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The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
[Outline sketches of pollen from long- and short-styled yellow cowslips and from red cowslip, magnified 350x.]
Writes of dimorphic plants.
Thanks WED for measuring cowslip pollen. Sends dimorphic flowers.
Experiment instructions.
Diagrams of short- and long-styled Pulmonaria under magnification.
Observations on style length of 150 flowers of Pulmonaria [angustifolia]. [See Forms of flowers, p. 105.]
Instructions on measuring pollen of dimorphic plants.
Discusses WED’s observations on polymorphic flowers.
CD says Meneanthes is now in flower.
CD would like to see Rhamnus, as an American species is dimorphic.
Sends red cowslip pollen to be measured.
Sends Pulmonaria anthers, with measurements of styles and pollen counts.
Sends specimens of Menyanthes with observations and drawings [see Forms of flowers, p. 115].
Mentions WED’s extraordinary discovery of some pollen-grains of different sizes. The observations must be followed up.
[Outline sketches of pollen from long- and short-styled yellow cowslips and from a red cowslip.]
CD much obliged for specimen and drawings.
Clarifies his letter of 18 May [4500].
Encloses drawings of Menyanthes and Pulmonaria anthers.
Doesn't think will be able to find Buckthorn. Sends reference from Revue de Deux Mondes. Is settled at the Bank.
[Outline sketches of pollen from short-styled yellow primrose and from long-styled yellow and red primroses.]
Sends camera outlines of pollen. Thinks the red longstyled ones are more sterile than the yellow.