From:
Charles Robert Darwin
To:
Francis Darwin
Date:
25 July [1878]
Source of text:
DAR 211: 40
Summary:
Is forwarding the writing machine to Carl Semper.
Is glad FD has taken up his old friends, the twiners.
Hopes to get heliotropic aerial roots from J. D. Hooker. Asks FD to find out whether any moulds or roots are apheliotropic. Is puzzled by heliotropism in subterranean roots.
Contributor:
Darwin Correspondence Project