Flora das cangas da Serra dos Carajás, Pará, Brasil: Droseraceae

Abstract

ResumoDrosera sessilifolia é a única espécie de Droseraceae registrada para as cangas da Serra dos Carajás. Trata-se de uma espécie de ampla distribuição na América do Sul, porém localmente foi encontrada apenas na Serra Sul (S11D). Uma descrição detalhada, fotografias e comentários sobre morfologia e distribuição desta espécie são apresentados aqui. Palavras-chave: Canga, FLONA Carajás, erva carnívora. AbstractDrosera sessilifolia is the only Droseraceae species recorded so far for the cangas of Serra dos Carajás. It is a widely distributed species in South America, however, this species has a locally restricted distribution, being found only in the Serra Sul (S11D). A detailed description, photographs, and comments on morphology and distribution of this species are presented here.

Anatomical studies of Brazilian Amazonian Isoëtes species: inferences on habitat adaptation

“…Pereira et al (2021) verified that I. serracarajensis is an allotetraploid species, which may first explain the genetic and anatomical diversity within this species, despite the proximity of its populations. Although all studied populations of I. serracarajensis inhabit the hydromorphic formations of Serra dos Carajás, sharing similar characteristics of geology and seasonality (Mota et al 2015), intrinsic characteristics of each population may ultimately influence the anatomical diversity within this species. The depth of the water column and the area occupied by each water body directly determine the period in which water will remain in their habitats and prevent early plant exposure to high temperatures and evaporative demands, winds, and intense radiation.…”