To Charles Turner [1 April – 16 June 1863?]
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].
Author: | Charles Robert Darwin |
Addressee: | Charles Turner |
Date: | [1 Apr – 16 June 1863?] |
Classmark: | DAR 96: 12 |
Letter no: | DCP-LETT-3886 |
From Richard Trevor Clarke [April? 1863]
Summary
Encloses strawberry blossoms used in his crossing experiments.
Author: | Richard Trevor Clarke |
Addressee: | Charles Robert Darwin |
Date: | [Apr? 1863] |
Classmark: | DAR 161: 164 |
Letter no: | DCP-LETT-4070 |
From James Anderson 1 April 1863
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.
Author: | James Anderson |
Addressee: | Charles Robert Darwin |
Date: | 1 Apr 1863 |
Classmark: | DAR 159: 59 |
Letter no: | DCP-LETT-4071 |
From Arthur Rawson 1 April [1863]
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.
Author: | Arthur Rawson |
Addressee: | Charles Robert Darwin |
Date: | 1 Apr [1863] |
Classmark: | DAR 176: 22 |
Letter no: | DCP-LETT-4072 |
From John Scott [1–11] April [1863]
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.
Author: | John Scott |
Addressee: | Charles Robert Darwin |
Date: | [1–11] Apr [1863] |
Classmark: | DAR 108: 183, DAR 177: 86 (fragile) |
Letter no: | DCP-LETT-4073 |
letter | (5) |
Anderson, James (c) | (1) |
Clarke, R. T. | (1) |
Darwin, C. R. | (1) |
Rawson, Arthur | (1) |
Scott, John | (1) |
Darwin, C. R. | (4) |
Turner, Charles | (1) |
Darwin, C. R. | (5) |
Anderson, James (c) | (1) |
Clarke, R. T. | (1) |
Rawson, Arthur | (1) |
Scott, John | (1) |