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Aquatic ferns from Viçosa (MG, Brazil): Salviniales (Filicopsida; Tracheophyta)

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Abstract

This work presents the species of Salviniales occurring in the region of Viçosa, MG, Brazil. There, two species occur naturally (Azolla microphylla Kaulf. and Salvinia auriculata Aubl.), three spontaneously (Marsilea ancylopoda A. Braun, S. minima Baker, and S. molesta D.S. Mitch.), and one in cultivation (S. biloba Raddi). Both S. auriculata and S. molesta form dense mats, covering the whole lake areas; S. biloba also forms mats throughout its native distribution. We confirmed the alloploidy (pentaploidy) of S. molesta, due to the production of only hollow sporangia; we speculate aneuploidy for other taxa from Viçosa. We also confirmed the presence of nitrogen-fixing cyanobacterium, Anabaena azollae Strasburger (Nostocaceae), within the fronds of A. microphylla. We provide keys, descriptions, illustrations, taxonomic comments, and updated distribution data for all six taxa. We also propose new characteristics with taxonomic value and new morphological terminology for Salvinia.

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Acknowledgments

The authors thank Programa de Pós-Graduação em Botânica (Universidade Federal de Viçosa) for partly bearing the costs of this work; Reinaldo Pinto for the illustrations; the handling Editor and the two anonymous reviewers for their constructive suggestions on the manuscript; and the following people for their help in the field and general support: Simone Ferreira da Silva, Tatiane Campos, Laura S. Rabelo, Lucas R. Lopes, Fernanda L. Gotti, Andreza Gonçalves da Silva, Eduardo Guatimosim, Robert W. Barreto, and Cristiana T. J. Lucas.

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  1. Programa de Pós-Graduação em Botânica, Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Av. P.H. Rolfs s.n., Viçosa, MG, CEP 36570-900, Brazil

    Cecília Vieira Miranda & Pedro Bond Schwartsburd

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  1. Cecília Vieira Miranda
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  2. Pedro Bond Schwartsburd
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Correspondence to Pedro Bond Schwartsburd.

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Miranda, C.V., Schwartsburd, P.B. Aquatic ferns from Viçosa (MG, Brazil): Salviniales (Filicopsida; Tracheophyta). Braz. J. Bot 39, 935–942 (2016). https://doi.org/10.1007/s40415-016-0284-9

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  • DOI: https://doi.org/10.1007/s40415-016-0284-9

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