The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 4
... Middle Laurentian , Lower Laurentian . P It will be observed , since only the late tems of formations in this table belongs to human history , that the whole lapse of tim the table must be enormous . If we suppos period to have ...
... Middle Laurentian , Lower Laurentian . P It will be observed , since only the late tems of formations in this table belongs to human history , that the whole lapse of tim the table must be enormous . If we suppos period to have ...
Pagina 45
... Middle Devonian he gives but one species , a land - plant of the genus Lepidodendron . In the Upper Devonian the number rises to fifty - seven , of which all but seven are terrestrial plants , representing * Jena , 1860 . a large number ...
... Middle Devonian he gives but one species , a land - plant of the genus Lepidodendron . In the Upper Devonian the number rises to fifty - seven , of which all but seven are terrestrial plants , representing * Jena , 1860 . a large number ...
Pagina 47
... 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 shores . These were the conditions of the Devonshire limestones ...
... 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 shores . These were the conditions of the Devonshire limestones ...
Pagina 63
... Middle Erian of the State of New York , and also occur in Scotland , while one species appears to occur in Nova Scotia , as high as the Lower Carboniferous ( Figs . 17 , 18 ) . These organisms have been variously referred to Lyco- pods ...
... Middle Erian of the State of New York , and also occur in Scotland , while one species appears to occur in Nova Scotia , as high as the Lower Carboniferous ( Figs . 17 , 18 ) . These organisms have been variously referred to Lyco- pods ...
Pagina 68
... Middle Erian . Be- sides these , there are in the Silurian and Erian beds plants with verticillate leaves which have been placed with the Annulariæ , but which may have differed from . them in fructification . Annularia laxa , of the ...
... Middle Erian . Be- sides these , there are in the Silurian and Erian beds plants with verticillate leaves which have been placed with the Annulariæ , but which may have differed from . them in fructification . Annularia laxa , of the ...
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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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