The affinities of the Pentoxyleae

Authors

  • A.R. Rao Professor of Botany (Retd.), Lucknow University, Lucknow 226007, India

DOI:

https://doi.org/10.54991/jop.1981.1413

Keywords:

Pentoxyleae, Pteridospermales, Cycadales, Bennettitales, Ginkgoales, Coniferales (India)

Abstract

The medley of characters found in the different components of the Pentoxyleae is discussed. It is pointed out that at the present state of our knowledge of the morphology and anatomy of this group, it is not possible to refer it exclusively to any known group of plants. It is also pointed out that in view of the mixture of characters it shows, it can be only regarded as an isolated synthetic group, showing some features in common with Pteridospermales, Cycadales, Bennettitaleales, Ginkgoales, and Coniferales.

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References

Delevoryas T 1955. The Medullosae - their structure and relationships. Palaeontographica, 97B: 114-117.

Meeuse ADJ 1961. The Pentoxyleae and the origin of monocotyledons. Proc. K. ned. Akad. Wet., 60: 543-549.

Rao AR 1943. The structure and affinities of Taeniopteris spatulata McCl. Proc. natn. Acad. Sci., 13: 333-355.

Rao AR 1974. Pentoxyleae, pp. 201-209 in K. R. Surange et al. (Eds) - Aspects and Appraisal of Indian Palaeobotany. Birbal Sahni Institute of Palaeobotany, Lucknow, India.

Rao AR 1976. Problems in the Pentoxyleae. The Palaeobotanist 25: 393-396. https://doi.org/10.54991/jop.1976.1026

Sahni B 1948. The Pentoxyleae: A new group of gymnosperms from the Rajmahal Hills of India. Bot. Gaz., 110: 47-80.

Seward AC 1917. Fossil Plants, 3. Cambridge.

Stewart WN & Delevoryas T 1956. The Medullosean Pteridosperms. Bot. Rev., 22:48-80.

Vishnu-Mittre 1953. A male flower from the Pentoxyleae with remarks on the structure of the female cones of the group. The Palaeobotanist 2: 75-84. https://doi.org/10.54991/jop.1953.435

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Published

1981-12-31

How to Cite

Rao, A. (1981). The affinities of the Pentoxyleae. Journal of Palaeosciences, 28, 207–209. https://doi.org/10.54991/jop.1981.1413

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Research Articles

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