From:
Asa Gray
To:
Charles Robert Darwin
Date:
[Aug 1857]
Source of text:
DAR 165: 100, 101
Summary:
States he has "misgivings about the definiteness of species". Believes there is some inherent tendency for plants to originate varieties. Cross-fertilisation is likely in most cases but sees difficulties with plants like Adlumia.
Contributor:
Darwin Correspondence Project
