From:
Charles Wright
To:
Asa Gray
Date:
20, 25 and 26 Mar 1864 and 1 Apr 1864
Source of text:
DAR 181: 163
Summary:
Describes the flower and mode of action of a particular orchid.
Has been examining Spiranthes and is experimenting to see whether insects are necessary for its fertilisation.
It seems that Oncidium is designed so as not to be fertilised.
Contributor:
Darwin Correspondence Project