Over the hills and far away: New plant records for the Guayana Shield in Brazil
The Guayana Shield is one of the oldest geological formations in South America, ranging from southern Colombia, Venezuela, and the Guianas to the extreme north of the Brazilian states of Amazonas and Roraima. Because of its ancient origin and isolation from other mountain ranges in South America, it...
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Published in: | Brittonia Vol. 68; no. 4; pp. 397 - 408 |
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Main Authors: | , , , , , , , , |
Format: | Journal Article |
Language: | English |
Published: |
New York
The New York Botanical Garden Press
01-12-2016
Springer US Springer Nature B.V |
Subjects: | |
Online Access: | Get full text |
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Summary: | The Guayana Shield is one of the oldest geological formations in South America, ranging from southern Colombia, Venezuela, and the Guianas to the extreme north of the Brazilian states of Amazonas and Roraima. Because of its ancient origin and isolation from other mountain ranges in South America, it harbors a rich flora with high levels of endemism. Recent expeditions to remote areas in the Brazilian portion of the Guayana Shield generated many new herbarium collections. Through these efforts, we report the first records for Brazil of 57 species and infraspecific taxa of vascular plants. In most cases, the taxa are narrowly distributed and were previously known from nearby populations in other countries. In other cases, however, the new Brazilian records expand considerably the known geographical distributions of the taxa. O Escudo das Guianas é uma das formações geológicas mais antigas da América do Sul, que vai desde sul da Colômbia, Venezuela e as Guianas ao extremo norte dos estados brasileiros do Amazonas e Roraima. Devido a sua origem antiga e isolada de outras cadeias de montanhas da América do Sul, abriga uma rica flora com altos níveis de endemismo. Expedições recentes para áreas remotas na porção brasileira do Escudo das Guianas geraram novas coleções de herbário. Através destes esforços, relatamos os primeiros registros para o Brasil de 57 espécies e táxons infraespecíficos de plantas vasculares. Na maioria dos casos, os táxons eram previamente conhecidos a partir de populações próximas em países vizinhos. Em outros casos, porém, os novos registros brasileiros expandem consideravelmente as distribuições geográficas conhecidas dos táxons. |
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ISSN: | 0007-196X 1938-436X |
DOI: | 10.1007/s12228-016-9435-3 |