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From:
Joseph Dalton Hooker
To:
Charles Robert Darwin
Date:
[25 Mar 1846]
Source of text:
DAR 104: 188–91
Summary:

JDH recognises the existence of "altered states" of continental species in island floras. The botanists’ difficulty in determining a new species is no grounds for dismissing the important question of altered forms.

Will look for Ascension plants for Ehrenberg.

French Galapagos collections confirm JDH’s view that plants arrived from north.

Cannot agree with Forbes on North Atlantic flora.

Botanical definition of "highness" and "lowness" usually means complexity and simplicity.

Some plants, such as aquatic ones, are cleistogamous. Cannot see why they should not be.

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Christian Gottfried Ehrenberg
Date:
25[–31?] Mar [1846]
Source of text:
Museum für Naturkunde Berlin (MfN/HBSB, N005 NL Christian Gottfried Ehrenberg Nr. 43 Bl. 15–17)
Summary:

Sends copy [of "Fine dust in the Atlantic Ocean", Collected papers 1: 199–202]. Attempting to obtain further samples for CGE.

Contributor:
Darwin Correspondence Project