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Acta Botanica Brasilica

Print version ISSN 0102-3306

Abstract

GRACANO, Deusângela; PRADO, Jefferson  and  AZEVEDO, Aristéa Alves. Pteridophyta preliminary survey at Rio Doce State Park, MG, Brazil. Acta Bot. Bras. [online]. 1998, vol.12, n.2, pp.165-181. ISSN 0102-3306.  http://dx.doi.org/10.1590/S0102-33061998000200006.

A Pteridophyta preliminary survey was carried out at Rio Doce State Park, being identified 15 families, 27 genera, and 57 species. The following families were found: Aspleniaceae, Blechnaceae, Dennstaedtiaceae, Dryopteridaceae, Gleicheniaceae, Hymenophyllaceae, Lomariopsidaceae, Osmundaceae, Polypodiaceae, Pteridaceae, Schizaeaceae, Selaginellaceae, Tectariaceae, Thelypteridaceae, and Woodsiaceae. Among them, the most representatives were Pteridaceae, with 29.8% of the collected species, distributed in four genera (Adiantum, Hemionitis, Pityrogramma, and Pteris) and Thelypteridaceae with 17.5% of the species included into two genera (Macrothelypteris and Thelypteris). The remaining families ranged from 1.8 to 8.8% of the species. Out of 57 registered species in the Park. 22 showed a restricted distribution; on the other hand Pteridaceae and Thelypteridaceae were the ones with a broader occurrence. Physical and chemical soil analysis of the Park's paths presented acid pH (4.3-5.1), variable clay proportion and médium to low P, Ca, Al and Mg content.

Keywords : Pteridophyta; Rio Doce State Park (MG); pteridophytic flora.

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