To Asa Gray 24 August [1855]
Summary
"Close" species in large and small genera.
Alphonse de Candolle on geographical distribution [Géographie botanique raisonnée (1855)].
Species variability.
Author: | Charles Robert Darwin |
Addressee: | Asa Gray |
Date: | 24 Aug [1855] |
Classmark: | Archives of the Gray Herbarium, Harvard University (10) |
Letter no: | DCP-LETT-1749 |
To Asa Gray 28 July [1862]
Summary
AG’s "capital" review of Orchids [Am. J. Sci. 2d ser. 34 (1862): 138–44].
Thinks there are three forms of Lythrum salicaria.
Discusses transport of seeds by sea.
Author: | Charles Robert Darwin |
Addressee: | Asa Gray |
Date: | 28 July [1862] |
Classmark: | Gray Herbarium of Harvard University (75) |
Letter no: | DCP-LETT-3667 |
To Asa Gray 9 May [1857]
Summary
Thanks for new part of "Statistics".
Interested in disjoined species; do they tend to belong to large or small genera, and are they generally members of small families?
Is glad AG will tackle introduced plants; has noticed that the proportion of a particular family to the whole flora tends to be similar in introduced and indigenous plants.
Author: | Charles Robert Darwin |
Addressee: | Asa Gray |
Date: | 9 May [1857] |
Classmark: | Archives of the Gray Herbarium, Harvard University (9) |
Letter no: | DCP-LETT-2089 |
To Asa Gray 12 October [1856]
Summary
Thanks AG for the first part of his "Statistics [of the flora of the northern U. S.", Am. J. Sci. 2d ser. 22 (1856): 204–32; 2d ser. 23 (1857): 62–84, 369–403]
and for information on social and varying plants.
Would like to know number of genera of introduced plants in U. S.
Is surprised at some affinities of northern U. S. flora and asks for any climatic explanations.
Asks what proportion of genera common to U. S. and Europe are mundane.
Is glad AG will work out the northern ranges of the European species and the ranges of species with regard to size of genera.
Author: | Charles Robert Darwin |
Addressee: | Asa Gray |
Date: | 12 Oct [1856] |
Classmark: | Archives of the Gray Herbarium, Harvard University (6) |
Letter no: | DCP-LETT-1973 |
To Asa Gray 8 June [1855]
Summary
Suggests AG append ranges to the species in the new edition of his Manual.
Is interested in comparing the flora of U. S. with that of Britain and wishes to know the proportions to the whole of the great leading families and the numbers of species within genera. Would welcome information on which species AG considers to be "close" in the U. S.
Author: | Charles Robert Darwin |
Addressee: | Asa Gray |
Date: | 8 June [1855] |
Classmark: | Archives of the Gray Herbarium, Harvard University (2) |
Letter no: | DCP-LETT-1695 |
To Asa Gray 6 November [1862]
Summary
Agrees Max Müller’s book [see 3752] is interesting but cannot see how it will further his "cause".
A book by J. W. Colenso [The Pentateuch and book of Joshua critically examined, pt 1 (1862)] has just appeared and will "make a noise".
Would like some observations made on Cypripedium.
Will not publish yet on Lythrum as he must make many more crosses; the mid-styled is fertile with half of its own stamens.
Would like to try a few experiments on tendrils.
Author: | Charles Robert Darwin |
Addressee: | Asa Gray |
Date: | 6 Nov [1862] |
Classmark: | Gray Herbarium of Harvard University (78) |
Letter no: | DCP-LETT-3796 |
To Asa Gray 24 February [1860]
Summary
Last sheets of AG’s review of Origin have arrived. CD’s comments and criticisms.
Author: | Charles Robert Darwin |
Addressee: | Asa Gray |
Date: | 24 Feb [1860] |
Classmark: | Gray Herbarium of Harvard University (23) |
Letter no: | DCP-LETT-2713 |
To Asa Gray 2 May [1856]
Summary
Suggests affinities of the U. S. flora that he considers would be worth investigating. Wants to know the ranges of species in large and small genera.
Questions AG on naturalised plants; whether any are social in U. S. which are not so elsewhere and how variable they are compared with indigenous species. Would like to know of any differences in the variability of species at different points of their ranges and also the physical states of plants at the extremes of their ranges.
Author: | Charles Robert Darwin |
Addressee: | Asa Gray |
Date: | 2 May [1856] |
Classmark: | Archives of the Gray Herbarium, Harvard University (4) |
Letter no: | DCP-LETT-1863 |
To Asa Gray 26[–7] November [1862]
Summary
Discusses AG’s article ["Dimorphism", Am. J. Sci. 2d ser. 34 (1862): 419–20]. Does not like the terms "dioecio-dimorphism" or "precocious fertilisation". Discusses the separation of sexes in plants; cannot doubt that hermaphroditism is the aboriginal state.
Discusses AG’s observations on orchids and his review of Orchids [Am. J. Sci. 2d ser. 34 (1862): 138–51].
Author: | Charles Robert Darwin |
Addressee: | Asa Gray |
Date: | 26[–7] Nov [1862] |
Classmark: | Gray Herbarium of Harvard University (50) |
Letter no: | DCP-LETT-3830 |
To Asa Gray 29 November [1857]
Summary
Thanks AG for his criticisms of CD’s views; finds it difficult to avoid using the term "natural selection" as an agent.
Discusses crossing in Fumaria and barnacles.
Has received a naturally crossed kidney bean in which the seed-coat has been affected by the pollen of the fertilising plant.
Finds the rule of large genera having most varieties holds good and regards it as most important for his "principle of divergence".
Author: | Charles Robert Darwin |
Addressee: | Asa Gray |
Date: | 29 Nov [1857] |
Classmark: | Archives of the Gray Herbarium, Harvard University (18) |
Letter no: | DCP-LETT-2176 |
Matches: 1 hit
- … J. D. Hooker, 25 September [1853] . CD may have spoken to John Phillips at the meeting of the Philosophical Club of the Royal Society on 19 November 1857 at which both were present (Royal Society Philosophical Club minutes). Gray had already provided CD with a list of ‘close species’ (see Correspondence vol. 5, letter to Asa Gray, 8 June [1855] , …