Instructions on measuring pollen of dimorphic plants.
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Instructions on measuring pollen of dimorphic plants.
Thanks WED for measuring cowslip pollen. Sends dimorphic flowers.
Experiment instructions.
Discusses WED’s observations on polymorphic flowers.
Writes of dimorphic plants.
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.]
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.]
Sends Pulmonaria anthers, with measurements of styles and pollen counts.
Sends specimens of Menyanthes with observations and drawings [see Forms of flowers, p. 115].
Clarifies his letter of 18 May [4500].
Encloses drawings of Menyanthes and Pulmonaria anthers.
CD much obliged for specimen and drawings.