The Ferns and Fern-allies (Pteridophyta) of the Cape Verde Islands, West-Africa

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The Ferns and Fern-allies (Pteridophyta) of the Cape Verde Islands, West-Africa
The present publication revises the 34 known species of ferns and fern-allies from the Cape Verde Islands. The work is based on herbarium material and material gathered by the senior author during nine excursions and comprises 29 taxa. It was not possible to confirm the presence of two species (Asplenium (Ceterach) sp. and A. marinum), thus the actual number of species of pteridophytes on the archipelago is 32; it seems very unlikely that the two above mentioned species ever occurred. The present work is the first comprehensive account for 80 years. The phytogeographical analysis shows a large proportion of species to have a world-wide or palaeotropic distibution. Only six taxa (Asplenium aethiopium ssp. braithwaitii, Asplenium hemionitis, Davallia canariensis, Diplazium caudatum, Dryopteris oligodonta, Notholaena maramae ssp. subcordata) demonstrate a relationship to the neighbouring Canary Islands. Neste trabalho faz-se a revisão de 34 espécies de pteridófitos referidas para o Arquipélago de Cabo Verde. Esta revisão baseia-se em material de herbário e naquele que foi herborizado por um dos autores (Lobin) durante 9 excursões e que correspondem a 29 taxa. Não foi possivel confirmar a presença de duas espécies (Asplenium (Ceterach) sp. e A. marinum), assim o número total de taxa de pteridófitos no arquipélago e de 32. E muito provável que aquelas duas espécies nunca tenham ocorrido nas ilhas caboverdianas. Este trabalho é a primeira revisão ampla e profunda desde há 80 anos. A análise fitogeográfica revela uma grande proporção de espécies de ampla distribuição ou palaeotropicais. Somente seis taxa (Asplenium aethiopium ssp. braithwaitii, Asplenium hemionitis, Davallia canariensis, Diplazium caudatum, Dryopteris Oligodonta, Notholaena marantae ssp. subcordata) estão relacionadas com a flora das vizinhas Ilhas Canarias.

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80 % of the price goes directly to the author.

ISBN: 9783443510374

Language: English

Publication date: 1998

Number of pages: 115

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