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From Asa Gray [27 and 29 August] and 2 September [1861]
Summary
Gives some observations on the sensitivity of Drosera species and comments on cases of "dioecio-dimorphism".
| Author: | Asa Gray |
| Addressee: | Charles Robert Darwin |
| Date: | 27 and 29 Aug 1861 and 2 Sept 1861 |
| Classmark: | DAR 110 (ser. 2): 76 |
| Letter no: | DCP-LETT-3242 |
From Asa Gray 11 October 1861
Summary
Notes several cases of "dioecio-dimorphism" in different genera; feels the discovery of pollen that will act only on the pistil of another flower is most important. Believes CD should next turn his attention to investigating cases of "precocious fertilisation".
| Author: | Asa Gray |
| Addressee: | Charles Robert Darwin |
| Date: | 11 Oct 1861 |
| Classmark: | DAR 109: 82–3, DAR 110 (ser. 2): 117, DAR 111: 83 |
| Letter no: | DCP-LETT-3282 |
From Asa Gray 9 November 1861
Summary
Discusses observations of his own and of John Torrey on dimorphism, especially in Amsinckia.
Is trying to find specimens of Houstonia for CD.
| Author: | Asa Gray |
| Addressee: | Charles Robert Darwin |
| Date: | 9 Nov 1861 |
| Classmark: | DAR 110 (ser. 2): 63–4 |
| Letter no: | DCP-LETT-3313 |
From Asa Gray 31 December 1861
Summary
Discusses dimorphism and suggests CD investigate Valeriana.
Praises CD’s views with respect to the U. S. Civil War and relations with England. Worsening relations between Britain and U. S.
| Author: | Asa Gray |
| Addressee: | Charles Robert Darwin |
| Date: | 31 Dec 1861 |
| Classmark: | DAR 110 (ser. 2): 65, DAR 165: 104–105 |
| Letter no: | DCP-LETT-3354 |
