Observation on morphology of Primula ovarium sent for DO’s use.
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Observation on morphology of Primula ovarium sent for DO’s use.
Enthusiastic about JS’s work on Passiflora self-incompatibility.
CD quotes JS on rostellar pollen germination [in "Fertilisation of orchids", Collected papers 2: 77–8]. H. Crüger attributes it to ants’ carrying stigmatic secretion to pollen.
Homomorphic cowslip seedlings are, sadly, showing variation.
CD’s opinion of Lyell’s Antiquity of man.
Geographical distribution during and between glacial periods.
Latent characters and reversion.
Nectar secretion in Edwardsia. Could the stamen protect stigma?
Sends monstrous Primula with three pistils.
Had never heard of Robert Caspary, but what DO thinks is the placenta could be a whorl of pistils without stigmas.
CD regrets he used "creation" in Origin when he meant "appeared".
An Oken-like article in "Owenian style" in Athenæum.
Tropical plants continue to be troublesome.
Thanks GHKT for specimens of Sethia. Discusses functions of their dimorphism for insect fertilisation.
Discusses polymorphism and fertilisation in Lythraceae.
Asks for seed of Limnanthemum.
Describes his interest in galls.
Discusses curious specimens of Gomphia and Lesemia.
Reports the observations of Hermann Crüger and John Scott that fruit is set by orchids whose flowers never open and that pollen-tubes are emitted from pollen-masses still in their proper position. These cases convince CD that in Orchids he underestimated the power of tropical orchids to produce seed without insect aid but he is not shaken in his belief that the structure of the flowers is mainly related to insect agency.
Thanks for potatoes, which may be useful in crossing.
Germination of seeds in earth on partridge’s foot.
Specimens obtained from Charles Martins will be most interesting.
Comments on QdeB’s book [Physiologie comparée (1862)].
Will send portion of copied manuscript [of Variation 2: 8–10] for WB to examine. Asks about inherited abnormalities of the eye.
Sends a sentence, quoting JP, on inherited peculiarities in eye-brows. Asks whether he may use it in his chapter on inheritance [Variation, ch. 12].