The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 20
... genus Annularia of the coal formation . I am inclined to believe that both of Nicholson's species are parts of one plant , and for this I have proposed the generic name Protannularia ( Fig . 1 ) . Somewhat higher in the Siluro ...
... genus Annularia of the coal formation . I am inclined to believe that both of Nicholson's species are parts of one plant , and for this I have proposed the generic name Protannularia ( Fig . 1 ) . Somewhat higher in the Siluro ...
Pagina 25
... genus and Aporoxylon of Unger another . * Another question arises as to the possible relation of these plants to other trees known by their external forms . The Protostigma of Lesquereux has already been referred to , and Claypole has ...
... genus and Aporoxylon of Unger another . * Another question arises as to the possible relation of these plants to other trees known by their external forms . The Protostigma of Lesquereux has already been referred to , and Claypole has ...
Pagina 29
... genus Brachyphyllum . Nereites and Planulites are tracks and burrows of worms , with or without marks of setæ , and some of the * The name Bilobites was originally proposed by De Kay for a bivalve shell ( Conocardium ) . Its application ...
... genus Brachyphyllum . Nereites and Planulites are tracks and burrows of worms , with or without marks of setæ , and some of the * The name Bilobites was originally proposed by De Kay for a bivalve shell ( Conocardium ) . Its application ...
Pagina 35
... genus Trigonocarpum partially slickensided in this way , and which if wholly covered by this kind of marking could scarcely have been recognised . I have figured bodies of this kind in my report on the Devonian and Upper Silurian plants ...
... genus Trigonocarpum partially slickensided in this way , and which if wholly covered by this kind of marking could scarcely have been recognised . I have figured bodies of this kind in my report on the Devonian and Upper Silurian plants ...
Pagina 36
... genus Bu- thotrephis of Hall , which is characterised as having stems , sub- cylindric or com- pressed , with numer- ous branches , which are divaricating and sometimes leaf - like , contains some true Algæ . Hall's B. gracilis , from ...
... genus Bu- thotrephis of Hall , which is characterised as having stems , sub- cylindric or com- pressed , with numer- ous branches , which are divaricating and sometimes leaf - like , contains some true Algæ . Hall's B. gracilis , from ...
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Termeni și expresii frecvente
Acrogens aërial roots Algæ allied America appear Archæopteris arctic areoles bark beds belong bituminous branches Brongniart bundles Calamites Canada Carboniferous Caulopteris cellular character clay climate coal coal-formation cones conifers Cordaites cycads cylinder Dadoxylon Dawson Demy 8vo deposits described Devonian dicotyledonous Eocene Erian Europe exogenous Fcap ferns flora formation forms fossil plants fronds fructification fruit Gaspé genera genus Geological Society Greenland Heer hemisphere Illustrations land Laramie leaf-bases leaf-scars leaves Lepidodendron Lepidophloios Lesquereux limestone Lower Carboniferous Lycopods macrospores medullary rays Mesozoic Middle Miocene modern northern Nova Scotia occur outer Palæozoic period Permian pines pinnules pith present probably Prof Psilophyton referred resemble Rhizocarps ribbed rocks sandstones scalariform Sequoia shales Sigillaria Silurian similar Small crown 8vo species specimens Sphenophyllum Sphenopteris Sporangites spore-cases spores sporocarps stems Sternbergia structure Tertiary thick tion tissue transverse tree-ferns trees trunks types Upper Cretaceous vascular scar vegetable wood woody
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