article Palavras-chave: Population ecology; Species delimitation; Reproductive system variation; White-sand forests; Amazonia. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672013000400003 Pollination of Pagamea duckei Standl. (Rubiaceae): a functionally dioecious species Biota Neotropica Terra-Araujo,Mário Henrique; Webber,Antonio Carlos; Vicentini,Alberto. The floral biology, pollination and breeding system of Pagamea duckei Standl. (Rubiaceae) were studied at the Reserva Biológica da Campina, Manaus, Amazonas, Brazil. Floral morphology suggested that P. duckei is a distylous species. However, crossing experiments revealed that it is functionally dioecious. The flowers are actinomorphic, yellowish, produce nectar and a sweet odor, which is more intense in the morning. Anthesis started in the morning between 5.00 and 6.00 AM and extended until dusk, when the corolla tube abscissed. The flowers were visited mostly by bees of the genus Melipona. Pagamea duckei is not agamospermic and thus needs pollen vectors for effective pollination. The results of this study strengthen the idea that, in Pagamea, species with... Tipo: Info:eu-repo/semantics/article Palavras-chave: Floral biology; Heterostyly; Campinarana forests; Central Amazonia. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000400010 Registros recuperados: 3 Primeira ... 1 ... Última

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