Recognition of two morpho-types in eastern South American brackens (Pteridium-Dennstaedtiaceae-Polypodiopsida)

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Federal de Viçosa (UFV)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorSchwartsburd, Pedro B.-
Autor(es): dc.creatorde Moraes, Pedro L. R.-
Autor(es): dc.creatorLopes-Mattos, Karina L. B.-
Data de aceite: dc.date.accessioned2025-08-21T16:10:21Z-
Data de disponibilização: dc.date.available2025-08-21T16:10:21Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2014-05-22-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.11646/phytotaxa.170.2.3-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/227767-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/227767-
Descrição: dc.descriptionIn this work we propose the recognition of two well defined morpho-types of Pteridium from eastern South America: P. arachnoideum subsp. arachnoideum s. str., wide-spread from north-eastern Brazil southwards to north-eastern Argentina and Uruguay, and P. arachnoideum subsp. campestre, comb. et stat. nov., endemic to north-eastern Brazil. Inevitably, we propose a narrower circumscription for P. arachnoideum subsp. arachnoideum, being restricted to eastern South America and characterized by free lobes between the distal segments, veins abaxially lanose with lax arachnoid hairs, and laminar tissue between the veins abaxially without farinose appearance, glabrous and visible (total absence of gnarled hairs). This morphological pattern is constant and stable in all 191 specimens studied (including living specimens), and geographically related. Plants from western South America and Central America, previously ascribed to P. arachnoideum s.l., shall be better reclassified into at least one other subspecies-for which no published name is current available. This is morphologically distinct and geographically segregated from P. arachnoideum subsp. arachnoideum s. str. by the South American Dry Diagonal. Based on stomatal guard-cells length, the two morpho-types from eastern South America are presumably diploid. We provide lectotypifications for the two taxa, complete and new synonymies, descriptions, illustrations, light microscopy images, distribution maps, and detailed information about the Pteridium specimens gathered in Brazil by Maximilian, the Prince of Wied, in the early 19th Century. We also indicate overlooked morphological characteristics with taxonomical value within the genus. © 2014 Magnolia Press.-
Descrição: dc.descriptionUniversidade Federal de Viçosa, Departamento de Biologia Vegetal, Av. P.H. Rolfs s.n, CEP 36570-000, Viçosa, Minas Gerais-
Descrição: dc.descriptionUniversidade Estadual Paulista 'Júlio de Mesquita Filho', Instituto de Biociências, Departamento de Botânica, Av. 24 A 1515, Bela Vista, C. P. 199, 13506-900, Rio Claro, São Paulo-
Descrição: dc.descriptionUniversidade Estadual Paulista 'Júlio de Mesquita Filho', Instituto de Biociências, Departamento de Botânica, Av. 24 A 1515, Bela Vista, C. P. 199, 13506-900, Rio Claro, São Paulo-
Formato: dc.format103-117-
Idioma: dc.languageen-
Relação: dc.relationPhytotaxa-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBracken fern-
Palavras-chave: dc.subjectPrince of Wied-Neuwied-
Palavras-chave: dc.subjectPteridium aquilinum-
Palavras-chave: dc.subjectPteris campestris-
Título: dc.titleRecognition of two morpho-types in eastern South American brackens (Pteridium-Dennstaedtiaceae-Polypodiopsida)-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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