Thanks for explanation on relative fertility of homostyled and heterostyled crosses in Primula. Sends an intermediate form with small stamens, but stigma only slightly above stamens.
Election as Botanical Lecturer at St Bartholomew's Hospital.
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Many thanks for your letter. I have got the Botanische Zeitung from
the Linn: Soc: & mean to get a friend to translate it to me. It is a bother
I am glad to say the Governors of St. Bartholomew's Hospital have withdrawn their restriction & have elected me their Botanical Lecturer at last! So I begin my duties in May.—
Thanks for explanation about Primula. I see that
homo ( 5 ): Hetero ( 14 )
( 6 ) ( 11 )—
Have you ever noticed a sort of intermediate form? viz: stamens low down, but stigma only slightly above them, with the Corolla generally larger? as in enclosed.—
- f1 5044.f1The date is established by the reference to Henslow 1866a (see n. 3, below).
- f2 5044.f2Letter to George Henslow, 16 April .
- f3 5044.f3See letter to George Henslow, 16 April  and n. 2. Henslow discussed Friedrich Hildebrand's article on pollination mechanisms in Indigofera and other plants (Hildebrand 1866a) in his paper read at the Linnean Society on 19 April 1866 (Henslow 1866a).
- f4 5044.f4Henslow may refer to the requirement that members of staff of St Bartholomew's Hospital serve a medical apprenticeship (see Medvei and Thornton eds. 1974, p. 265).
- f5 5044.f5CD's explanation has not been found; see, however, the letter from George Henslow, 7 April 1866 and n. 5. Henslow refers to CD's calculations of the weight of seeds in pods of Primula veris in `Dimorphic condition in Primula'.
- f6 5044.f6The figures are taken from table II in `Dimorphic condition in Primula', p. 89, and show, in the first and second columns, respectively, the number of `good pods' produced in homomorphic and heteromorphic crosses of Primula veris. The upper row shows the results for long-styled flowers, and the lower row for short-styled (Collected papers 2: 56).
- f7 5044.f7In addition to the long-styled and short-styled forms of Primula sinensis, CD had been experimenting with `equal-styled' specimens since 1862. CD concluded that these specimens were variations of the long-styled form, and not a third, distinct form. See Correspondence vol. 10 and `Illegitimate offspring of dimorphic and trimorphic plants', pp. 414--18. His notes are in DAR 108: 29, 38v., 56--66, 85--7, 134--5. He also carried out experiments with an equal-styled variety of P. veris that had been described by John Scott (see Correspondence vol. 11, letter to John Scott, 1 and 3 August  and n. 13). See also `Illegitimate offspring of dimorphic and trimorphic plants', pp. 426--30, Forms of flowers, pp. 234--8, and Variation 2: 109 n. See also Correspondence vol. 12.