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2,320 results for “Dryopteris”
FIG. 5 in The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul
FIG. 5. — Distribution of Dryopteris wallichiana (Spreng.) Hyl. subsp. madagascariensis (C.Chr.) J.P.Roux (Δ), and Dryopteris antarctica (Baker) C.Chr. (z). The solid square (·) indicates where both species occur.
FIG. 32 in The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul
FIG. 32. — Distribution of Nothoperanema squamiseta (Tagawa) Ching in Madagascar and la Réunion.
FIG. 29 in The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul
FIG. 29. — Distribution of Dryopteris wardii (Baker) Kuntze in the Seychelles islands group.
FIG. 24 in The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul
FIG. 24. — Distribution of Dryopteris subcrenulata (Baker) C.Chr. in Madagascar.
FIG. 21 in The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul
FIG. 21. — Distribution of Dryopteris pentheri (Krasser) C.Chr. in Madagascar and la Réunion.
FIG. 19 in The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul
FIG. 19. — Specimen of Dryopteris pentheri (Krasser) C.Chr., Croat 29928 (MO3295935).
FIG. 27 in The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul
FIG. 27. — Distribution of Dryopteris kilemensis (Kuhn) Kuntze in Madagascar.
FIG. 30 in The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul
FIG. 30. — Specimen of Nothoperanema squamiseta (Tagawa) Ching, Roux 3251 (NBG0221782-0).
FIG. 13 in The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul
FIG. 13. — Distribution of Dryopteris bojeri (Baker) Kuntze in Mauritius.
FIG. 11 in The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul
FIG. 11. — Isosyntype of Dryopteris bojeri (Baker) Kuntze, Bojer s.n. (M0065885).
FIG. 10 in The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul
FIG. 10. — Distribution of Dryopteris bernieri Tardieu in la Réunion and Comoro Islands (•).
FIG. 8 in The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul
FIG. 8. — Specimen of Dryopteris bernieri Tardieu, Bewsher s.n. (K).
FIG. 7 in The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul
FIG. 7. — Distribution of Dryopteris aquilinoides (Desv.) C.Chr. in Mauritius and la Réunion.
DP1845 – Phegopteris dryopteris (L.) Fée (Cystopteridaceae) – Détermination valide. in L'herbier Daniel Pellé (DP) - La collection d'un botaniste amateur de l'Aube (France)
DP1845 – Phegopteris dryopteris (L.) Fée (Cystopteridaceae) – Détermination valide.
Data from: Leaf form and photosynthetic physiology of Dryopteris species distributed along light gradients in eastern North America
1.Despite the ubiquity of ferns and at least tacit recognition by botanists that their physiology is unique among land plants, most studies on fern physiology have focused on only a few, locally distributed, usually distantly related species. No previous study has attempted to examine physiological adaptations in a group of widespread taxa that are closely related and whose relationships are well understood. Here we report leaf form and physiological measures for such a group, the eleven eastern North American species of Dryopteris (Dryopteridaceae), and examine differences in these parameters for evidence of adaptation to light availability. 2.Economic theory predicts that species from sunnier habitats should have narrower, more steeply inclined leaves, lower specific leaf area, higher stomatal density, higher rates of maximum photosynthesis, respiration, and stomatal conductance, and require more light to saturate photosynthesis. Species should show adaptive cross-over in net carbon uptake per unit leaf mass, with a relative advantage by sun-associated species at high photon flux densities (PFDs) and by shade-associated species at low PFDs. 3.Field studies allow us to begin characterizing the range of native light environments occupied by members of this group, and to examine interspecific variation in several aspects of leaf form and photosynthetic light response for evidence of adaption to light availability. We also present a novel means for incorporating phylogeny in tests of correlated evolution in a reticulate lineage. 4.Synthesis. Observed trends in physiology and morphology generally agree with qualitative predictions, but are often not statistically significant. We found no support for adaptive cross-over in mass-based carbon uptake, and thus for light availability being the most important variable driving morphological and physiological adaptation in these ferns. We propose that hydraulic factors related to water balance may have played a larger role in determining their morphological and physiological variation. Allopolyploid hybrids did not show transgression in any physiological parameter that may have allowed them to coexist regionally with their parents. The results of our phylogenetically-structured analyses highlight the importance of incorporating phylogeny into comparative studies, particularly when hybrid or polyploid taxa are present.
Dryopteris marginalis decontaminated FSCR
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FIGURE 4 in Dryopteris sukungiana (Dryopteridaceae), a new species of the D. sparsa complex from Southwest China
FIGURE 4. Maximum likelihood phylogram of Dryopteris sect. Diclisodon based on nine plastid regions. ML bootstrap support (MLBS) values and the posterior probabilities of Bayesian inference (BIPP) are indicated near nodes, with MLBS over the branches and BIPP under the branches. The thickened branch indicates MLBS=100% and BIPP=1.00.
FIGURE 1 in Dryopteris sukungiana (Dryopteridaceae), a new species of the D. sparsa complex from Southwest China
FIGURE 1. Photos of Dryopteris sukungiana (Z.Y. Zuo 4660). A. Habit. B. Young plant. C. Rhizome. D. Portion of lamina. E. Sori on ultimate pinnules. F. Glandular hairs on the rachis and costa, an indusium, and small fibrillose scales on the rachis and costa. G. Scales of stipe.
FIGURE 5 in Dryopteris sukungiana (Dryopteridaceae), a new species of the D. sparsa complex from Southwest China
FIGURE 5. Maximum likelihood phylogram of Dryopteris sect. Diclisodon based on nuclear gene AK1. ML bootstrap support (MLBS) values and the posterior probabilities of Bayesian inference (BIPP) are indicated near nodes, with MLBS over the branches and BIPP under the branches.
FIGURE 3 in Dryopteris sukungiana (Dryopteridaceae), a new species of the D. sparsa complex from Southwest China
FIGURE 3. Morphological comparison of the Sino-Himalayan Dryopteris sparsa (A, D & G), D. sukungiana (B, E & H), and the Sino-Japanese D. sparsa (C, F & I). A–C. Frond. D–F. Scales of stipes. G–I. Details of ultimate pinnule.
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