Thanks GdeS for his Recherches sur les végétaux fossiles [1876].
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Thanks GdeS for his Recherches sur les végétaux fossiles [1876].
Hopes GdeS will publish on subjects discussed in his letter [10587]. CD had noted similar persistence of variation in fossil shells.
Calls his attention to Nägeli’s work on Hieracium.
Expresses skepticism about O. Heer’s view that dicotyledonous plants developed suddenly. Believes they must have developed slowly in some part of the globe completely isolated from other regions.
Such honours as proposal for election to Institut affect CD very little.
GdeS’s idea that dicotyledonous plants were not developed until sucking insects evolved is a splendid one. The suggestion that fertilisation of the surviving members of the most ancient dicotyledons should be studied is a good one. CD hopes GdeS will keep it in mind.
It would be false to pretend he cares very much about his election to the Institut.
Glad to hear GdeS plans to publish a work on the more ancient fossil plants. Hopes he will report also on the more recent Tertiary forms because the close gradation of such forms is "a fact of paramount importance for the principle of evolution".
Thanks for GdeS’s Le monde des plantes [1879].
CD has just read "Végétation polaire" [C. R. Congr. Int. Sci. Geogr. 1 (1878): 197–242] with interest. Hooker gave it conspicuous place in his Royal Society Address (1878).
Thanks GdeS for his photograph; sends his own. Glad to hear GdeS’s work [Le monde des plantes (1879)] is popular in France.
Responds to GdeS’s comments on Descent [see 8246]. Cannot give up belief in close relationship of man to higher Simiae.
Thanks GdeS for his "Études sur la végétation" [Ann. Sci. Nat. (Bot.) 5th ser. 15 (1872): 277–315]. "Nothing can be more important … than your evidence of the extremely slow and gradual manner in which specific forms change."
Hopes GdeS will shed light on whether polymorphic forms like Rubus and Hieracium are generating new species at present; CD doubts this.