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III.—Quantitative Evolution. V. The Free and Apparent Dp‐ages of Compositæ

Published online by Cambridge University Press:  15 September 2014

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

The average ages in doubling periods (Dp‐ages) of the tribes and subtribes of Compositæ have been collated with geological time (Small, 1937, Q.E. II), but the Dp‐ages of individual tribes and sub‐tribes show considerable variation within each of the geological periods. When plotted as Dp‐ages against a time‐scale the tribes and the sub‐tribes show rather scattered positions, and the sub‐tribes within each tribe follow rather zigzag lines instead of being points on a straight line for each tribe.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 58 , 1939 , pp. 24 - 31
Copyright
Copyright © Royal Society of Edinburgh 1939

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References

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