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      Floristic survey of herbaceous and subshrubby aquatic and palustrine angiosperms of Viruá National Park, Roraima, Brazil

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          Abstract

          Abstract

          We provide and discuss a floristic survey of herbaceous and subshrubby aquatic and palustrine angiosperms of Viruá National Park (VNP). The VNP is located in the northern Amazon basin and displays phytophysiognomies distributed in a mosaic where these plants occur, as flooded forests, hydromorphic white-sand savannas, “ buritizais” and waterbodies. After expeditions between February/2010 and January/2015 and the analysis of specimens from regional herbaria, we list 207 species of herbaceous and subshrubby aquatic and palustrine angiosperms for the VNP, distributed in 85 genera in 37 families. We recorded six new occurrences for Brazil, two for the northern Brazilian region and 21 for Roraima state. These new occurrences, added to the other species listed here, highlight the floristic similarity between the study site and the Guiana Shield, an adjacent phytogeographical unit and geologically related to the origin of white-sand savannas.

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          (Lista Florística de angiospermas herbáceas e subarbustivas aquáticas e palustres do Parque Nacional do Viruá, Roraima, Brasil) Esse estudo foi realizado objetivando a elaboração de uma lista florística das angiospermas herbáceas e subarbustivas aquáticas e palustres do Parque Nacional do Viruá (PNV). O PNV está localizado na região norte da Bacia Amazônica e apresenta fitofisionomias distribuídas em mosaico onde esse grupo de plantas ocorre, como florestas inundáveis, savanas sobre solos de areia branca hidromórficas, buritizais e corpos d’água. Após coletas entre Fevereiro/2010 e Janeiro/2015 e a análise de espécimes depositados em herbários regionais, foram listadas 207 espécies de angiospermas herbáceas e subarbustivas aquáticas e palustres no PNV, distribuídas em 85 gêneros e 37 famílias. Foram registradas seis novas ocorrências para o Brasil, duas para a região norte do Brasil e 21 para o estado de Roraima. Essas novas ocorrências, juntamente com as demais espécies listadas, evidenciam a similaridade florística entre a área de estudo e o Escudo das Guianas, uma unidade fitogeográfica adjacente e geologicamente relacionada com a origem das savanas sobre solos de areia branca.

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          Tropical Blackwater Rivers, Animals, and Mast Fruiting by the Dipterocarpaceae

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            A Classification of Major Naturally-Occurring Amazonian Lowland Wetlands

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              Why are most aquatic plants widely distributed? Dispersal, clonal growth and small-scale heterogeneity in a stressful environment

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                Author and article information

                Journal
                PhytoKeys
                PhytoKeys
                PhytoKeys
                PhytoKeys
                Pensoft Publishers
                1314-2011
                1314-2003
                2016
                12 January 2016
                : 58
                : 21-48
                Affiliations
                [1 ]University of Campinas, Institute of Biology, Department of Plant Biology, P.O. Box 6109, 13083-970, Campinas, SP, Brazil
                [2 ]R. Mário de Nucci, 500, Cidade Universitária, 13083-290, Campinas, SP, Brazil
                Author notes
                Corresponding author: Suzana Maria Costa ( suzanamscosta@ 123456gmail.com )

                Academic editor: R.P. Oliveira

                Article
                10.3897/phytokeys.58.5178
                4743013
                26884704
                569b9fad-a8d4-4ec6-ad6f-7c349b78870d
                Suzana Maria Costa, Tiago Domingos Mouzinho Barbosa, Volker Bittrich, Maria do Carmo Estanislau do Amaral

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                : 29 April 2015
                : 18 November 2015
                Categories
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                Plant science & Botany
                “campinaranas”,guiana shield,flora,aquatic macrophytes,escudo das guianas,macrófitas aquáticas

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