The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 6
... cells in their composition , and thus have th attaining a more considerable magnitude . Ferns ( Filices ) , the Mare's - tails ( Equisetac Club - mosses ( Lycopodiacea ) , and a curious of aquatic plants called Rhizocarps ( Rhizoca The ...
... cells in their composition , and thus have th attaining a more considerable magnitude . Ferns ( Filices ) , the Mare's - tails ( Equisetac Club - mosses ( Lycopodiacea ) , and a curious of aquatic plants called Rhizocarps ( Rhizoca The ...
Pagina 14
... cells of corals have been penetrated by minous matter , forming what may be regarded injections , sometimes of much beauty . In cor with this , while in some Laurentian graphitic for instance , in the compact graphite of Cla carbon ...
... cells of corals have been penetrated by minous matter , forming what may be regarded injections , sometimes of much beauty . In cor with this , while in some Laurentian graphitic for instance , in the compact graphite of Cla carbon ...
Pagina 15
... cell - wa has been converted into graphite , while their caviti have been filled with calcareous spar and quartz , t finest structures being preserved quite as well as in co paratively unaltered specimens from the coal - formation No ...
... cell - wa has been converted into graphite , while their caviti have been filled with calcareous spar and quartz , t finest structures being preserved quite as well as in co paratively unaltered specimens from the coal - formation No ...
Pagina 18
... cell to perform , with the aid of solar light , the miracle of decomposing carbon dioxide and water , and forming with them woody and corky tissues , had already been introduced upon the earth . It has been well said that no amount of ...
... cell to perform , with the aid of solar light , the miracle of decomposing carbon dioxide and water , and forming with them woody and corky tissues , had already been introduced upon the earth . It has been well said that no amount of ...
Pagina 43
... cells may be a little more tortuous , and a transverse film of coaly matter extends from the outer coaly envelope inwardly . This may perhaps be caused by some accident of preservation . The outer coaly layer shows tubes similar to ...
... cells may be a little more tortuous , and a transverse film of coaly matter extends from the outer coaly envelope inwardly . This may perhaps be caused by some accident of preservation . The outer coaly layer shows tubes similar to ...
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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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