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112 results for “Cyatheaceae”
FIGURE 2 in Cyathea Sm. (Cyatheaceae) on Trindade Island (Brazil): An integrative approach
FIGURE 2. Cladogram obtained from Bayesian Inference of Cyathea based on all three plastid markers, and indels coded by simple indel coding. Numbers above branches are bootstrap support for maxmimum parsimony, maximum likelihood and Bayesian posterior probabilities, respectively. Cyathea delgadii samples 1 to 4 originate from Trindade Island. The acronyms in parentheses indicate the geographic origin (Brazilian state) of the specimens.
FIGURE 3 in Cyathea Sm. (Cyatheaceae) on Trindade Island (Brazil): An integrative approach
FIGURE 3. Combined PCA data between populations from Cerrado represented as squares and Atlantic Forest represented as circles. L.pina = length of pinnae; L.pinu = length of pinnules and W.pinu = width of pinnules.
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.
A contribution to Gymnosphaera (Cyatheaceae) in mainland Asia: two new species, reinstatement of Cyathea bonii, and their phylogenetic positions
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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.
FIGURE 10. Cyathea kalbreyeri. A in Do you know Cyathea divergens (Cyatheaceae-Polypodiopsida)?
FIGURE 10. Cyathea kalbreyeri. A. Pinna. (Kalbreyer 1375, B).
FIGURE 5. Cyathea ebenina. A in Do you know Cyathea divergens (Cyatheaceae-Polypodiopsida)?
FIGURE 5. Cyathea ebenina. A. Pinna (Karsten s.n., B).
FIGURE 12 in Do you know Cyathea divergens (Cyatheaceae-Polypodiopsida)?
FIGURE 12. Cyathea latevagans growing in seepage area, Prov. Cuzco, Peru. (© Adrian Tejedor)
Data from: Global biogeography of scaly tree ferns (Cyatheaceae): evidence for Gondwanan vicariance and limited transoceanic dispersal
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FIGURE 3 in Sphaeropteris guangxiensis Y. F. Gu & Y. H. Yan (Cyatheaceae), a new species of tree fern from Southern China
FIGURE 3. Fiddleheads and sori on pinnule segments.—A & D. Sphaeropteris brunoniana.—B & E. S. guangxiensis.—C & F. S. hainanensis.
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