Data/hora: 11/06/2024 01:04:01

Provedor de dados: | 36
País: | Brazil
Título: | A new combination in Peristethium (Loranthaceae) expands the genus' range into the Amazon-Cerrado ecotone
Autores: | Caires,Claudenir Simões; Gomes-Bezerra,Kadja Milena; Proença,Carolyn Elinore Barnes.
Data: | 2014-06-01
Ano: | 2014
Palavras-chave: | Brazil; Floral dimorphism; Leaf architecture; Struthanthus.
Resumo: | The genus Peristethium, characterized by determinate inflorescences protected by deciduous bracts, occurs in the northwest of South America, as well as Costa Rica and Panama. The main objective of this paper was to transfer one species to what we believe is its correct generic placement in Peristethium, that likewise implies in a shift of the genus' distribution beyond the Amazon. A new combination, Peristethium reticulatum, is proposed, based on Struthanthus reticulatus, described from Tocantins in 1980. The sexual dimorphism of the inflorescences of P. reticulatum (sessile male flowers and pedicellate female flowers) associated with male inflorescences that are inserted at leafless nodes are unique within the genus. The male flowers have dimorphic stamens, well-developed anthers and a pistiloid, whilst female flowers have robust styles and stigmas, and much reduced staminodes. Peristethium reticulatum and P. polystachyum occurs in the Amazon regions of Brazil, with the former recorded also in the ecotone with the Central Brazilian savannas (Cerrados).
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000200002
Editor: | Instituto Nacional de Pesquisas da Amazônia
Relação: | 10.1590/S0044-59672014000200002
Formato: | text/html
Fonte: | Acta Amazonica  v.44 n.2 2014
Fonte: | info:eu-repo/semantics/openAccess