From:
Hewett Cottrell Watson
To:
Asa Gray
Date:
13 Mar 1857
Source of text:
DAR 181: 36
Summary:
Describes problems of classifying species in highly variable genera. Lists highly variable genera. Comments on the list of Asa Gray. Says species may be made to appear more or less variable according to whether a genus is divided into few or many species.
Contributor:
Darwin Correspondence Project