From:
Richard Trevor Clarke
To:
Charles Robert Darwin
Date:
[Apr? 1863]
Source of text:
DAR 161: 164
Summary:
Encloses strawberry blossoms used in his crossing experiments.
Contributor:
Darwin Correspondence Project
From:
John Scott
To:
Charles Robert Darwin
Date:
[1–11] Apr [1863]
Source of text:
DAR 108: 183, DAR 177: 86 (fragile)
Summary:
Studying self-sterility, particularly in Oncidium, where abortion occurs consistently but stigma functions normally. His hybrid orchid crosses show sterility occurs capriciously. Thus it is not a "special endowment".
Disputes Asa Gray’s and Hermann Crüger’s view of rostellar germination.
Doubts absolute sterility of Catasetum.
Disappointed by results with homomorphic cowslips.
Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Charles Turner
Date:
[1 Apr – 16 June 1863?]
Source of text:
DAR 96: 12
Summary:
Asks correspondent whether, when growing hollyhocks, he finds it necessary to space out the different varieties to prevent crossing and thus to obtain true seed [see Variation 2: 108].
Contributor:
Darwin Correspondence Project
From:
James Anderson
To:
Charles Robert Darwin
Date:
1 Apr 1863
Source of text:
DAR 159: 59
Summary:
Sends CD seeds of Cattleya crispa as requested [see Collected papers 2: 77–8].
Anticipates success for his attempts to cross orchids artificially. Has not had a single seed germinate from a pod that was not produced by artificial crossing.
Contributor:
Darwin Correspondence Project
From:
Arthur Rawson
To:
Charles Robert Darwin
Date:
1 Apr [1863]
Source of text:
DAR 176: 22
Summary:
Conducted crosses on Gladiolus varieties exactly according to CD’s letter. Flowers of same variety are self-sterile, whether from the same plant or not.
Contributor:
Darwin Correspondence Project
From:
Sir Joseph Dalton Hooker
To:
Dr Thomas Anderson
Date:
1 April 1863
Source of text:
JDH/2/3/1 f.57-58, The Royal Botanic Gardens, Kew
Summary:
No summary available.
Contributor:
Hooker Project