The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 7
... remarkable fact that in earlier times low groups attain to an elevation unexampled in later times , when their places are occu- pied with plants of higher type . It is this historical development that we have to trace in the following ...
... remarkable fact that in earlier times low groups attain to an elevation unexampled in later times , when their places are occu- pied with plants of higher type . It is this historical development that we have to trace in the following ...
Pagina 18
... remarkable arrangement of protoplasmic matter and chlorophyll , which enables the vegetable cell to perform , with the aid of solar light , the miracle of decomposing carbon dioxide and water , and forming with them woody and corky ...
... remarkable arrangement of protoplasmic matter and chlorophyll , which enables the vegetable cell to perform , with the aid of solar light , the miracle of decomposing carbon dioxide and water , and forming with them woody and corky ...
Pagina 19
... remarkable that , in ascending from the Lauren- tian , we do not at first appear to advance in evidences of plant - life . The Huronian age , which succeeded the Laurentian , seems to have been a disturbed and unquiet time , and ...
... remarkable that , in ascending from the Lauren- tian , we do not at first appear to advance in evidences of plant - life . The Huronian age , which succeeded the Laurentian , seems to have been a disturbed and unquiet time , and ...
Pagina 20
... remarkable is the discovery in the same beds of a stem with rhombic areoles or leaf - bases , to which the name Protostigma has been given . If a plant , this may * " Geological Magazine , " 1869 . See figure in next chapter ...
... remarkable is the discovery in the same beds of a stem with rhombic areoles or leaf - bases , to which the name Protostigma has been given . If a plant , this may * " Geological Magazine , " 1869 . See figure in next chapter ...
Pagina 38
... remarkable Cauda - Galli fucoids , re- ferred by Hall to the genus Spirophyton , and which are characteristic of the oldest Erian beds . The specimens which I have seen from New York , from Gaspé , and from Brazil , leave no doubt in my ...
... remarkable Cauda - Galli fucoids , re- ferred by Hall to the genus Spirophyton , and which are characteristic of the oldest Erian beds . The specimens which I have seen from New York , from Gaspé , and from Brazil , leave no doubt in my ...
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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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