Taxonomic revision of all the Neosymplocos Brand and palinological considerations of the Brazilian species Barberina (Vell.) A.DC. (Symplocos Jacq., Symplocaceae) / Revisão taxonomica da seção Neosymplocos Brand e considerações palinologicas das especies brasileiras da seção Barberina (Vell.) A.DC. (Symplocos Jacq., Symplocaceae)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

A taxonomic revision of Symplocos section Neosymplocos Brand (Symploca, presented. This section, nearly endemic to Brazil (southem and southeastem regions), cc 12 species, most of which dwell in highland Mata Atlântica and three in "campo rupestl study was based on field observation, dried and a1cohol-preserved specimens, and phot( images. In addition, a pollen study of the morphologically androdioecious species of Sy, subgenus Epigenia (Vell.) Brand section Barberina (Vell.) A.DC. was performed. Materi obtained from dried specimens and the field. They were treated with gold and analyz scanning electronic microscopy. In ali samples studied except one, the pollen fi morphologically hermaphrodite individuaIs was deformed and apparently lack cy1 whereas the pollen from morphologically mal e specimens was well formed and c( cytoplasm. From this it is conc1uded that populations of section Barberina are func dioecious. The specimen with functional hermaphrodite pollen belongs to Symplocos from Distrito Federal. More intensive sampling of populations in this species would further insight into the possibility of functional androdioecy in Symplocos

ASSUNTO(S)

taxonomia vegetal symplocaceae symplocos classification palynology palinologia plants neosymplocos

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