From:
John Scott
To:
Charles Robert Darwin
Date:
[1–11] Apr [1863]
Source of text:
DAR 108: 183, DAR 177: 86 (fragile)
Summary:
Studying self-sterility, particularly in Oncidium, where abortion occurs consistently but stigma functions normally. His hybrid orchid crosses show sterility occurs capriciously. Thus it is not a "special endowment".
Disputes Asa Gray’s and Hermann Crüger’s view of rostellar germination.
Doubts absolute sterility of Catasetum.
Disappointed by results with homomorphic cowslips.
Contributor:
Darwin Correspondence Project