The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 20
... referred by him to the genus Sphenophyllum , † which is also allied to Rhizocarps . Still more 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 ...
... referred by him to the genus Sphenophyllum , † which is also allied to Rhizocarps . Still more 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 ...
Pagina 23
... referred to in a note to this chapter , have induced me to modify this view , and to hold that the tissues of these singular trees , which seem to have existed from the be- * " Palaeontologie des Thuringer Waldes , " 1856 . Figs . 2 , 3 ...
... referred to in a note to this chapter , have induced me to modify this view , and to hold that the tissues of these singular trees , which seem to have existed from the be- * " Palaeontologie des Thuringer Waldes , " 1856 . Figs . 2 , 3 ...
Pagina 24
... referred . They are trees of large size , with a coaly bark and large spreading roots , having the surface of the stem smooth or irregularly ribbed , but with a nodose or jointed appearance . Internally , they show a tissue of long ...
... referred . They are trees of large size , with a coaly bark and large spreading roots , having the surface of the stem smooth or irregularly ribbed , but with a nodose or jointed appearance . Internally , they show a tissue of long ...
Pagina 25
... referred to , and Claypole has described a tree from the Clinton . group of the United States , with large ovate leaf - bases , to which he has given the name Glyptodendron . † If the markings on these plants are really leaf - bases ...
... referred to , and Claypole has described a tree from the Clinton . group of the United States , with large ovate leaf - bases , to which he has given the name Glyptodendron . † If the markings on these plants are really leaf - bases ...
Pagina 26
... referred to the Algæ or sea- weeds , and indeed this group has been a sort of refuge for the destitute to which paleontologists have been accus- tomed to refer any anomalous or inexplicable form which , while probably organic , could ...
... referred to the Algæ or sea- weeds , and indeed this group has been a sort of refuge for the destitute to which paleontologists have been accus- tomed to refer any anomalous or inexplicable form which , while probably organic , could ...
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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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