From:
Hubert Airy
To:
Charles Robert Darwin
Date:
17 Mar 1873
Source of text:
DAR 159: 26
Summary:
Thanks for congratulations on appearance of abstract of HA’s paper [Nature 7 (1873): 343–4].
Explains again his theory of "contraction with twist" by which compact buds and a spiral phyllotaxy have evolved. Explains how the peculiar phyllotaxy of the teasel is explicable by this process of "condensation".
Contributor:
Darwin Correspondence Project
