• Corpus ID: 39664444

The Anatomy and Affinities of Medullosa noei Steidtmann, and Associated Foliage, Roots, and Seeds

@inproceedings{Steidtmann1944TheAA,
  title={The Anatomy and Affinities of Medullosa noei Steidtmann, and Associated Foliage, Roots, and Seeds},
  author={Waldo Edward Steidtmann},
  year={1944}
}

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The petrified remains of a stem, roots, leaves, leaf bases, and petioles of the Pteridosperm, Medullosa were found in association, but structural characteristics indicate a rather definite relationship.
Structure of Seedlike Fructifications Found in Coal Balls from Harrisburg, Illinois
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An environmental theory, emphasizing the conditions under which each was fossilized, is proposed to account for the close relationship between the casts found in the shales above the coal seams and the petrified ovules of the coal balls imbedded in the coal layers.
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