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From:
Charles Robert Darwin
To:
Daniel Oliver
Date:
[12 Apr 1863]
Source of text:
DAR 261.10: 46 (EH 88206029)
Summary:

Working on monstrous Primula. Is ovule anatropous as Asa Gray says, or amphitropous? Does he know natural path of pollen tubes in Primula. Can the tube enter the ovule by the chalaza?

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
John Scott
Date:
12 Apr [1863]
Source of text:
DAR 93: B59, B77–8
Summary:

Encourages JS to publish on sterility of orchids and to experiment on Passiflora.

Doubted Hooker’s poppy case.

Describes case of primrose with three pistils: when pulled apart allowed pollen to be placed directly on ovules. This supports JS’s explanation of H. Crüger’s case.

Contributor:
Darwin Correspondence Project
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