Sends flowers with anthers of two colours.
Royal Gardens Kew
4. IX. 1862
I have been looking amongst the herbaceous beds & enclose a few Lythraceae & Onagraceae which may interest you a little.
Our Lythrums—forms of L. salicaria I daresay most
of them—are going back. Lopezia (Onagr.) is a curious thing, but I
never studied its economy. I do not recollect any additional plants with 2-colored
anthers tho' I think they might be looked for amongst tetramerous genera with
8 stamens & pentam
I fancy the colour of anthers may be used by some botanists in discriminating critical species—as in Drosera rotundifolia (``white'') & D. intermedia (``yellow'').
Clarkia elegans—of which a scrap is put in may be the same with your plant.—
I am busy examin
Very sincerely yours | Dan
Chas. Darwin, Esq.
- f1 3711.f1CD was working on trimorphism in Lythrum salicaria. In the letter to Daniel Oliver, 2 September , he asked Oliver to send him fresh flowers of any of the Lythraceae, and also asked if Oliver knew the names of any plants possessing differently coloured anthers (see letter to Daniel Oliver, 2 September ). In DAR 27.2 (ser. 2): 17, there are notes, dated 5 September 1862, describing a fresh flower of Lythrum hyssopifolia from the Royal Botanic Gardens, Kew. The same sheet records notes on specimens of L. pubescens and L. acuminatum with the comment: `These are perhaps Vars. of L. salicaria.—' On 5 September, CD also recorded observations on other specimens from Kew: Cuphea lanceolata and C. ignea, which are members of the Lythraceae (DAR 109 (ser. 2): 2), and Lopezia, which belongs to the Onagraceae (DAR 205.8: 3).
- f2 3711.f2See letter to Daniel Oliver, 2 September  and n. 7. CD initially identified the specimen as Clarkia elegans, but later corrected it to C. pulchella (see DAR 48: 50).
- f3 3711.f3Joseph Dalton Hooker was preparing a monograph on the Angolan plant, Welwitschia mirabilis (J. D. Hooker 1863a; see letter from J. D. Hooker, 20 August 1862). Oliver was an assistant in the herbarium at the Royal Botanic Gardens, Kew.
- f4 3711.f4Oliver refers to the discovery of Tertiary fossil leaf-beds on the Isle of Mull by one of the tenants of George Douglas Campbell, eighth duke of Argyll (G. D. Campbell 1851). Hooker had left London for Scotland on 23 August 1862 (see letter from J. D. Hooker, 20 August 1862).
- f5 3711.f5See letter from Daniel Oliver, 13 September 1862 and n. 1.
- f6 3711.f6CD apparently intended to pay Oliver the cost of postage for the specimens that he had sent (see n. 1, above).