From Daniel Oliver 4 September 1862
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.1
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 & pentams. with 10—as in the latter—Saxifrages—in former Melastæ. or Onagracæ.—
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.—2
I am busy examing. wood structure of Dr. Hooker’s Welwitschia.3 It is very curious & puzzling. I did hope to have visited Mull with Dr. H. to see the place where the Duke Argyle found the Tertiary leaf-prints, but have had to give it up,—having left too early4
Very sincerely yours | Danl. Oliver
Chas. Darwin, Esq.
Sends flowers with anthers of two colours.