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Notes on the anatomy of some silicified ferns from the cretaceous of Germany

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Proceedings / Indian Academy of Sciences

Summary and Conclusions

A re-examination of the type specimens and slides of some silicified fern stems from the Cretaceous of Germany revealed the following new points.

  1. (1)

    P. Cotai Corda.

  2. (a)

    The basal ioop of the leaf-trace is plicate; this feature strengthens the Cyatheaceous affinity of the plant already suspected on other grounds.

  3. (b)

    The layer called by Corda “innere Bastscheide” occurs on both sides of the stele in a position corresponding to that of a pericycle and is here interpreted as such.

  4. (c)

    An attempt has been made to explain the manner in which the large number of roots found their way into the pith.

  5. (2)

    Caulopleris Brownii Renault. The presence of an endodermis showing Casparian thickenings at places is demonstrated and the building up of the leaf-trace elucidated.

  6. (3)

    The structure ofRhizodendron oppoliense Goeppert andProtopteris fibrosa Stenzel has been compared in detail and found to agree very closely except for a few differences which are enumerated in the text.

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Authors and Affiliations

  1. Demonstrator in Botany, University of Lucknow, Lucknow, India

    A. R. Rao

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  1. A. R. Rao
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(Communicated by Prof. B. Sahni,d.sc., sc. d., f.a.s.b., f.g.s., Lucknow.)

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Rao, A.R. Notes on the anatomy of some silicified ferns from the cretaceous of Germany. Proc. Indian Acad. Sci. 1, 219–228 (1934). https://doi.org/10.1007/BF03049347

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  • DOI: https://doi.org/10.1007/BF03049347

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