From Charles Wright to Asa Gray 20, 25, and 26 March and 1 April 1864
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.
| Author: | Charles Wright |
| Addressee: | Asa Gray |
| Date: | 20, 25 and 26 Mar 1864 and 1 Apr 1864 |
| Classmark: | DAR 181: 163 |
| Letter no: | DCP-LETT-4433 |
