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27 results for “Hymenophyllales”
FIGURE 13 in Disentangling the diversity and taxonomy of Hymenophyllaceae (Hymenophyllales, Polypodiidae) in the Mascarene archipelago, with ecological implications
FIGURE 13. Didymoglossum cuspidatum (Willd.) Ebihara & Dubuisson. A. Typical sub-circular, and lanceolate to deltoid sterile forms as usually observed (La Réunion, 'Mare Longue'). B. Linear sterile forms (La Réunion, 'Grand Etang'). C. Ovate to lanceolate fertile fronds with apical sori (La Réunion, 'Forêt de Bon Accueil, Les Makes'). D. Narrowly lanceolate fertile frond with apical sori (La Réunion, 'Grand Etang'). E. Small sub-circular/ovate fertile frond with a single sorus, showing sub-marginal false vein (mfv) and false veins parallel to true veins (fv) (photographs. A–D: J.-Y. Dubuisson; E: L. Bauret).
FIGURE 17. A in Disentangling the diversity and taxonomy of Hymenophyllaceae (Hymenophyllales, Polypodiidae) in the Mascarene archipelago, with ecological implications
FIGURE 17. A. Hymenophyllum balfourii Baker, holotype (La Réunion, I.B. Balfour s.n., K000435603). B. H. inaequale (Poir.) Desv., as epiphyte, narrowly lanceolate form (La Réunion, 'Mare Longue'). C. H. inaequale, widely lanceolate to ovate form (La Réunion, 'Forêt de Bon Accueil, Les Makes'). D. H. inaequale, detail of glabrous segments and sori (photographs. B. L. Bauret; C–D: J.-Y. Dubuisson).
FIGURE 1 in Disentangling the diversity and taxonomy of Hymenophyllaceae (Hymenophyllales, Polypodiidae) in the Mascarene archipelago, with ecological implications
FIGURE 1. Location of the Mascarene Archipelago (or Mascarenes) in the western Indian Ocean (from Pynee et al. 2012).
FIGURE 16. A in Disentangling the diversity and taxonomy of Hymenophyllaceae (Hymenophyllales, Polypodiidae) in the Mascarene archipelago, with ecological implications
FIGURE 16. A. Hymenophyllum hirsutum (L.) Sw., as epiphyte (La Réunion, 'Grand Etang'). B. H. hirsutum, detail of a frond showing the hairy winged stipe. C. H. hirsutum, detail of bilabiate hairy sori. D. H. hygrometricum (Poir.) Desv., as epiphyte (La Réunion, 'Bébour'). E. H. hygrometricum, wet fronds become greener as shown here (photographs. A: J.-Y. Dubuisson; B–C: L. Bauret; D–E: C. Chaussidon).
FIGURE 20 in Disentangling the diversity and taxonomy of Hymenophyllaceae (Hymenophyllales, Polypodiidae) in the Mascarene archipelago, with ecological implications
FIGURE 20. Elevational distribution on each Hymenophyllaceae taxon on the windward (red plots) and leeward (blue plots) sides of La Réunion, and correspondence with thermal zones or ranges according to Cadet (1980) and provided here for the windward side, with ranges of annual average temperatures. The dotted horizontal lines correspond to the limits of leeward ecosystems. The plots indicate the average elevation. Crepidomanes trinerve is here lacking because it was only observed at a single locality on the leeward side ('Les Canots' at ~800 m). The range of each taxon, as illustrated by the vertical lines, is assumed to correspond to the range between the minimum and the maximum elevation at which they have been observed, even if the taxon has not been observed in all the intermediate localities between such limits.
Data from: Order-level fern plastome phylogenomics: new insights from Hymenophyllales
PREMISE OF THE STUDY: Filmy ferns (Hymenophyllales) are a highly specialized lineage, having mesophyll one cell layer thick and inhabiting particularly shaded and humid environments. The phylogenetic placement of Hymenophyllales has been inconclusive, and while over 87 whole fern plastomes have been published, none was from Hymenophyllales. To better understand the evolutionary history of filmy ferns, we sequenced the first complete plastome for this order. METHODS: We compiled a plastome phylogenomic dataset encompassing all eleven fern orders, and reconstructed phylogenies using different data types (nucleotides, codons, and amino acids) and partition schemes (codon positions and loci). To infer the evolution of fern plastome organization, we coded plastomic features, including inversions, inverted repeat boundary shifts, gene losses, and tRNA anticodon sequences as characters, and reconstructed the ancestral states for these characters. KEY RESULTS: We discovered a suite of novel, Hymenophyllales-specific plastome structures that likely resulted from repeated expansions and contractions of the inverted repeat regions. Our phylogenetic analyses reveal that Hymenophyllales is highly supported as either sister to Gleicheniales or to Gleicheniales + the remaining non-Osmundales leptosporangiates, depending on the data type and partition scheme. CONCLUSIONS: Although our analyses could not confidently resolve the phylogenetic position of Hymenophyalles, the results here highlight the danger of drawing conclusions from "all-in" phylogenomic dataset without exploring potential inconsistencies in the data. Finally, our first order-level reconstruction of fern plastome structural evolution provides a useful framework for future plastome research.
Data from: Order-level fern plastome phylogenomics: new insights from Hymenophyllales
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