The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 46
... Europe . Before describing these plants in detail , we may refer to North America for illustration of the physical condi- tions of the time . In a physical point of view the north- ern hemisphere presented a great change in the Erian ...
... Europe . Before describing these plants in detail , we may refer to North America for illustration of the physical condi- tions of the time . In a physical point of view the north- ern hemisphere presented a great change in the Erian ...
Pagina 47
... Europe presented conditions somewhat similar , in the earlier and middle portions of the period areas with insular patches of land , and later w of shallow and in part enclosed water areas , with fishes , and having an abundant vegetati ...
... Europe presented conditions somewhat similar , in the earlier and middle portions of the period areas with insular patches of land , and later w of shallow and in part enclosed water areas , with fishes , and having an abundant vegetati ...
Pagina 54
... Europe , as may b the representation of them in Fig . 16 . B AX AX DX E FIG . 16. - Sporangites ( Protosalvinia ) . △ , Sporangites Brazilie size . Ax , Same , magnified . B , Sp . biloba , natural size . macrospores . D , Spore ...
... Europe , as may b the representation of them in Fig . 16 . B AX AX DX E FIG . 16. - Sporangites ( Protosalvinia ) . △ , Sporangites Brazilie size . Ax , Same , magnified . B , Sp . biloba , natural size . macrospores . D , Spore ...
Pagina 59
... Europe perhaps presents the closest resemblance . In this plant groups of round cellular sporocarps appear at the bases of the floating fronds . They are about a line in diameter when mature , and are of two kinds , one containing ...
... Europe perhaps presents the closest resemblance . In this plant groups of round cellular sporocarps appear at the bases of the floating fronds . They are about a line in diameter when mature , and are of two kinds , one containing ...
Pagina 83
... Europe at present . The only animal inhabitants of these Devonian woods , so far as known , were a few species of insects , discovered by Hartt in New Brunswick , and described by Dr. Scud- der . Since , however , we now know that ...
... Europe at present . The only animal inhabitants of these Devonian woods , so far as known , were a few species of insects , discovered by Hartt in New Brunswick , and described by Dr. Scud- der . Since , however , we now know that ...
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acrogens aërial roots Algæ allied America appear arctic areoles bark beds belong bituminous branches Brongniart bundles Calamites Canada Carboniferous Caulopteris cells cellular character climate coal coal-formation conifers Cordaites cycads cylinder Dadoxylon Dawson Demy 8vo described Devonian diameter Eocene Erian Europe exogenous Fcap ferns flora formation forms fossil plants fronds fructification fruit Gaspé genera genus Geological Society graphite Greenland hemisphere Illustrations Journal Laramie Laurentian leaf-bases leaf-scars leaves Lepidodendron Lepidophloios Lesquereux limestone Lower Carboniferous Lycopods macrospores medullary rays Mesozoic Middle modern Nova Scotia occur outer Paleozoic period Permian petioles pines pinnate pinnules pith present probably Prof Psilophyton referred resemble Rhizocarps ribbed rocks sandstones scalariform scars Second Edition Sequoia shales Sigillaria Silurian similar Small crown 8vo species specimens Sphenophyllum Sporangites spore-cases spores sporocarps stems Sternbergia structure Tertiary thick Third Edition tion tissue tree-ferns trees trunks Upper Cretaceous vascular vegetable vols Williamson wood woody
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