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Diversity of ferns and lycophytes in Brazil

This compilation of ferns and lycophytes in Brazil is an update of the one published in 2010 and shows that the richest phytogeographic domain continues to be in the Atlantic Rainforest which also has the largest number of endemic and threatened species.
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Evaluation of water quality at the source of streams of the Sinos River Basin, southern Brazil.

Different water quality indices (WQI) used for the sub-basins of three important streams in the Sinos River Basin showed a worrying scenario in which water quality has already been negatively affected at the sites where three important sub- Basin begin to form.
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Integrated Environmental Assessment of streams in the Sinos River basin in the state of Rio Grande do Sul, Brazil.

The integrated diagnosis of water quality in these streams is fundamentally important to ensure the sustainable management of water resources and their multiple uses, as well to estimate their contribution to pollution in this river basin.
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Chemical analysis, antioxidant, antichemotactic and monoamine oxidase inhibition effects of some pteridophytes from Brazil

The hypothesis was considered that phenolics and triterpenes are responsible for these pronounced activities of ferns from Brazil.
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The genus Thelypteris (Thelypteridaceae, Polypodiopsida) in the state of Mato Grosso, Brazil - II - subgenera Amauropelta (Kunze) A.R. Sm., Cyclosorus (Link) C.V. Morton and Steiropteris (C. Chr.) K.…

The genus Thelypteris, represented in this study by the subgenera Amauropelta (Kunze) A.R. Sm.
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Effects of nickel on the fern Regnellidium diphyllum Lindm. (Marsileaceae).

The introduction of pollutants with Ni in the natural habitat of Regnellidium diphyllum may inhibit the establishment of plants in the initial stage of development, a problem to be considered in relation to the conservation of this species.
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Germination and sporophytic development of Regnellidium diphyllum Lindman (Marsileaceae) in the presence of hexavalent chromium.

Considering the pollution from Cr(VI) in some areas of R. diphyllum natural occurrence, these data indicate that low reproductive rates and disappearance of populations are likely to occur in these situations.
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Elaphoglossum montanum, a New Species from Southern Brazil

A new fern species of the Atlantic Forest in southern Brazil that belongs to the Elaphoglossum “Subulate scales clade” and occurs in the upper montane forest regions in the States of Rio Grande do Sul and Santa Catarina.
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