The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina
... Sigillaria ( five Figures ) . Stigmaria ( two Figures ) . Vegetable Tissues Coals and Erect Trees ( two Figures ) Lepidodendron Lepidophloios . Asterophyllites , & c . . Calamites ( five Figures ) Ferns of the Coal - formation ( six ...
... Sigillaria ( five Figures ) . Stigmaria ( two Figures ) . Vegetable Tissues Coals and Erect Trees ( two Figures ) Lepidodendron Lepidophloios . Asterophyllites , & c . . Calamites ( five Figures ) Ferns of the Coal - formation ( six ...
Pagina 45
... Sigillaria , but this is of very doubtful nature . In the Middle Devonian he gives but one species , a land - plant of the genus Lepidodendron . In the Upper Devonian the number rises to fifty - seven , of which all but seven are ...
... Sigillaria , but this is of very doubtful nature . In the Middle Devonian he gives but one species , a land - plant of the genus Lepidodendron . In the Upper Devonian the number rises to fifty - seven , of which all but seven are ...
Pagina 49
... Sigillaria , Dadoxy- lon , Asterophyllites , Platyphyllum . E sequent chapter , these curious little bodies were again reviewed. raised as to the share of spores and spore - cases in the ac- cumulation of coal , a question to be ...
... Sigillaria , Dadoxy- lon , Asterophyllites , Platyphyllum . E sequent chapter , these curious little bodies were again reviewed. raised as to the share of spores and spore - cases in the ac- cumulation of coal , a question to be ...
Pagina 71
... ( Sigillaria ) , and others , again , with rounded leaf - scars , looking like the marks on Stigmaria , and belonging to the genus Cyclostigma . Thus some variety was given to the arbo- real club - mosses of these early forests . ( See ...
... ( Sigillaria ) , and others , again , with rounded leaf - scars , looking like the marks on Stigmaria , and belonging to the genus Cyclostigma . Thus some variety was given to the arbo- real club - mosses of these early forests . ( See ...
Pagina 95
... Sigillaria ( S. punctata ) in Brongniart's great work , is a true tree - fern ; and the structure of one species ( P. Cottai ) has been beautifully figuered by Corda . The species hitherto described are from the Carboniferous and ...
... Sigillaria ( S. punctata ) in Brongniart's great work , is a true tree - fern ; and the structure of one species ( P. Cottai ) has been beautifully figuered by Corda . The species hitherto described are from the Carboniferous and ...
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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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