The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 7
... type . It is this historical development that we have to trace in the following pages , and it will be the most simple and at the same time the most instructive method to consider it in the order of time . CHAPTER II . VEGETATION OF THE ...
... type . It is this historical development that we have to trace in the following pages , and it will be the most simple and at the same time the most instructive method to consider it in the order of time . CHAPTER II . VEGETATION OF THE ...
Pagina 9
... types of marine animals . Where animal life is , we may fairly infer the existence of vegetable life as well , since the plant is the only producer of food for the ani- mal . But we are not left merely to this inference . Great ...
... types of marine animals . Where animal life is , we may fairly infer the existence of vegetable life as well , since the plant is the only producer of food for the ani- mal . But we are not left merely to this inference . Great ...
Pagina 26
... type of tree very dissimilar to any even of the later Palæozoic age , which existed through- out the Silurian , and ... types can rarely be determined . For the same reasons it has proved difficult clearly to distinguish them from mere ...
... type of tree very dissimilar to any even of the later Palæozoic age , which existed through- out the Silurian , and ... types can rarely be determined . For the same reasons it has proved difficult clearly to distinguish them from mere ...
Pagina 36
... type of distinctly carbonaceous character . It may be described as follows : Buthotrephis Grantii , S. N. ( Fig . 13 ) .- Stems and * Appendix , p . 676 , edition of 1878 . fronds smooth and slightly striate longitudinally , with curved ...
... type of distinctly carbonaceous character . It may be described as follows : Buthotrephis Grantii , S. N. ( Fig . 13 ) .- Stems and * Appendix , p . 676 , edition of 1878 . fronds smooth and slightly striate longitudinally , with curved ...
Pagina 41
... types seen in the modern acrogens and gymnosperms . " In garments green , indistinct in the twilight , They stand like Druids of old , with voices sad and prophetic . " Prophetic they truly were , as we shall find , of the more varied ...
... types seen in the modern acrogens and gymnosperms . " In garments green , indistinct in the twilight , They stand like Druids of old , with voices sad and prophetic . " Prophetic they truly were , as we shall find , of the more varied ...
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Termeni și expresii frecvente
abundant Acrogens aërial roots Algæ allied America animal appear arctic areoles bark beds belong bituminous branches Brongniart Calamites Canada carbon Carboniferous Caulopteris cellular character clay climate coal coal-formation conifers Cordaites cycads Dadoxylon Dawson deposits described Devonian diameter dicotyledonous Eocene Europe exogenous fact ferns flora formation forms fossil fossil plants fronds fructification fruit Gaspé genera genus Geological Society graphite Greenland gymnospermous Heer hemisphere Journal known land land-plants Laramie Laurentian leaf-bases leaf-scars leaves Lepidodendron Lepidophloios Lesquereux limestone Lower Carboniferous Lycopods macrospores matter medullary rays Mesozoic Miocene modern Nematophyton northern Nova Scotia occur outer Palæozoic period Permian pines pinnules pith present preserved probably Prof Psilophyton referred remarkable resemble Rhizocarps rocks sandstones scalariform scars Sequoia shales Sigillaria Silurian similar species specimens Sphenophyllum Sporangites spore-cases spores sporocarps stems Sternbergia structure surface Tertiary thick tion tissue tree-ferns trees trunks types Upper Cretaceous vascular vegetable wood woody