The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 24
... 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 , cylin- drical tubes , traversed by a complex network of ...
... 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 , cylin- drical tubes , traversed by a complex network of ...
Pagina 25
... bark , like the Lepidodendron of later periods , to be noticed in the sequel . Dr. Hicks has also described from the same series of beds which afforded the fragments of Nematophyton certain carbonised dichotomous stems , which he has ...
... bark , like the Lepidodendron of later periods , to be noticed in the sequel . Dr. Hicks has also described from the same series of beds which afforded the fragments of Nematophyton certain carbonised dichotomous stems , which he has ...
Pagina 43
... bark . Whatever cortical layer was present was in all probability a modification of the general structure . + " 3 ... bark , which seems to me to indicate the same dense cellular structure seen in the bark of Lepidodendra , etc. + ...
... bark . Whatever cortical layer was present was in all probability a modification of the general structure . + " 3 ... bark , which seems to me to indicate the same dense cellular structure seen in the bark of Lepidodendra , etc. + ...
Pagina 44
... containing Nematophyton , and must , I think , have been an exudation from its bark . * " Journal Geol . Society of London , " 1863 , 1881 . CHAPTER III . THE ERIAN OR DEVONIAN FORESTS - ORIGIN 44 THE GEOLOGICAL HISTORY OF PLANTS .
... containing Nematophyton , and must , I think , have been an exudation from its bark . * " Journal Geol . Society of London , " 1863 , 1881 . CHAPTER III . THE ERIAN OR DEVONIAN FORESTS - ORIGIN 44 THE GEOLOGICAL HISTORY OF PLANTS .
Pagina 62
... bark . * Renault and Williamson have more recently obtained more perfect specimens , and the former has figured a remarkably complex triangular axis , containing punctate and barred vessels , and larger punctate vessels filling in its ...
... bark . * Renault and Williamson have more recently obtained more perfect specimens , and the former has figured a remarkably complex triangular axis , containing punctate and barred vessels , and larger punctate vessels filling in its ...
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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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