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81 results for “tree ferns”
FIGURE 2. A in A new hybrid and further taxonomic notes on Brazilian tree ferns (Cyatheaceae)
FIGURE 2. A. Petiolar scale of Cyathea corcovadensis s. str. (Schwartsburd 3455 [VIC]). B. Petiolar scale of C. ×stella-matutina (Schwartsburd 3303 [VIC]). C. Petiolar scale of C. microdonta (Schwartsburd 3462 [VIC]). Bar of 0.5 cm.
FIGURE 1. A in A new hybrid and further taxonomic notes on Brazilian tree ferns (Cyatheaceae)
FIGURE 1. A. Lamina apex of Cyathea corcovadensis s. str. (Bovini 1537 [VIC]). B. Lamina apex of C. microdonta (Schwartsburd 3300 [VIC]). C–G. Cyathea ×stella-matutina (Schwartsburd 3303 [VIC]): C. Lamina apex. D. Petiolar aculei. E–G. Medial pinnules, showing variation on degree of dissection and size.
FIGURE 2 in Cyathea ruttenbergii, a new tree fern (Cyatheaceae, Polypodiopsida) from Puerto Rico
FIGURE 2. Field characters of Cyathea ruttenbergii and similar species. A. Cyathea ruttenbergii, fertile frond, adaxially (Luquillo Mountains, Rio Grande, Puerto Rico). B. Cyathea pungens, fertile frond, adaxially (Pilcopata, Cusco, Peru). C. Cyathea borinquena, fertile frond, adaxially (Luquillo Mountains, Rio Grande, Puerto Rico). D. Cyathea ruttenbergii, trunk apex. E. Cyathea pungens, trunk apex. F. Cyathea borinquena, trunk apex. G. Cyathea ruttenbergii, petiole. H. Cyathea pungens, petiole. I. Cyathea borinquena, petiole. All photos by A. Tejedor.
FIGURE 3. Cyathea leoniae. A in Cyathea leoniae (Cyatheaceae), a new pinnate-pinnatifid tree fern species from Northern Peru
FIGURE 3. Cyathea leoniae. A. SEM pictures of globose sorus with sphaeropteroid indusium. B. Adaxial view of open sorus with several remaining sporangia. C. Lateral view of two sporangia with their annulus. D. Distal (above) and equatorial (below) view of verrucate spore (from holotype, Acuña 1448). Scale bars—100 μm.
FIGURE 2. Cyathea leoniae. A in Cyathea leoniae (Cyatheaceae), a new pinnate-pinnatifid tree fern species from Northern Peru
FIGURE 2. Cyathea leoniae. A. Plant in its natural habitat. B. Concolorous, orange-brown petiole scales. C. Adaxial side of frond. D. Sphaeropteroid indusia on abaxial side (from holotype, Acuña 1448). Photographs by Elluz Huamán-Melo.
FIGURE 1 in Cyathea leoniae (Cyatheaceae), a new pinnate-pinnatifid tree fern species from Northern Peru
FIGURE 1. Illustration of Cyathea leoniae. A. Pinna, adaxial view. B. Fertile segments, abaxial view. C. Frond. D. Petiole scale. E. Margin of petiole scale. F. Flat squamule of pinnae. G. Subullate squamule of pinnae (from holotype, Acuña 1448). Drawing by Margoth Acuña-Tarazona & Elluz Huamán-Melo.
FIGURE 1. A–B. Cyathea corcovadensis. A in A proposal to distinguish several taxa in the Brazilian tree fern Cyathea corcovadensis (Cyatheaceae)
FIGURE 1. A–B. Cyathea corcovadensis. A. Pinna, silhouette (D.B.G. Bussmann 90, JOI); B. Detail of fertile pinnule, abaxially (N.P. Smith 330, FLOR). C–D. Cyathea feeana. C. Pinna, silhouette (A.F. Regnell 479, S); D. Detail of fertile pinnule, abaxially (G. Hatschbach 23226, MBM). E. Cyathea miersii. Pinna, silhouette (J. Miers 149, B). Same scale for all pinnae and details, respectively.
FIGURE 2 in A proposal to distinguish several taxa in the Brazilian tree fern Cyathea corcovadensis (Cyatheaceae)
FIGURE 2. Distributions of A. Cyathea atrovirens; B. Cyathea corcovadensis; C. Cyathea feeana; D. Cyathea miersii.
Figure 104. Most parsimonious tree obtained from the analysis using 68 in The tribe Bryocorini (Insecta: Heteroptera: Miridae: Bryocorinae): phylogeny, description of a new genus, and adaptive radiation on ferns
Figure 104. Most parsimonious tree obtained from the analysis using 68 morphological characters (tree length = 213 steps; consistency index, CI = 0.52; retention index, RI = 0.79). Characters are plotted showing fast optimization. Filled circles, non-homoplastic characters mapped by state (discontinuous characters are mapped as homoplasy); open circles, homoplastic characters. Nodes 1–15 are discussed in the text.
FIGURE 1. Sphaeropteris guangxiensis Y.F in Sphaeropteris guangxiensis Y. F. Gu & Y. H. Yan (Cyatheaceae), a new species of tree fern from Southern China
FIGURE 1. Sphaeropteris guangxiensis Y.F. Gu & Y.H. Yan.—A. One pinna.—B. Pinnule segments.—C. Spores.
FIGURE 2. Sphaeropteris guanxiensis.—A & B. Habit.—C in Sphaeropteris guangxiensis Y. F. Gu & Y. H. Yan (Cyatheaceae), a new species of tree fern from Southern China
FIGURE 2. Sphaeropteris guanxiensis.—A & B. Habit.—C. Petioles and scales on the trunk.—D & E. Petiole crosscutting and the annular vascular bundles (photographed by Jun-Jie Luo).—F, G & H. Spore morphology.
Data from: Origins of the endemic scaly tree ferns on the Galápagos and Cocos Islands
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Data from: Historical reconstruction of climatic and elevation preferences and the evolution of cloud forest-adapted tree ferns in Mesoamerica
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Data from: Marcescence and prostrate growth in tree ferns are adaptations to cold tolerance
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Figs. 1 A-C in Population structure of the endangered tree fern Cyathea praecincta (Cyatheaceae), endemic of the Brazilian Atlantic Forest
Figs. 1 A-C. Spatial distribution of Cyathea praecincta in an Atlantic Forest fragment in Northeastern Brazil. A. Total individuals sampled within 25m²; B. Spatial distribution of sterile C. praecincta individuals within 25m²; C. Spatial distribution of fertile of C. praecincta individuals within 25m². Ia= Aggregation index; the highly clustered pattern in the population is represented by the black patches.
Data from: Global biogeography of scaly tree ferns (Cyatheaceae): evidence for Gondwanan vicariance and limited transoceanic dispersal
Aim: Scaly tree ferns, Cyatheaceae, are a well-supported group of mostly tree-forming ferns found throughout the tropics, the subtropics and the south-temperate zone. Fossil evidence shows that the lineage originated in the Late Jurassic period. We reconstructed large-scale historical biogeographical patterns of Cyatheaceae and tested the hypothesis that some of the observed distribution patterns are in fact compatible, in time and space, with a vicariance scenario related to the break-up of Gondwana. Location: Tropics, subtropics and south-temperate areas of the world. Methods: The historical biogeography of Cyatheaceae was analysed in a maximum likelihood framework using Lagrange. The 78 ingroup taxa are representative of the geographical distribution of the entire family. The phylogenies that served as a basis for the analyses were obtained by Bayesian inference analyses of mainly previously published DNA sequence data using MrBayes. Lineage divergence dates were estimated in a Bayesian Markov chain Monte Carlo framework using beast. Results: Cyatheaceae originated in the Late Jurassic in either South America or Australasia. Following a range expansion, the ancestral distribution of the marginate-scaled clade included both these areas, whereas Sphaeropteris is reconstructed as having its origin only in Australasia. Within the marginate-scaled clade, reconstructions of early divergences are hampered by the unresolved relationships among the Alsophila, Cyathea and Gymnosphaera lineages. Nevertheless, it is clear that the occurrence of the Cyathea and Sphaeropteris lineages in South America may be related to vicariance, whereas transoceanic dispersal needs to be inferred for the range shifts seen in Alsophila and Gymnosphaera. Main conclusions: The evolutionary history of Cyatheaceae involves both Gondwanan vicariance scenarios as well as long-distance dispersal events. The number of transoceanic dispersals reconstructed for the family is rather few when compared with other fern lineages. We suggest that a causal relationship between reproductive mode (outcrossing) and dispersal limitations is the most plausible explanation for the pattern observed.
Data from: Global biogeography of scaly tree ferns (Cyatheaceae): evidence for Gondwanan vicariance and limited transoceanic dispersal
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Weichselia Mantelli Tree Fern Fossil
Cretaceous period tree-fern Weichselia mantelli (one of several Wealden species named after Gideon Mantell) from the Tunbridge Wells Sand, excavated from Mountfield Road, Tunbridge Wells, UK, in 1895. Digital asset created as part of the 'A Mirror For Remembering' artwork commission by Alex May: http://amirrorforremembering.com/ A Mirror for Remembering is a major new virtual reality artwork by Alex May exploring the complexities and growing necessity to address the preservation and permanence of the digital artefacts that form an increasing part of our everyday lives. This commission has been made possible through the generous support of the Arts Council England funded Kent Medway Museums National Portfolio Organisation and tilises the extensive collections held by Tunbridge Wells Borough Council. Source: Objaverse 1.0 / Sketchfab
The invaded range of the tree fern, Sphaeropteris cooperi, is predicted to shrink in two southern hemisphere biodiversity hotspots
<p>This dataset relates to a study on the distribution of the Australian tree fern <em>Sphaeropteris cooperi. </em>All distribution data comes from GBIF. Climate data come from CHELSA.</p> <p>This data is associated with the manuscript van den Berg et al <span>(2025) The invaded range of the tree fern Sphaeropteris cooperi is predicted to shrink in two southern hemisphere biodiversity hotspots. South African Journal of Botany 178: 390-399. DOI: 10.1016/j.sajb.2025.01.046</span></p>
Fossil Weichselia Mantelli Tree Fern -Cretaceous
Cretaceous period tree-fern Weichselia mantelli (one of several Wealden species named after Gideon Mantell) from the Tunbridge Wells Sand, excavated from Mountfield Road, Tunbridge Wells, UK, in 1895. Digital asset created as part of the 'A Mirror For Remembering' artwork commission by Alex May: http://amirrorforremembering.com/ A Mirror for Remembering is a major new virtual reality artwork by Alex May exploring the complexities and growing necessity to address the preservation and permanence of the digital artefacts that form an increasing part of our everyday lives. This commission has been made possible through the generous support of the Arts Council England funded Kent Medway Museums National Portfolio Organisation and tilises the extensive collections held by Tunbridge Wells Borough Council. Source: Objaverse 1.0 / Sketchfab
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.