The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 7
... Lycopods and Mare's - tails predominate , and are associated with pines . Succeeding these we have a reign of Gym- nosperms , and in the later formations we find the higher Phænogams dominant . Thus there is an advance in elevation and ...
... Lycopods and Mare's - tails predominate , and are associated with pines . Succeeding these we have a reign of Gym- nosperms , and in the later formations we find the higher Phænogams dominant . Thus there is an advance in elevation and ...
Pagina 52
... Lycopods . Since the publication of my paper on Rhizocarps in the Paleozoic period above referred to , I have received two papers from Mr. Edward Wethered , F. G. S. , in one of which he describes spores of plants found in the lower ...
... Lycopods . Since the publication of my paper on Rhizocarps in the Paleozoic period above referred to , I have received two papers from Mr. Edward Wethered , F. G. S. , in one of which he describes spores of plants found in the lower ...
Pagina 64
... Lycopods . It is so named from its resem- blance , in some re- spects , to the curi- ous parasitic Lycopods placed in the modern genus Psilotum . Sev- éral species have been described , and they are eminently characteris- tic of the ...
... Lycopods . It is so named from its resem- blance , in some re- spects , to the curi- ous parasitic Lycopods placed in the modern genus Psilotum . Sev- éral species have been described , and they are eminently characteris- tic of the ...
Pagina 69
... Lycopods , the club - mosses or ground - pines , which in Canada and the Eastern States carpet the ground in many parts of our woods , and are so available for the winter decoration of our houses and public buildings . If we fancy one ...
... Lycopods , the club - mosses or ground - pines , which in Canada and the Eastern States carpet the ground in many parts of our woods , and are so available for the winter decoration of our houses and public buildings . If we fancy one ...
Pagina 70
... Lycopod there is a central axis of such barred vessels associated with simpler fibres or elongated cells . Even ... Lycopods of the Erian age a more complex structure is introduced . The barred ves- sels were expanded in the first ...
... Lycopod there is a central axis of such barred vessels associated with simpler fibres or elongated cells . Even ... Lycopods of the Erian age a more complex structure is introduced . The barred ves- sels were expanded in the first ...
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Termeni și expresii frecvente
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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