Search: Hooker, J. D. in author 
1840-1849::1846::02 in date 
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From:
Joseph Dalton Hooker
To:
Charles Robert Darwin
Date:
1 Feb 1846
Source of text:
DAR 100: 60–2
Summary:

Goes on the assumption that each species has one origin, is immutable, and migrates.

Disagrees with Gaudichaud[-Beaupré] that volcanic island species are polymorphous.

Some mundane genera vary, others do not (Senecio vs Gnaphalium).

John Lindley’s doctrine of longevity of trees is amazing.

Edward Forbes’s health is better.

Contributor:
Darwin Correspondence Project
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