From:
Asa Gray
To:
Charles Robert Darwin
Date:
1 June 1857
Source of text:
DAR 8: 47bA
Summary:
Comments on species with disjoined ranges; does not feel, despite CD’s expectations, that they tend to belong to small families.
Gives the proportion of U. S. trees in which the sexes are separate [see Natural selection, p. 62].
Contributor:
Darwin Correspondence Project
