Results 31 to 40 of about 210 (139)
Polyploidy and Speciation in Pteris (Pteridaceae)
Journal of Botany, Volume 2012, Issue 1, 2012., 2012 The highest frequency of polyploidy among plants is considered to occur in the Pteridophytes. In this study, we focused on polyploidy displayed by a specific fern taxon, the genus Pteris L. (Pteridaceae), comprising over 250 species. Cytological data from 106 Pteris species were reviewed. The base number of chromosomes in Pteris is 29.
Yi-Shan Chao +4 more
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Bangiales (Rhodophyta) in New Zealand: current state of knowledge and future directions
New Zealand Journal of Botany, Volume 63, Issue 5, Page 2245-2263, December 2025.ABSTRACT Members of the red algal order Bangiales are morphologically simple, with the gametophyte generation consisting of either filaments or blades, and the sporophyte generation consisting of microscopic uniseriate branched filaments. An ancient lineage, the order is distributed worldwide.
Wendy A. Nelson, Giuseppe C. Zuccarello
wiley +1 more source
Botanical Gazette, 1919 (Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire +3 more sources
Pollinator benefits of small‐scale landscapes depend also on semi‐natural habitat
Journal of Applied Ecology, Volume 62, Issue 9, Page 2249-2260, September 2025.Mass‐flowering crops and nearby semi‐natural habitats enhance colony growth and queen production, emphasising the important role of abundant and diversified flower resources as well as neighbouring semi‐natural habitats. Further, landscapes shaped by small‐scale farming are crucial for sustaining and enhancing pollinator populations.
Riho Marja +9 more
wiley +1 more source
Ploidy level and obligate apogamy in two populations of Argyrochosma nivea var. tenera (Pteridaceae)
HoehneaArgyrochosma nivea var. tenera is a cheilanthoid fern from the American continent. We present herewith the study of meiotic behavior and gametic number as well as number of spores and reproduction mode (with observations from cultured gametophytes).
Marcela A. Hernández +3 more
doaj +1 more source
Revista de Biología Tropical, 2011 Los helechos y licófitas tienen diversas estrategias reproductivas que las habilitan para invadir ambientes perturbados y áreas sin vegetación. En este trabajo se estudió la presencia, abundancia y estrategias reproductivas de individuos que crecen en ...
Ma. Lucía Rodríguez Romero +2 more
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Functional Ecology, Volume 38, Issue 12, Page 2576-2594, December 2024.Read the free Plain Language Summary for this article on the Journal blog. Abstract There is strong evidence that landscape‐scale factors such as habitat diversity, composition and configuration are important drivers of declines in pollinators and pollination services.
Mark A. K. Gillespie +17 more
wiley +1 more source
Apogamy in Nephrodium hertipes [PDF]
Botanical Gazette, 1915 (Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire +2 more sources
Revista de Biología Tropical, 1999 Se describe y se compara la morfogénesis de la fase sexual de seis especies de Dryopteris. Las esporas son monoletes, elipsoidales con perina de color pardo a pardo obscuro, su superficie es rugosa de contornos tuberculados y la perina en forma de ...
Blanca Pérez-García +3 more
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Revista de Biología Tropical, 2001 Se describe y se compara la morfogénesis de la fase sexual de seis especies mexicanas de Dryopteris. Las esporas de todas las especies estudiadas son monoletes y elipsoidales, la perina es plegada, de color pardo claro a pardo obscuro, su superficie es ...
Blanca Pérez-García +3 more
doaj