Showing 41–60 of 123 items
States he has "misgivings about the definiteness of species". Believes there is some inherent tendency for plants to originate varieties. Cross-fertilisation is likely in most cases but sees difficulties with plants like Adlumia.
List of close species taken from AG’s Manual of botany [1848].
Self-fertilisation in Fumariaceae.
[CD note on bees’ visiting some members of Fumariaceae.]
Discusses arrangements for American edition of Variation.
Observations on apparently inherited instinct in a dog.
Agassiz denounces Origin as "atheistical";
AG is currently reviewing it [in Am. J. Sci. 2d ser. 29 (1860): 153–84].
Jeffries Wyman praises it, though not a convert.
American edition of Origin. AG’s assessment of the book’s weak and strong points. Suggests Jeffries Wyman would be a useful source of facts and hints for CD.
Cases of "dioecio-dimorphism" as in primroses are widespread. AG always considered them the first step toward bisexuality.
Gives some observations on the sensitivity of Drosera species and comments on cases of "dioecio-dimorphism".
Discusses observations of his own and of John Torrey on dimorphism, especially in Amsinckia.
Is trying to find specimens of Houstonia for CD.
Discusses politics in the U. S. and relations between Britain and America.
Will observe Rhexia for CD to see whether it is dimorphic.
Has been reading J. D. Morell’s new book on psychology [An introduction to mental philosophy, on the inductive method (1862)].
Progress of the Civil War.
Has received first sheets of Orchids and is very impressed. "What a skill & genius you have for these researches."
Details of U. S. orchids.
Discusses heterostyly in Houstonia.
Has not had time to look at Rhexia.
Progress of Civil War.
Discusses dimorphic plants and the occurrence of "precocious fertilisation" in the bud.
Gives some comments on design in nature in the light of the translator’s commentary in the French edition of the Origin.
Reports the recent events of the Civil War.
[Note on verso of envelope:] Utricularia vulgaris is "about as neatly contrived for cross-fertilisation by insects as almost any orchid".
Encloses stamps for Leonard Darwin.
Is observing Gymnadenia tridentata.
Has received six copies of Orchids.
Gives J. T. Rothrock’s observations on the structure and fertility of the two forms of Houstonia. Mentions his own observations on Rhexia virginica and Gymnadenia tridentata.
Notes and observations on orchids.
