Results 31 to 40 of about 5,514 (193)

Morpho-anatomical characterization and conservation status of the Whisk Fern Psilotum nudum (L.) P.Beauv. (Polypodiopsida: Psilotaceae) from Cooch Behar District of West Bengal, India

open access: goldJournal of Threatened Taxa
The district Cooch Behar of West Bengal, India is considered a unique zone for pteridophytes. The Whisk Fern Psilotum nudum (Family Psilotaceae), one of the primitive members of living vascular plants considering its age of evolution during the Devonian,
Aninda Mandal
semanticscholar   +3 more sources

Cyathea fabiolae (Cyatheaceae, Polypodiopsida), a new scaly tree fern from the northern Andes

open access: goldPhytotaxa, 2022
A new species of Cyathea is described for Peru and Ecuador. The new species differs from congeners by a combination of traits including glabrescent and scurfless mature axes abaxially, concolorous orange-brown petiole scales, winged costae, and lack of ...
Adrian Tejedor   +3 more
semanticscholar   +3 more sources

Notas nomenclaturais em Aspleniaceae (Polypodiopsida) ocorrentes no Brasil [PDF]

open access: yesRodriguésia, 2010
Resumo Como parte do estudo taxonômico das Aspleniaceae da flora brasileira, são designados nove lectótipos e propostos sete sinônimos novos. É apresentada uma combinação nova, Asplenium balansae (Baker) Sylvestre e duas mudanças de status, Asplenium ...
Lana da Silva Sylvestre
doaj   +3 more sources

DIVERSITY AND DISTRIBUTION OF THE THELYPTERIDACEAE (POLYPODIOPSIDA) IN PAKISTAN

open access: yesThe Journal of Animal and Plant Sciences
The present taxonomic study of Thelypteridaceae (Polypodiopsida) in Pakistan is based on the study of fern specimens in 15 herbaria in Asia, Europe and USA.
M. Irfan, S. Fawcett
semanticscholar   +2 more sources

Checklist of Lycopodiopsida (clubmosses and quillworts) and Polypodiopsida (ferns) of Rwanda

open access: yesWilldenowia
: The checklist comprises 208 species and two varieties of Lycopodiopsida and Polypodiopsida. All historic literature records, mainly from Brause & Hieronymus (1910) and Pichi Sermolli (1983, 1985) have been revised.
Eberhard Fischer, W. Lobin
semanticscholar   +2 more sources

Catálogo de las Licofitas (Lycopodiopsida) y Helechos (Polypodiopsida) nativos de Chile

open access: yesGayana: Botanica
Las Lycopodiopsida (licófitas) y Polypodiopsida (helechos), conocidos clásicamente como “pteridofitos”, juntos representan los primeros linajes vivientes de plantas con un sistema vascular en el esporofito.
Javian G. Gallardo-Valdivia   +3 more
doaj   +2 more sources

Gametophytic phase of "Doryopteris triphylla" (Pteridaceae, Polypodiopsida).

open access: diamondBotanica Complutensis, 2016
Gametophytes of the Pteridaceae are moderately well known but there is still a quite large set of species to describe. Among these is Doryopteris triphylla, a member of the cheilanthoid clade (subgroup hemionitids). The main objective of this work is to describe the gametophyte of D. triphylla.
Andrea Seral   +1 more
openalex   +6 more sources

Hymenophyllaceae (Polypodiopsida) na Mesorregião Metropolitana de Belém, Estado do Pará, Brasil [PDF]

open access: yesRodriguésia, 2015
ResumoHymenophyllaceae (Polypodiopsida) na Mesorregião Metropolitana de Belém, estado do Pará, Brasil. No Brasil, bem como na Amazônia brasileira, a maioria das informações referentes a Hymenophyllaceae está contida em inventários florísticos, sendo ...
Gisele Teixeira   +1 more
doaj   +3 more sources

The fern family Gleicheniaceae (Polypodiopsida) in Brazil

open access: goldPhytotaxa, 2018
We carried out a taxonomic study of the leptosporangiate fern family Gleicheniaceae (Polypodiopsida) in Brazil out and accepted 17 species distributed in three genera. Taxonomic descriptions to the whole family, genera and species are provided, as well as keys to the genera and species, synonymies, maps, illustrations, and notes.
Lucas Vieira Lima, Alexandre Salino
openalex   +3 more sources

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