From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
[8 Feb 1864]
Source of text:
DAR 115: 219
Summary:
Compares Clematis and Tropaeolum with respect to touch response. Tropaeolum shows a momentary response and quick recovery. Clematis takes hours to respond, and shows no recovery.
CD can show the gradations between leaves and tendrils, but how a branch passes into a tendril utterly puzzles him.
Contributor:
Darwin Correspondence Project
