Exciting work on trimorphism in Lythrum salicaria. Requests Lythraceae from Kew.
Wants to know of plants other than Melastoma and Lythrum with coloured pollen.
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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.
Exciting work on trimorphism in Lythrum salicaria. Requests Lythraceae from Kew.
Wants to know of plants other than Melastoma and Lythrum with coloured pollen.
Performed a large number of Lythrum crosses before leaving home.
Working on Drosera for amusement. Has tried effect on plants of vegetable substances active on animal nervous systems, e.g., opium; makes Drosera inactive for hours.
Sends flowers with anthers of two colours.
Has given directions to save seeds of Lythrum hyssopifolium.
CD’s diagram of Lythrum salicaria is very remarkable. [See Collected papers 2: 107.]
Asks DO to name enclosed Lythrum received from CD’s sister-in-law [Sarah Elizabeth Wedgwood]
Discusses primrose ovules,
Atlantis paper [Nat. Hist. Rev. (1862): 149–70],
plant migrations;
Corydalis.
Requests Linum, for dimorphism study.
Reviewer of Orchids [Nat. Hist. Rev. n.s. 2 (1862): 371–6]is correct about the organisation of the book; he wonders who the reviewer is.
Has been copying out references from Natural History Review [possibly D. Oliver, "The structure of the stem in dicotyledons; being references to the literature of the subject", Nat. Hist. Rev. n.s. 2 (1862): 298–329].
Suggests DO study high incidence of separate sexes in freshwater plants.
Examined Epilobium 20 or 30 years ago at Shrewsbury. In a flash remembered it as dimorphic, but had forgotten its name.
Informs CD of possible dimorphism of Epilobium angustifolium.
Discusses the female parts of the Primula flower; the true character of the free placenta is not completely understood.
The number of "aquatic" flowers is reduced if one considers only those that expand under water.
Lecturing at Norwich.
Answers CD’s query on Primula longiflora and P. scotica.
Would like abstract of CD’s paper ["Two forms of Linum", Collected papers 2: 93–105] for Natural History Review.
Having trouble understanding laws of phyllotaxy in order to grasp Hugh Falconer’s objections.
L. C. Treviranus on Primula [see 3980] misses the "prettiness" of the adaptations.
John Scott says P. scotica is never dimorphic.
Observation on morphology of Primula ovarium sent for DO’s use.
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.
Asks DO to give enclosed [letter?] from John Scott to Hooker.
JS’s work on orchid self-sterility; Acropera has 371250 seeds in one capsule.
Wishes something could be done for Scott.
Working on monstrous Primula. Is ovule anatropous as Asa Gray says, or amphitropous? Does he know natural path of pollen tubes in Primula. Can the tube enter the ovule by the chalaza?
The ovule of Primula is amphitropous or what J. Georg Agardh calls apotropo-amphitropous [see Theoria systematis plantarum (1858), tab. 24, fig. 5–6].
Thanks for information on Primula ovules. From what DO says the pollen-tubes ought to find their way to the micropyle.