The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 6
... stem and leaf . These are t Lichens , and the Algæ , or sea - weeds . 2. Anogens , having stem and foliage , b lular . These are the Mosses and Liverwort 3. Acrogens , which have long tubular fil cells in their composition , and thus ...
... stem and leaf . These are t Lichens , and the Algæ , or sea - weeds . 2. Anogens , having stem and foliage , b lular . These are the Mosses and Liverwort 3. Acrogens , which have long tubular fil cells in their composition , and thus ...
Pagina 7
... stem . They are the Endogens , or inside growers , with seeds hav- ing one seed - leaf only , as the grasses and the palms ; and the Exogens , having outside - growing woody stems , and seeds with two seed - leaves . Most of the ...
... stem . They are the Endogens , or inside growers , with seeds hav- ing one seed - leaf only , as the grasses and the palms ; and the Exogens , having outside - growing woody stems , and seeds with two seed - leaves . Most of the ...
Pagina 20
... stems , with whorls of elongate and pointed leaves , resembling the genus Annularia of the coal formation . I am ... stem with rhombic areoles or leaf - bases , to which the name Protostigma has been given . If a plant , this may ...
... stems , with whorls of elongate and pointed leaves , resembling the genus Annularia of the coal formation . I am ... stem with rhombic areoles or leaf - bases , to which the name Protostigma has been given . If a plant , this may ...
Pagina 23
... stems , and the elaborate examinations kindly undertaken for me by Professor Penhallow and * FIG . 4. - Nematophyton Logani ( magnified ) . Restoration . † referred to in a note to this chapter , have induced me to modify this view ...
... stems , and the elaborate examinations kindly undertaken for me by Professor Penhallow and * FIG . 4. - Nematophyton Logani ( magnified ) . Restoration . † referred to in a note to this chapter , have induced me to modify this view ...
Pagina 24
... 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 horizontal tubes thinner walled and of smaller size . 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 horizontal tubes thinner walled and of smaller size . The ...
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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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