Now believes flowers of Fumariaceae must be self-fertilised.
Planning a piece on dimorphism in the Natural History Review ["On the two forms, or dimorphic condition, in the species of Primula … by Charles Darwin", n.s. 2 (1862): 235–43].
Observations on Campanula dimorphism.
My dear Sir.
It is very atrocious of me to trouble you espec
< > common one & I saw a few days ago that the insects had bored a hole at x thus getting at the nectar without disturbing the anthers which instead fit very closely under the stigma x x x
They wished me to notice your case of Primula dimorphism in Nat. Hist. Review
& I thought of giving a short acct. of some cases of the
phenomenon so far as we know anything ab
I have made within the last few days a rather interesting obs. on dimorphous Campanula. I wished to allude to the case of the order (mentioned by Hooker & Thomson. Journ. Linn Soc. ii. p. 7 & previously by Linnæus in Praelectiones (of C. perfoliata))—& examined some of the smaller flowers. I find them thus,—
[DIAG HERE] No Corolla, no
No—style or stigma,—but with ovary & numerous
x is a hairy mammilla sticking slightly up in middle of disk Dissecting further I found the disc membrane double in the middle the interspace enclosing a stigma-like body:—thus—
In the minute flowers,—(size of coriandras to pea), it was at first difficult to understand, but I now find that the stigma-like body enclosed by imperforate membrane—is both stigma & anthers. Looking down upon it after dissecting away upper membrane I find it, in the large flowers 5-lobed—with slender rays from the tips of the lobes to base of each calyx-lobe thus—
the ends of the rays are attached.— Further examining & comparison
By the way I think I c
Yours very Sincerely | D
- f1 3502.f1CD had been unwell following his recent trip to London to read a paper before the Linnean Society (see letter to J. D. Hooker, 9 [April 1862] and n. 5).
- f2 3502.f2CD and Oliver had corresponded the previous year about the pollination mechanisms of Fumariaceae (see Correspondence vol. 9, letter to Daniel Oliver, 9 April ).
- f3 3502.f3[Oliver] 1862c. CD made several annotations on the review in his copy of this issue of the Natural History Review, which is preserved in the Darwin Library--CUL.
- f4 3502.f4Oliver refers to Joseph Dalton Hooker and John Lubbock. CD read his paper, `Dimorphic condition in Primula' before the Linnean Society of London on 21 November 1861 (see Correspondence vol. 9).
- f5 3502.f5CD's paper does not describe differences in the size of the ovules of the long- and short-styled forms of Primula, but CD included Oliver's observations on this point when he revised the paper for inclusion in Forms of flowers (see Forms of flowers, p. 17). See also letter to Daniel Oliver, 12 [April 1862].
- f6 3502.f6Hooker and Thomson 1858.
- f7 3502.f7Linnaeus 1792.
- f8 3502.f8In addition to his duties at the Royal Botanic Gardens, Kew, Oliver was professor of botany at University College London.
- f9 3502.f9The person to whom Oliver refers has not been identified; Primula farinosa, the bird's-eye primrose, is common in damp woods in northern England and southern Scotland. CD had requested specimens of this species from Oliver the previous season, but Oliver had been unable to send any (see Correspondence vol. 9, letters to Daniel Oliver, 1 May , 27 May , and 11 September ).
- f10 3502.f10See letter to Daniel Oliver, 12 [April 1862] and n. 4.
- f11 3502.f11See letter to Daniel Oliver, 12 [April 1862].