The Geological History of Plants
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) Under this name we may provisionally include those rounded spherical bodies found in the coal and its accompanying beds, and also in the Erian, which may be regarded as Macrospores or Sporo- carps of Protosalvinia, or other Rhizocarpean plants akin to those de- scribed above in Chapter III, which see for description.
Genus PROTOSALVINIA. Under this we include sporocarps allied to those of Salvinia, as described in Chapter III.
Family FILICES.
Under this head I shall merely refer to a few grou...ps of special interest, and to the provisional arrangement adopted for the fronds of ferns when destitute of fructification.
172 THE GEOLOGICAL HISTORY OF PLANTS.
The external appearances of trunks of tree-ferns have been al- ready referred to.
With respect to tree ferns, the oldest known examples are those from the Middle Devonian of New York and Ohio, which I have de- scribed in the "Journal of the Geological Society, " 1871 and 1881. As these are of some interest, I have reproduced their descriptions in a note appended to Chapter III, which see.
What to read after The Geological History of Plants?
You can find similar books in the "Read Also" column, or choose other free books by John William Dawson to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
) Under this name we may provisionally include those rounded spherical bodies found in the coal and its accompanying beds, and also in the Erian, which may be regarded as Macrospores or Sporo- carps of Protosalvinia, or other Rhizocarpean plants akin to those de- scribed above in Chapter III, which see for description.
Genus PROTOSALVINIA. Under this we include sporocarps allied to those of Salvinia, as described in Chapter III.
Family FILICES.
Under this head I shall merely refer to a few grou...ps of special interest, and to the provisional arrangement adopted for the fronds of ferns when destitute of fructification.
172 THE GEOLOGICAL HISTORY OF PLANTS.
The external appearances of trunks of tree-ferns have been al- ready referred to.
With respect to tree ferns, the oldest known examples are those from the Middle Devonian of New York and Ohio, which I have de- scribed in the "Journal of the Geological Society, " 1871 and 1881. As these are of some interest, I have reproduced their descriptions in a note appended to Chapter III, which see.
What to read after The Geological History of Plants?
You can find similar books in the "Read Also" column, or choose other free books by John William Dawson to read onlineMoreLess
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