The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 45
... flora has been somewhat rapid , and it may be interesting to note its principal stages , as an encouragement to the hope that we may yet learn something more satisfactory re- specting the older floras we have just discussed . In ...
... flora has been somewhat rapid , and it may be interesting to note its principal stages , as an encouragement to the hope that we may yet learn something more satisfactory re- specting the older floras we have just discussed . In ...
Pagina 48
... * Or , as they have recently been named by some botanis rosporous Filices , " though they are certainly not ferns in an sense of that term . flora , which I was then preparing , and which 48 THE GEOLOGICAL HISTORY OF PLAN.
... * Or , as they have recently been named by some botanis rosporous Filices , " though they are certainly not ferns in an sense of that term . flora , which I was then preparing , and which 48 THE GEOLOGICAL HISTORY OF PLAN.
Pagina 67
... on " Devonian Plants , " " Geological Survey of Canada , " which see for details as to Erian Flora of northeastern America . many palæo - botanists have referred to the Marsiliacæ , THE ERIAN OR DEVONIAN FORESTS . 67.
... on " Devonian Plants , " " Geological Survey of Canada , " which see for details as to Erian Flora of northeastern America . many palæo - botanists have referred to the Marsiliacæ , THE ERIAN OR DEVONIAN FORESTS . 67.
Pagina 83
... flora when we have studied that of the succeeding Carboniferous . We may merely remark here on the fact that , in these forests of the Devonian and in the marshes on their margins , we find a wonder- ful expansion of the now modest ...
... flora when we have studied that of the succeeding Carboniferous . We may merely remark here on the fact that , in these forests of the Devonian and in the marshes on their margins , we find a wonder- ful expansion of the now modest ...
Pagina 84
... Flora of Canada , " 1871. - Macrospores , in the form of discs or globes , smooth and thick - walled , the walls pene- trated by minute radiating pores . Diameter about one one - hun- dredth of an inch , or a little more , When in situ ...
... Flora of Canada , " 1871. - Macrospores , in the form of discs or globes , smooth and thick - walled , the walls pene- trated by minute radiating pores . Diameter about one one - hun- dredth of an inch , or a little more , When in situ ...
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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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