From:
Joseph Dalton Hooker
To:
Charles Robert Darwin
Date:
[early Dec 1856]
Source of text:
DAR 100: 149
Summary:
Podostemaceae flowering under water.
Contributor:
Darwin Correspondence Project
From:
George Dickie
To:
Charles Robert Darwin
Date:
1 Dec 1856
Source of text:
DAR 207: 16
Summary:
His observations on Subularia: has never seen it in flower in the air.
Contributor:
Darwin Correspondence Project
From:
George Bentham
To:
Charles Robert Darwin
Date:
2 Dec [1856]
Source of text:
DAR 111: A75–6
Summary:
Cites cases of leguminous plants whose cleistogamic flowers produce more seed than perfect flowers. [See Forms of flowers, p. 326.]
Contributor:
Darwin Correspondence Project
From:
Joseph Dalton Hooker
To:
Charles Robert Darwin
Date:
7 Dec 1856
Source of text:
DAR 100: 113–14
Summary:
Has done New Zealand flora calculations. Results support CD’s theory of necessity of crossing. Trees tend to have separate sexes.
Contributor:
Darwin Correspondence Project
From:
James Dwight Dana
To:
Charles Robert Darwin
Date:
8 Dec 1856
Source of text:
DAR 205.9: 378
Summary:
Agassiz has informed him that the mice and rats of Mammoth Cave are American in type.
Alludes to CD’s doubt of the principle that "progress of life on the globe is parallel with the development in different tribes". Outlines his own ideas on the "unfolding of the type-idea" and its "parallelism with the law of development in the embryo".
Contributor:
Darwin Correspondence Project
From:
Thomas Vernon Wollaston
To:
Charles Robert Darwin
Date:
[11 or 18] Dec 1856
Source of text:
DAR 205.3: 301
Summary:
Informs CD that the "dishonest mollusks" were collected in May 1855 in Porto Santo. Describes some Madeira species. Though believing in "species" more and more, these may be "mere insular modifications".
Contributor:
Darwin Correspondence Project
From:
William Darwin Fox
To:
Charles Robert Darwin
Date:
19 Dec [1856]
Source of text:
DAR 77: 170
Summary:
Informs CD that in his experience with peas he has never found the seed to deteriorate.
Contributor:
Darwin Correspondence Project
From:
Hewett Cottrell Watson
To:
Charles Robert Darwin
Date:
[28 Dec 1856]
Source of text:
DAR 98: A15–18
Summary:
Notes on the comparative rarity of intermediate forms between species, and the varying relationships those forms may have to one or both species between which they are intermediate.
Contributor:
Darwin Correspondence Project
From:
Thomas Davidson
To:
Charles Robert Darwin
Date:
29 Dec 1856
Source of text:
DAR 162: 116
Summary:
His experience confirms CD’s view that some species and even some genera of Brachiopoda are consistently more variable than others, and that such variable forms are variable in all localities and at all periods. Similarly a species that shows a lack of variability does so at all points in time and space. Discusses the causes of variability. [See Natural selection, p. 106.]
Contributor:
Darwin Correspondence Project