From:
Charles Robert Darwin
To:
George Henry Kendrick Thwaites
Date:
26 Oct [1868]
Source of text:
American Philosophical Society (Mss.B.D25.335)
Summary:
Encloses Queries about expression.
Contributor:
Darwin Correspondence Project
Encloses Queries about expression.
Delighted with mechanisms of Salvia and Viola. How can anyone who compares structure of Viola cornuta and common violet still suppose them to be separate creations?