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1860-1869 in date 
Leighton, W. A. in correspondent 
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From:
Charles Robert Darwin
To:
William Allport Leighton
Date:
26 Nov [1862]
Source of text:
Milton D. Forsyth, Jr (private collection)
Summary:

For his work on dimorphism, CD asks WAL if he can send roots of two forms of Epilobium angustifolium. He doubts that they are reciprocally connected like the two forms of Primula, but will try the experiment.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Allport Leighton
Date:
4 Dec [1862]
Source of text:
Unknown dealer
Summary:

Apologises for the trouble he has caused over his enquiries about strawberries. Describes the problems he and Emma have had with Verbascum.

Contributor:
Darwin Correspondence Project
From:
William Allport Leighton
To:
Charles Robert Darwin
Date:
[before 21 June 1863]
Source of text:
DAR 108: 180
Summary:

His observations of varieties of Verbascum.

Reference to Abbé Correa in the Life of Sir J. E. Smith.

Contributor:
Darwin Correspondence Project
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From:
William Allport Leighton
To:
Charles Robert Darwin
Date:
29 May 1865
Source of text:
DAR 76: B95–6
Summary:

Describes the floral structure of the lupin and gives his observations on its pollination by bees.

Contributor:
Darwin Correspondence Project
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