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44 results for “Dennstaedtiaceae”
FIGURE 1. A–C in Formal recognition of six subordinate taxa within the South American bracken fern, Pteridium esculentum (P. esculentum subsp. arachnoideum s.l. -Dennstaedtiaceae), based on morphology and geography
FIGURE 1. A–C. Pteridium esculentum subsp. campestre: A. pinnule (Nonato 927), B. segment, abaxially (Schwartsburd 2411), C. segment, cross section, abaxial side up, showing strigose veins, with stiff, acicular hairs, and laminar tissue between the veins with farinaceous appearance, fully covered with gnarled hairs (Schwartsburd 2411), D–F. Pteridium esculentum subsp. arachnoideum var. arachnoideum: D. pinnule (Schwartsburd 2490), E. segment, abaxially (Schwartsburd 2490), F. segment, cross section, abaxial side up, showing serieceous veins, with lax, arachnoid hairs, and glabrous laminar tissue between the veins (Schwartsburd 2490). "s.d.s.": simple distal segments, "c.d.s.": compound distal segments. Drawn by R. Pinto, reproduced from Schwartsburd et al. (Phytotaxa 170(2): 105. 2014).
FIGURE 3. A–C in Formal recognition of six subordinate taxa within the South American bracken fern, Pteridium esculentum (P. esculentum subsp. arachnoideum s.l. -Dennstaedtiaceae), based on morphology and geography
FIGURE 3. A–C. Pteridium esculentum subsp. gryphus var. gryphus: A. pinnule (Gleason 423), B. segment, abaxially (Gleason 423), C. segment, cross section, abaxial side up, showing sericeous veins, with lax, arachnoid hairs, and laminar tissue between the veins with farinaceous appearance, fully covered by gnarled hairs (Gleason 423), D–F. Pteridium esculentum subsp. gryphus var. harpianum: D. pinnule ("B.W." 1121 [US-2019769]), E. segment, abaxially (Barreto 1623), F. segment, cross section, abaxial side up, showing veins abaxially nearly glabrous, and laminar tissue between the veins with farinaceous appearance, fully covered by gnarled hairs (Barreto 1623). Drawn by R. Pinto.
FIGURE 2 in Formal recognition of six subordinate taxa within the South American bracken fern, Pteridium esculentum (P. esculentum subsp. arachnoideum s.l. -Dennstaedtiaceae), based on morphology and geography
FIGURE 2. Distribution of Pteridium esculentum subsp. arachnoideum (red circles), P. esculentum subsp. campestre (green circles), and P. esculentum subsp. gryphus (blue circles) in South America.
FIGURE 7 in Formal recognition of six subordinate taxa within the South American bracken fern, Pteridium esculentum (P. esculentum subsp. arachnoideum s.l. -Dennstaedtiaceae), based on morphology and geography
FIGURE 7. Distribution of Pteridium esculentum subsp. arachnoideum (red circles), P. esculentum subsp. campestre (green circles), and P. esculentum subsp. arachnoideum × P. esculentum subsp. campestre (gray circles) in South America.
FIGURE 6 in Formal recognition of six subordinate taxa within the South American bracken fern, Pteridium esculentum (P. esculentum subsp. arachnoideum s.l. -Dennstaedtiaceae), based on morphology and geography
FIGURE 6. Distribution of Pteridium esculentum subsp. arachnoideum var. arachnoideum (red circles) and P. esculentum subsp. arachnoideum var. paedomorficum (purple circles) in South America.
FIGURE 2 in Recognition of two morpho-types in eastern South American brackens (Pteridium-Dennstaedtiaceae-Polypodiopsida)
FIGURE 2. Light microscopy of specimens of Pteridium subjected to diaphanization: A–C: P. arachnoideum subsp. arachnoideum s. str. (Schwartsburd 2255), D–G: P. arachnoideum subsp. campestre (Schwartsburd 2411). A, D: stomatal guard-cells, pointed by black arrows, B, E: veins ("V") and laminar tissue between the veins, abaxially (glabrous in P. arachnoideum subsp. arachnoideum (B), and obscured by gnarled hairs in P. arachnoideum subsp. campestre (E)), C, F: margins of the infertile pseudo-indusia. G: detail of a gnarled hair, pointed by black arrow. Bars = 50µm for all micrographs. Photograph by K.L.B. Lopes-Mattos.
FIGURE 1. A–C in Recognition of two morpho-types in eastern South American brackens (Pteridium-Dennstaedtiaceae-Polypodiopsida)
FIGURE 1. A–C. Pteridium arachnoideum subsp. campestre: A. pinnule (Nonato 927), B. segment, abaxially (Schwartsburd 2411), C. segment, cross section, abaxial side up, showing veins abaxially with stiff acicular hairs, and laminar tissue between the veins abaxially with gnarled hairs (Schwartsburd 2411), D–F. Pteridium arachnoideum subsp. arachnoideum s. str.: D. pinnule (Schwartsburd 2490), E. segment, abaxially (Schwartsburd 2490), F. segment, cross section, abaxial side up, showing veins abaxially with lax arachnoid hairs, and laminar tissue between the veins abaxially glabrous (Schwartsburd 2490). "s.d.s.": simple distal segments, "c.d.s.": compound distal segments. Drawn by R. Pinto.
FIGURE 3 in Recognition of two morpho-types in eastern South American brackens (Pteridium-Dennstaedtiaceae-Polypodiopsida)
FIGURE 3. Distribution of Pteridium taxa in eastern South America. Black circles: P. arachnoideum subsp. arachnoideum s. str., white triangles: P. arachnoideum subsp. campestre, A. Scheme of the Dry Diagonal (shaded area, by R. Pinto) in South America. B. Detailed distribution of Pteridium taxa in north-eastern Brazil, elevation in gray scale (from white to black) for each 500 m.
FIGURE 6 in An updated synopsis of Hypolepis Bernh. (Dennstaedtiaceae) from Argentina
FIGURE 6. Complete distribution map of Hypolepis poeppigii, H. rugosula subsp. poeppigiana, H. stolonifera var. delasotae and H. stolonifera var. stolonifera.
FIGURE 4. A–B in An updated synopsis of Hypolepis Bernh. (Dennstaedtiaceae) from Argentina
FIGURE 4. A–B. Spores of Hypolepis stolonifera var. delasotae. A. Proximal view at light microscope. B. Proximal view at scanning electron microscope. C–D. Spores of Hypolepis stolonifera var. stolonifera. C. Equatorial view at light microscope. D. Equatorial view at scanning electron microscope. Scale bar: A–D = 10 µm.
FIGURE 5. A–B. Hypolepis poeppigii. A. Habit. B in An updated synopsis of Hypolepis Bernh. (Dennstaedtiaceae) from Argentina
FIGURE 5. A–B. Hypolepis poeppigii. A. Habit. B. Detail of segments with rounded lobes at the margin. C–D. Hypolepis rugosula subsp. poeppigiana C. Habit. D. Detail of pinnules abaxially. Scale bars: A and C = 50 cm; B = 2 cm; D = 10 cm.
FIGURE 3. Hypolepis stolonifera var. stolonifera. A in An updated synopsis of Hypolepis Bernh. (Dennstaedtiaceae) from Argentina
FIGURE 3. Hypolepis stolonifera var. stolonifera. A. Rhizome long-creeping, branched. B. Distal Pinna. C. Detail of pinnule. D. Habit. E. Segment with laminar tissue between the veins abaxially glabrous. F. Detail of marginal sori. Pseudo-indusia membranaceous, the margins copiously ciliate. Scale bars: A and B = 5 cm; C = 2 cm; D = 50 cm; E and F = 0.2 cm.
FIGURE 2. Hypolepis stolonifera var. delasotae. A in An updated synopsis of Hypolepis Bernh. (Dennstaedtiaceae) from Argentina
FIGURE 2. Hypolepis stolonifera var. delasotae. A. Rhizome long-creeping, branched. B. Hairs of rhizome are catenate, acicular, yellowish brown to golden brown. C. Detail of rachis with two kinds of hairs: hairs catenate, brownish or withish and hairs uni-cellular, withish or hyaline. D. Rachis golden brown to light brown, villose. E. Basal pinnae with strongly inequilateral proximal pinnules. F. Laminar tissue between the veins abaxially villose. G. Detail of last pinnules. Sori marginal often confluent at maturity. H. Pseudo-indusia conspicuous, proximally green, distally hyaline, membranaceous in the hyaline part, the margin ciliate. Scale bars: A = 4 cm; B = 0.3 cm; C = 10 cm; D and E = 0.5 cm; F = 4 cm; G = 2 cm; H and I = 0.2 cm.
FIGURE 1. Hypolepis stolonifera var. delasotae. A. Habit. B in An updated synopsis of Hypolepis Bernh. (Dennstaedtiaceae) from Argentina
FIGURE 1. Hypolepis stolonifera var. delasotae. A. Habit. B. Abaxial surface of a segment. Scale bar: A = 20 cm; B = 0.3 cm.
Phylogenetic revision of Dennstaedtioideae (Dennstaedtiaceae: Polypodiales) with description of Mucura , gen. nov.
<p>We undertook a molecular phylogenetic revision of hayscented ferns (Dennstaedtiaceae: Dennstaedtioideae) using four plastid markers. Our sampling represents ca. 40% of the extant diversity and includes the type species for each of the relevant segregate genera. We coded 20 discrete morphological characters which we used to find diagnosable clades. We show that Dennstaedtia is polyphyletic, with the majority of species forming three morphologically distinct clades, but its type (D.flaccida) is nested within Microlepia. As such, we support the conservation of Dennstaedtiawith a new type, D.dissecta. Following our results, we develop a classification of four genera: Dennstaedtia, Microlepia, Mucura (gen. nov.), and Sitobolium. Beyond the inclusion of D.flaccida, we propose to maintain Microlepia with its current circumscription. Except for a single adventive species in the Neotropics, Microlepia is a Paleotropical genus of about 60 species diagnosed by their distinctive perispore ornamentation of rodlets, and by petioles that lack epipetiolar buds. Mucura is a Neotropical genus of two species that differ from all other Dennstaedtiaceae by the combination of dichotomously branching rhizomes, petioles that lack epipetiolar buds, marginal sori with both abaxial and adaxial indusia, and trilete spores with a unique perispore ornamentation. As defined here, Dennstaedtia is a pantropical genus of about 55 species recognized by having unbranched rhizomes, petioles bearing epipetiolar buds, and by often bearing proliferous buds upon the leaves. Sitobolium is a small clade of ca. five species distinguished by their relatively small leaves that have elongate catenate hairs. These hairs often bear a capitate non-glandular terminal cell. In support of our classification, we provide a key to the eleven genera of Dennstaedtiaceae, and for the four genera of Dennstaedtioideae we provide morphological and geographic synopses, a list of constituent species, and necessary new combinations.</p>
Phylogenetic revision of Dennstaedtioideae (Dennstaedtiaceae: Polypodiales) with description of Mucura , gen. nov.
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Figure 3 from: Morigengaowa, Luo J-J, Knapp R, Wei H-J, Liu B-D, Yan Y-H, Shang H (2018) The identity of Hypolepis robusta, as a new synonym of Hypolepis alpina (Dennstaedtiaceae), based on morphology and DNA barcoding and the new distribution. PhytoKeys 96: 35-45. https://doi.org/10.3897/phytokeys.96.23470
Figure 3 Distribution of intra-taxa (black) and inter-taxa (grey) Kimura two parameter (K2P) distances based on rbcL and trnL-F sequences as barcode. Hypolepis alpina and Hypolepis robusta versus the other species of Hypolepis.
Figure 2 from: Morigengaowa, Luo J-J, Knapp R, Wei H-J, Liu B-D, Yan Y-H, Shang H (2018) The identity of Hypolepis robusta, as a new synonym of Hypolepis alpina (Dennstaedtiaceae), based on morphology and DNA barcoding and the new distribution. PhytoKeys 96: 35-45. https://doi.org/10.3897/phytokeys.96.23470
Figure 2 Phylogeny of 16 Hypolepis samples and Blotiella stipitata, Histiopteris incisa, and Pteridium aquilinum subsp. wightianum based on rbcL and trnL-F. Bootstrap values and Bayesian posterior probabilities are shown along branches (ML/BI).
Figure 4 from: Morigengaowa, Luo J-J, Knapp R, Wei H-J, Liu B-D, Yan Y-H, Shang H (2018) The identity of Hypolepis robusta, as a new synonym of Hypolepis alpina (Dennstaedtiaceae), based on morphology and DNA barcoding and the new distribution. PhytoKeys 96: 35-45. https://doi.org/10.3897/phytokeys.96.23470
Figure 4 Hypolepis alpina. A Frond size (photographed by H. Shang in Fugong) B Lamina (photographed by R. Knapp in Nantou) C Hair (photographed by R. Knapp in Nantou) D The adventitious bud at stipe base (photographed by H. Shang in Fugong) E Indusium (photographed by R. Knapp in Nantou).
Figure 1 from: Morigengaowa, Luo J-J, Knapp R, Wei H-J, Liu B-D, Yan Y-H, Shang H (2018) The identity of Hypolepis robusta, as a new synonym of Hypolepis alpina (Dennstaedtiaceae), based on morphology and DNA barcoding and the new distribution. PhytoKeys 96: 35-45. https://doi.org/10.3897/phytokeys.96.23470
Figure 1 The distributions of Hypolepis alpina noted by Brownsey (1987, blue line) and new record localities since then (red stars), using a map available from http://219.238.166.215/mcp/index.asp.
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