From:
Asa Gray
To:
Charles Robert Darwin
Date:
[early Aug 1856]
Source of text:
DAR 165: 93
Summary:
Believes intermediate varieties are generally less numerous in individuals than the two states that they connect.
Discusses the difficulties of deciding what is the typical form of a species
and gives some opinions on the variability of introduced species compared with indigenous species.
Contributor:
Darwin Correspondence Project
