A Paleozoic Angiosperm

@article{NoAPA,
  title={A Paleozoic Angiosperm},
  author={A. C. von No{\'e}},
  journal={The Journal of Geology},
  volume={31},
  pages={344 - 347}
}
  • A. Noé
  • Published 1 May 1923
  • Geology
  • The Journal of Geology
The morphology of Paleozoic plants is based for the most part upon the microscopic examination of concretions found in English, French, and German coal seams. These concretions are calcareous in England, and siliceous in France and Germany, and contain well-preserved tissues of plants. The matrix can be cut with a diamond saw, and the sections ground to transparency. The concretions are black, round, or irregular lumps, varying in size from an English walnut to a cocoanut. They appear in the… 
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American coal-ball floras
TLDR
This brief review of American coal-ball floras points out current lines of research and what may be expected during the next decade or two to contribute notably to an understanding of the evolution of certain pteridophytic groups and the early seed plants.