The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 7
... woody stems , and seeds with two seed - leaves . Most of the ordinary forest- trees of temperate climates belong to this group . On referring to the geological table , it will be seen that there is a certain rough correspondence between ...
... woody stems , and seeds with two seed - leaves . Most of the ordinary forest- trees of temperate climates belong to this group . On referring to the geological table , it will be seen that there is a certain rough correspondence between ...
Pagina 15
... woody or vascular tissues ; but it cannot with certainty be affirmed that such tissues * " Acadian Geology , " p . 535. In calcified specimens the structures remain in the graphite after decalcification by an acid . have been found . It ...
... woody or vascular tissues ; but it cannot with certainty be affirmed that such tissues * " Acadian Geology , " p . 535. In calcified specimens the structures remain in the graphite after decalcification by an acid . have been found . It ...
Pagina 18
... woody and corky tissues , had already been introduced upon the earth . It has been well said that no amount of study of inorganic nature would ever have enabled any one to anticipate the possibility of the construction of an apparatus ...
... woody and corky tissues , had already been introduced upon the earth . It has been well said that no amount of study of inorganic nature would ever have enabled any one to anticipate the possibility of the construction of an apparatus ...
Pagina 58
... woody or scalariform tissues , such as might be expected in con- nection with the débris of terrestrial acrogens , and that , on the other hand , we find them enclosed in cellular sporocarps , though in the majority of cases these have ...
... woody or scalariform tissues , such as might be expected in con- nection with the débris of terrestrial acrogens , and that , on the other hand , we find them enclosed in cellular sporocarps , though in the majority of cases these have ...
Pagina 65
... woody cells . Fruc- tification consisting of naked oval spore- cases , borne usually in pairs on slender , curved pedicels , either lateral or terminal . — This species was fully described by me in the papers referred to above , from ...
... woody cells . Fruc- tification consisting of naked oval spore- cases , borne usually in pairs on slender , curved pedicels , either lateral or terminal . — This species was fully described by me in the papers referred to above , from ...
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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