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Pteropsida Stock Photos and Images
RMH42660–The USA, Hawaii, island Big Iceland, ferns, detail, the United States America, federal state, the Hawaiian Islands, Hawaiian Iceland, nature, botany, vegetation, plants, plant world, ferns, Filicopsida, Pteropsida, Filicatae, fern plants, colour mood, col
RMA3X3BG–botany, European waterclover, (Marsilea quadrifolia), in water, Marsileaceae, Marsileales, Filicatae, Pteropsida,
RMBRA2AM–Hart's tongue fern (Asplenium scolopendrium / Phyllitis scolopendrium) fronds unfurling in spring, Luxembourg
RF2R7E8H2–Davallia canariensis is a species of perennial fern of the Davalliaceae family. native to Spain, Portugal and Morocco. This photo was taken in Tafira,
RMRN70C7–. The anatomy of woody plants. Botany -- Anatomy. FIG. 177.—Diagrammatic representation of the Pteropsida. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Jeffrey, Edward C. (Edward Charles), b. 1866. Chicago, Ill. , The University of Chicago Press
RMBKNRAT–Onderkant van een blad van Gewone eikvaren met sporen; Underside of a leaf of Common polypody
![. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI] PTEROPSIDA 81. Several attempts have been recently made to determine whether Archaeopteris was a member of the Primofilices or a Pteridosperm, Kidston^ and others think the latter the more probable. We, however, agree with Johnson^ that there is absolutely no evidence that this very completely known type (at any rate in the case of A. hibernica) bore seeds. It is much more probably a Primofilix. The evidence of Rhacopteris, so far as it goes, agrees with this conclusion. On the other hand at least one Adiantit Stock Photo](https://c8.alamy.com/comp/PFA5T2/devonian-floras-a-study-of-the-origin-of-cormophyta-paleobotany-devonian-vi-pteropsida-81-several-attempts-have-been-recently-made-to-determine-whether-archaeopteris-was-a-member-of-the-primofilices-or-a-pteridosperm-kidston-and-others-think-the-latter-the-more-probable-we-however-agree-with-johnson-that-there-is-absolutely-no-evidence-that-this-very-completely-known-type-at-any-rate-in-the-case-of-a-hibernica-bore-seeds-it-is-much-more-probably-a-primofilix-the-evidence-of-rhacopteris-so-far-as-it-goes-agrees-with-this-conclusion-on-the-other-hand-at-least-one-adiantit-PFA5T2.jpg ". Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI] PTEROPSIDA 81. Several attempts have been recently made to determine whether Archaeopteris was a member of the Primofilices or a Pteridosperm, Kidston^ and others think the latter the more probable. We, however, agree with Johnson^ that there is absolutely no evidence that this very completely known type (at any rate in the case of A. hibernica) bore seeds. It is much more probably a Primofilix. The evidence of Rhacopteris, so far as it goes, agrees with this conclusion. On the other hand at least one Adiantit Stock Photo")
RMPFA5T2–. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI] PTEROPSIDA 81. Several attempts have been recently made to determine whether Archaeopteris was a member of the Primofilices or a Pteridosperm, Kidston^ and others think the latter the more probable. We, however, agree with Johnson^ that there is absolutely no evidence that this very completely known type (at any rate in the case of A. hibernica) bore seeds. It is much more probably a Primofilix. The evidence of Rhacopteris, so far as it goes, agrees with this conclusion. On the other hand at least one Adiantit
RMW1CYG3–Archive image from page 80 of Devonian floras; a study of. Devonian floras; a study of the origin of Cormophyta . devonianflorasst00arbe Year: 1921 vj ARCHAEOPTERIS Pteropsida. 59 Archaeopteris, Dawson, 1871 (Figs. 28-32). Fronds of large size, bipinnate with a stipiilar base, stipules in pairs, adnatc, and a ranicntum on the lower part of the petiole. Sterile pinnules typi- cally obo'ate or ovatc-cuneate, entire ortoothed, with a flabellate Fig. .31. Ardtaeoplerisfissilis, Schmalli., from tlic Upper Devonian of EUes- mereland. (Nat. size except fig. marked 9, which is x|.) After Nathorst
RMH3XH7E–The USA, Hawaii, island Big Iceland, Hawaiian Volcanoes Nationwide park, lava, fern, ash the United States America, federal state, the Hawaiian Islands, Hawaiian Iceland, national park, nature reserve, nature, botany, vegetation, remains, burntly, natural
RMBRA25E–Hart's tongue fern (Asplenium scolopendrium / Phyllitis scolopendrium) fronds unfurling in spring, Luxembourg
RMRN59RN–. The anatomy of woody plants. Botany -- Anatomy. THE LYCOPODIALES 257 to those appearing in the cortical region. It may accordingly be stated that even the imperfect evidence supplied by the stem of the lepidodendrids in a condition of obvious degeneracy of the primary stelar tissues when they are first presented on the pages of the geological record does not definitely justify the conclusion that the pith is of stelar origin. In a later chapter it will be made clear that the evidence supplied by the lower Pteropsida, which is at once more abundant and more decisive, dis- tinctly vouches for
RMPFA5RN–. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI PTEROPSIDA 83 we have something different in the way of a fructification to anything known among Carboniferous plants. On the other hand, that of the Psilophytic genus Broggeria (Fig. 17, p. 35) has at least some superficial resemblance to that of Cephalopteris. In both cases these fructifications may well arise from the metamorphosis of a tuft of finely divided branclilets, and may. Fig. 47. Aphlebiae oi Pecopleris (Dacfy- loiheca) plutnosa, (Art.), from the Coal Measures, showing persistence of thalloid fohag
RMH4173K–The USA, Hawaii, island Big Iceland, Hawaiian Volcanoes Nationwide park, lava, fern, ash the United States America, federal state, the Hawaiian Islands, Hawaiian Iceland, national park, nature reserve, nature, botany, vegetation, remains, burntly, natural
RMBRAGAC–Hart's tongue fern (Asplenium scolopendrium / Phyllitis scolopendrium) fronds unfurling in spring
RMRN72NK–. The anatomy of woody plants. Botany -- Anatomy. FIG. 96.—Rootstock of the bracken fern. FIG. 97.—Stem of Lepidodendron Spcnceri vascular system, and the sclerotic bands just described. The mechanical require- ments of the stems of many lower vas- cular plants are pro- vided for by skeletal structures present in the fundamental system. This situa- tion is common to both the Pteropsida and the Lycopsida. The truth of this statement is revealed by the figure presented of the stem of a lepidodendrid, a very ancient representative of the group of club mosses or Lycopsida. Here zones of thick-wall
![. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI] PTEROPSIDA 79 is first the Archaeopteris type of leaf. This arose from the meta- morphosis of the branches of the nth. order in a system which was at least bipinnate, if not more compound still. Each alternate branchlet was flattened out either into a sterile wedge- shaped leaf, with a radiating nervation, or metamorphosed into one or more sporangia. Every stage is clearly seen in Devonian species of Archaeopteris (Figs. 28-31, pp. 56-59). Further modifications of the wedge-shaped entire, primitive type of lea Stock Photo](https://c8.alamy.com/comp/PF9KDR/devonian-floras-a-study-of-the-origin-of-cormophyta-paleobotany-devonian-vi-pteropsida-79-is-first-the-archaeopteris-type-of-leaf-this-arose-from-the-meta-morphosis-of-the-branches-of-the-nth-order-in-a-system-which-was-at-least-bipinnate-if-not-more-compound-still-each-alternate-branchlet-was-flattened-out-either-into-a-sterile-wedge-shaped-leaf-with-a-radiating-nervation-or-metamorphosed-into-one-or-more-sporangia-every-stage-is-clearly-seen-in-devonian-species-of-archaeopteris-figs-28-31-pp-56-59-further-modifications-of-the-wedge-shaped-entire-primitive-type-of-lea-PF9KDR.jpg ". Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI] PTEROPSIDA 79 is first the Archaeopteris type of leaf. This arose from the meta- morphosis of the branches of the nth. order in a system which was at least bipinnate, if not more compound still. Each alternate branchlet was flattened out either into a sterile wedge- shaped leaf, with a radiating nervation, or metamorphosed into one or more sporangia. Every stage is clearly seen in Devonian species of Archaeopteris (Figs. 28-31, pp. 56-59). Further modifications of the wedge-shaped entire, primitive type of lea Stock Photo")
RMPF9KDR–. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI] PTEROPSIDA 79 is first the Archaeopteris type of leaf. This arose from the meta- morphosis of the branches of the nth. order in a system which was at least bipinnate, if not more compound still. Each alternate branchlet was flattened out either into a sterile wedge- shaped leaf, with a radiating nervation, or metamorphosed into one or more sporangia. Every stage is clearly seen in Devonian species of Archaeopteris (Figs. 28-31, pp. 56-59). Further modifications of the wedge-shaped entire, primitive type of lea
RMRDYRN7–. Principles of modern biology. Biology. 616 - Heredify and Evolution is very small. Indeed, in higher forms (gym- nosperms and angiosperms) both male and female gametophytes are microscopic (Fig. 12-19). The protection and nurturing of the embryonic sporophyte is exceptionally elfec- tive. Three large classes, each containing a wide variety of living species, have been evolved among the Pteropsida. These are: Class 1. The Filicineae—ferns Class 2. The (iymnospermae—cone- bearing [slants Class 3. The Angiospermae—flower- ing plants Among the Pteropsida, only the last two classes (Gymnospermae
RMPG2K3D–. Morphology of gymnosperms. Gymnosperms; Plant morphology. CONIFERALES (PINACEAE) 9.2g (Pteropsida) among pteridophytes (p. 9), and with them it is asso- ciated with large leaves. The contrast with Lycopsida (Lycopodiales, etc.), with small leaves and no leaf gaps, is complete. Since the coni-. FiG. 257.—Pinus Laricio: a cube from the secondary wood, reconstructed from three camera drawings and showing various features of coniferous wood; in trans- verse section at the left a few rows of small thick-walled cells of the autumn wood are shown, and at the right the larger thinner-walled cells of
RMRDH6F7–. Morphology of gymnosperms. Gymnosperms; Plant morphology. CONIFERALES (PINACEAE) 9.2g (Pteropsida) among pteridophytes (p. 9), and with them it is asso- ciated with large leaves. The contrast with Lycopsida (Lycopodiales, etc.), with small leaves and no leaf gaps, is complete. Since the coni-. FiG. 257.—Pinus Laricio: a cube from the secondary wood, reconstructed from three camera drawings and showing various features of coniferous wood; in trans- verse section at the left a few rows of small thick-walled cells of the autumn wood are shown, and at the right the larger thinner-walled cells of
RMPF9KFT–. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. vj ARCHAEOPTERIS Pteropsida. 59 Archaeopteris, Dawson, 1871^ (Figs. 28-32). Fronds of large size, bipinnate with a stipiilar base, stipules in pairs, adnatc, and a ranicntum on the lower part of the petiole. Sterile pinnules typi- cally obo'ate or ovatc-cuneate, entire ortoothed, with a flabellate. Fig. .31. Ardtaeoplerisfissilis, Schmalli., from tlic Upper Devonian of EUes- mereland. (Nat. size except fig. marked 9, which is x|.) After Nathorst (1904). 1 See Carruthers (1872); Kidston (1888); Nathorst (1902) and
RMRH53K9–. Brigham Young University science bulletin. Biology -- Periodicals. 40 Bricham Young University Science Bulletin PTEROPSIDA-GYMNOSPERMAE Pinaceae Pine Family Picea glauca (Moench) Voss Locality #16, Rigby 25, 23 June; #60, WR 10046, 30 June; #67, WR 10096, 1 July; #76, WR 10432, 10 July. On terraces, gravel bars, lake shores, and mountain slopes, in taiga and boreal forest. A dominant species. Picea mariana (Mill.) Britt, Stems., Pogg. Locality #50, WR 10509, 11 July. Tundra- taiga transition, an Kayak shale. This specimen has only a few hairs along the leaf base and lacks cones. It is tentat
![. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI] PTEROPSIDA 81. Several attempts have been recently made to determine whether Archaeopteris was a member of the Primofilices or a Pteridosperm, Kidston^ and others think the latter the more probable. We, however, agree with Johnson^ that there is absolutely no evidence that this very completely known type (at any rate in the case of A. hibernica) bore seeds. It is much more probably a Primofilix. The evidence of Rhacopteris, so far as it goes, agrees with this conclusion. On the other hand at least one Adiantit Stock Photo](https://c8.alamy.com/comp/RCTB2Y/devonian-floras-a-study-of-the-origin-of-cormophyta-paleobotany-devonian-vi-pteropsida-81-several-attempts-have-been-recently-made-to-determine-whether-archaeopteris-was-a-member-of-the-primofilices-or-a-pteridosperm-kidston-and-others-think-the-latter-the-more-probable-we-however-agree-with-johnson-that-there-is-absolutely-no-evidence-that-this-very-completely-known-type-at-any-rate-in-the-case-of-a-hibernica-bore-seeds-it-is-much-more-probably-a-primofilix-the-evidence-of-rhacopteris-so-far-as-it-goes-agrees-with-this-conclusion-on-the-other-hand-at-least-one-adiantit-RCTB2Y.jpg ". Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI] PTEROPSIDA 81. Several attempts have been recently made to determine whether Archaeopteris was a member of the Primofilices or a Pteridosperm, Kidston^ and others think the latter the more probable. We, however, agree with Johnson^ that there is absolutely no evidence that this very completely known type (at any rate in the case of A. hibernica) bore seeds. It is much more probably a Primofilix. The evidence of Rhacopteris, so far as it goes, agrees with this conclusion. On the other hand at least one Adiantit Stock Photo")
RMRCTB2Y–. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI] PTEROPSIDA 81. Several attempts have been recently made to determine whether Archaeopteris was a member of the Primofilices or a Pteridosperm, Kidston^ and others think the latter the more probable. We, however, agree with Johnson^ that there is absolutely no evidence that this very completely known type (at any rate in the case of A. hibernica) bore seeds. It is much more probably a Primofilix. The evidence of Rhacopteris, so far as it goes, agrees with this conclusion. On the other hand at least one Adiantit
RMRCTB2D–. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI PTEROPSIDA 83 we have something different in the way of a fructification to anything known among Carboniferous plants. On the other hand, that of the Psilophytic genus Broggeria (Fig. 17, p. 35) has at least some superficial resemblance to that of Cephalopteris. In both cases these fructifications may well arise from the metamorphosis of a tuft of finely divided branclilets, and may. Fig. 47. Aphlebiae oi Pecopleris (Dacfy- loiheca) plutnosa, (Art.), from the Coal Measures, showing persistence of thalloid fohag
![. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI] PTEROPSIDA 79 is first the Archaeopteris type of leaf. This arose from the meta- morphosis of the branches of the nth. order in a system which was at least bipinnate, if not more compound still. Each alternate branchlet was flattened out either into a sterile wedge- shaped leaf, with a radiating nervation, or metamorphosed into one or more sporangia. Every stage is clearly seen in Devonian species of Archaeopteris (Figs. 28-31, pp. 56-59). Further modifications of the wedge-shaped entire, primitive type of lea Stock Photo](https://c8.alamy.com/comp/RCTB3R/devonian-floras-a-study-of-the-origin-of-cormophyta-paleobotany-devonian-vi-pteropsida-79-is-first-the-archaeopteris-type-of-leaf-this-arose-from-the-meta-morphosis-of-the-branches-of-the-nth-order-in-a-system-which-was-at-least-bipinnate-if-not-more-compound-still-each-alternate-branchlet-was-flattened-out-either-into-a-sterile-wedge-shaped-leaf-with-a-radiating-nervation-or-metamorphosed-into-one-or-more-sporangia-every-stage-is-clearly-seen-in-devonian-species-of-archaeopteris-figs-28-31-pp-56-59-further-modifications-of-the-wedge-shaped-entire-primitive-type-of-lea-RCTB3R.jpg ". Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI] PTEROPSIDA 79 is first the Archaeopteris type of leaf. This arose from the meta- morphosis of the branches of the nth. order in a system which was at least bipinnate, if not more compound still. Each alternate branchlet was flattened out either into a sterile wedge- shaped leaf, with a radiating nervation, or metamorphosed into one or more sporangia. Every stage is clearly seen in Devonian species of Archaeopteris (Figs. 28-31, pp. 56-59). Further modifications of the wedge-shaped entire, primitive type of lea Stock Photo")
RMRCTB3R–. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. VI] PTEROPSIDA 79 is first the Archaeopteris type of leaf. This arose from the meta- morphosis of the branches of the nth. order in a system which was at least bipinnate, if not more compound still. Each alternate branchlet was flattened out either into a sterile wedge- shaped leaf, with a radiating nervation, or metamorphosed into one or more sporangia. Every stage is clearly seen in Devonian species of Archaeopteris (Figs. 28-31, pp. 56-59). Further modifications of the wedge-shaped entire, primitive type of lea
RMRCTB6T–. Devonian floras; a study of the origin of Cormophyta. Paleobotany -- Devonian. vj ARCHAEOPTERIS Pteropsida. 59 Archaeopteris, Dawson, 1871^ (Figs. 28-32). Fronds of large size, bipinnate with a stipiilar base, stipules in pairs, adnatc, and a ranicntum on the lower part of the petiole. Sterile pinnules typi- cally obo'ate or ovatc-cuneate, entire ortoothed, with a flabellate. Fig. .31. Ardtaeoplerisfissilis, Schmalli., from tlic Upper Devonian of EUes- mereland. (Nat. size except fig. marked 9, which is x|.) After Nathorst (1904). 1 See Carruthers (1872); Kidston (1888); Nathorst (1902) and
Search Results for Pteropsida Stock Photos and Images (42)
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