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XVI.—Quantitative Evolution. III. Dp-ages of Gramineæ

Published online by Cambridge University Press:  15 September 2014

James Small
James Small
Affiliation:
Department of Botany, Queen's University, Belfast
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Extract

Applying Udny Yule's formulæ (1924) to the Compositæ, Small (1937) found that the average ages in doubling periods (Dp-ages) of the tribes of Compositæ, when plotted against a time-scale, gave points on an exponential curve called the BAT curve. If this curve is characteristic of average families of Angiosperms it should be possible to place the Dp-ages of tribes within other families on this curve as plotted against geological time, and thus obtain an order of geological origin which is quite independent of actual fossil records and which can be checked against any facts known concerning the evolutionary history of the family.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 57 , 1938 , pp. 221 - 227
Copyright
Copyright © Royal Society of Edinburgh 1938

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References

References to Literature

Bews, J. W., 1929. The World's Grasses.Google Scholar
Schuchert, C., and Dunbar, C. O., 1933. Textbook of Geology, vol. ii.Google Scholar
Small, J., 1935. “Quantitative Evolution,” Rep. Brit. Assoc., pp. 444–445.Google Scholar
Small, J., 1938. “Quantitative Evolution. II. Compositæ Dp-ages in Relation to Time,” Proc. Roy. Soc. Edin., vol. lvii, pp. 215–220 (preceding paper).CrossRefGoogle Scholar
Small, J., and Johnston, I. K., 1938. “Quantitative Evolution in Compositæ,” Proc. Roy. Soc. Edin., vol. lvii, pp. 26–54.CrossRefGoogle Scholar
Udny Yule, G., 1924. “A Mathematical Theory of Evolution,” Phil. Trans. Roy. Soc., vol. ccxiii, B, p. 21.Google Scholar
Willis, J. C., 1922. Age and Area, C.U.P.Google Scholar