From:
Asa Gray
To:
Charles Robert Darwin
Date:
4 Aug 1862
Source of text:
DAR 110 (ser. 2): 67–9
Summary:
Gives J. T. Rothrock’s observations on the structure and fertility of the two forms of Houstonia. Mentions his own observations on Rhexia virginica and Gymnadenia tridentata.
Contributor:
Darwin Correspondence Project
