The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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... Psilophyton ( two Figures ) Sphenophyllum Lepidodendron Various Ferns . Archæopteris Caulopteris Megalopteris Calamites Asterophyllites Dadoxylon • • 21 22 , 23 28 28 • 29 · 30 • 31 . · 33 34 36 • 37 · 40 49 · • 54 62 , 63 64 , 66 • 65 ...
... Psilophyton ( two Figures ) Sphenophyllum Lepidodendron Various Ferns . Archæopteris Caulopteris Megalopteris Calamites Asterophyllites Dadoxylon • • 21 22 , 23 28 28 • 29 · 30 • 31 . · 33 34 36 • 37 · 40 49 · • 54 62 , 63 64 , 66 • 65 ...
Pagina 39
... Psilophyton . I may say in this connection that specimens of flattened Psilophyton and Arthrostig- ma , in the Upper Silurian and Erian of Gaspé , would probably have been referred to Algæ , but for the fact that in some of them the ...
... Psilophyton . I may say in this connection that specimens of flattened Psilophyton and Arthrostig- ma , in the Upper Silurian and Erian of Gaspé , would probably have been referred to Algæ , but for the fact that in some of them the ...
Pagina 40
... carbonaceous débris. FIG . 14. - Silurian vegetation restored . Protannularia , Berwynia , Nema- tophyton , Sphenophyllum , Arthrostigma , Psilophyton . raised as to the share of spores and spore -. 40 THE GEOLOGICAL HISTORY OF PLANTS .
... carbonaceous débris. FIG . 14. - Silurian vegetation restored . Protannularia , Berwynia , Nema- tophyton , Sphenophyllum , Arthrostigma , Psilophyton . raised as to the share of spores and spore -. 40 THE GEOLOGICAL HISTORY OF PLANTS .
Pagina 41
... Psilophyton and the starry Protannularia and some tall trees , perhaps looking like gigantic club- mosses , or possibly with broad , flabby leaves , mostly cellu- lar in texture , and resembling Algæ transferred to the air . Imagination ...
... Psilophyton and the starry Protannularia and some tall trees , perhaps looking like gigantic club- mosses , or possibly with broad , flabby leaves , mostly cellu- lar in texture , and resembling Algæ transferred to the air . Imagination ...
Pagina 44
... Psilophyton , Arthrostigma , and Leptophleum ; that the peculiar bodies known as Pachytheca were not unlikely its fruit - we have evidence that there were , in the early Paleozoic period , plants scarcely dreamt of by modern botany ...
... Psilophyton , Arthrostigma , and Leptophleum ; that the peculiar bodies known as Pachytheca were not unlikely its fruit - we have evidence that there were , in the early Paleozoic period , plants scarcely dreamt of by modern botany ...
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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