The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 50
... rounded , translucent granules , which may be escaped spores ( microspores ) . " The bed containing these spores at Kettle Point was stated , in the reports of the Geological Survey of Canada , " to be twelve or fourteen feet in ...
... rounded , translucent granules , which may be escaped spores ( microspores ) . " The bed containing these spores at Kettle Point was stated , in the reports of the Geological Survey of Canada , " to be twelve or fourteen feet in ...
Pagina 53
... rounded Sporangites like those obtained in the Erian of Ohio , and of which specimens had been sent to me some years be- fore by the late Prof. Hartt . But they differed in show- ing the remarkable fact that these rounded bodies are ...
... rounded Sporangites like those obtained in the Erian of Ohio , and of which specimens had been sent to me some years be- fore by the late Prof. Hartt . But they differed in show- ing the remarkable fact that these rounded bodies are ...
Pagina 54
... rounded edges , their ordinary diameter being from one seventy - fifth to one one hundredth of an inch , though they vary considerably in size . This , how- ever , I do not regard as an essential character . The edges , as seen in ...
... rounded edges , their ordinary diameter being from one seventy - fifth to one one hundredth of an inch , though they vary considerably in size . This , how- ever , I do not regard as an essential character . The edges , as seen in ...
Pagina 63
... rounded sporocarps . They are found abun- dantly in the Middle Erian of the State of New York , and also occur in Scotland , while one species appears to occur in Nova Scotia , as high as the Lower Carboniferous ( Figs . 17 , 18 ) ...
... rounded sporocarps . They are found abun- dantly in the Middle Erian of the State of New York , and also occur in Scotland , while one species appears to occur in Nova Scotia , as high as the Lower Carboniferous ( Figs . 17 , 18 ) ...
Pagina 66
... rounded prominences , possibly the impressions of the spores within . This peculiar and very simple style C A Y B FIG . 21. - Lepidodendron and Psilophyton ( Erian , New Brunswick ) . △ , Lepidodendron Gaspianum . B , C , Psilophyton ...
... rounded prominences , possibly the impressions of the spores within . This peculiar and very simple style C A Y B FIG . 21. - Lepidodendron and Psilophyton ( Erian , New Brunswick ) . △ , Lepidodendron Gaspianum . B , C , Psilophyton ...
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Termeni și expresii frecvente
abundant Acrogens aërial roots Algæ allied America animal appear arctic areoles bark beds belong bituminous branches Brongniart Calamites Canada carbon Carboniferous Caulopteris cellular character clay climate coal coal-formation conifers Cordaites cycads Dadoxylon Dawson deposits described Devonian diameter dicotyledonous Eocene Europe exogenous fact ferns flora formation forms fossil fossil plants fronds fructification fruit Gaspé genera genus Geological Society graphite Greenland gymnospermous Heer hemisphere Journal known land land-plants Laramie Laurentian leaf-bases leaf-scars leaves Lepidodendron Lepidophloios Lesquereux limestone Lower Carboniferous Lycopods macrospores matter medullary rays Mesozoic Miocene modern Nematophyton northern Nova Scotia occur outer Palæozoic period Permian pines pinnules pith present preserved probably Prof Psilophyton referred remarkable resemble Rhizocarps rocks sandstones scalariform scars Sequoia shales Sigillaria Silurian similar species specimens Sphenophyllum Sporangites spore-cases spores sporocarps stems Sternbergia structure surface Tertiary thick tion tissue tree-ferns trees trunks types Upper Cretaceous vascular vegetable wood woody