The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 14
... specimens vermicular lines , which I believe to be tubes of Eozoon penetrated by matter once bituminous , but now in the state of graphite . * " Geology of Canada , " 1863 . When paleozoic land - plants have been converted into graphite ...
... specimens vermicular lines , which I believe to be tubes of Eozoon penetrated by matter once bituminous , but now in the state of graphite . * " Geology of Canada , " 1863 . When paleozoic land - plants have been converted into graphite ...
Pagina 15
... specimens from the coal - formation . * No structures so perfect have as yet been detected in the Laurentian , though in the largest of the three graphitic beds at St. John there appear to be fibrous structures , which I believe may ...
... specimens from the coal - formation . * No structures so perfect have as yet been detected in the Laurentian , though in the largest of the three graphitic beds at St. John there appear to be fibrous structures , which I believe may ...
Pagina 16
... of Gaspé , when he met the late Professor Agassiz , and remarked that the specimen was the re- mains of a Devonian tree contemporaneous with his fishes of that age . " How I wish I 16 THE GEOLOGICAL HISTORY OF PLANTS .
... of Gaspé , when he met the late Professor Agassiz , and remarked that the specimen was the re- mains of a Devonian tree contemporaneous with his fishes of that age . " How I wish I 16 THE GEOLOGICAL HISTORY OF PLANTS .
Pagina 18
... specimens of Laurentian plants showing their structure . In any case we have here presented to us the strange and startling fact that the remarkable arrangement of protoplasmic matter and chlorophyll , which enables the vegetable cell ...
... specimens of Laurentian plants showing their structure . In any case we have here presented to us the strange and startling fact that the remarkable arrangement of protoplasmic matter and chlorophyll , which enables the vegetable cell ...
Pagina 20
... specimens from Sweden , and from rocks of similar age in Canada , I confess that I have no faith in their vegetable nature . The oldest plants known to me , and likely to have been of higher grade than Alga , are specimens kindly ...
... specimens from Sweden , and from rocks of similar age in Canada , I confess that I have no faith in their vegetable nature . The oldest plants known to me , and likely to have been of higher grade than Alga , are specimens kindly ...
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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