From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
10 Mar 1857
Source of text:
DAR 181: 35
Summary:
HCW is trying to define what CD means by "variable" genera.
Contributor:
Darwin Correspondence Project
HCW is trying to define what CD means by "variable" genera.
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.