RECORD: Darwin, C. R. 1878.06.18-19. Oxalis valdiviana / Draft of Cross and self fertilisation. CUL-DAR209.4.321-322. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 9.2022. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR209.4 contains for Darwin's book Movement in plants (1880).
Draft of Cross and self fertilisation in the hand of Ebenezer Norman with corrections by Darwin.
"Norman, Ebenezer, 1835/6-1923. 1854- Schoolmaster at Down and from 1856 and many years thereafter copyist for CD. 1856 Aug. 17 First payment for copying in CD's Account book (Down House MS). Many thereafter. CCD6:444. 1857 CD to Hooker, "I am employing a laboriously careful Schoolmaster". CCD6:443. 1858 CD to Hooker, "I can get the Down schoolmaster to do it [i.e. transcribe] on my return". CCD7:130. 1871 Banker's clerk in Deptford." (Paul van Helvert & John van Wyhe, Darwin: A Companion, 2021)
[321]
Oxalis Valdiviana
18th
[figure pasted on]
[321v]
36 647
Chap. E 10
of insects which frequent them (a) those which are visited by Diptera and by the other orders, often differing in colour.
Not only do the bright colours of flowers serve to attract insects, but there are often dark-coloured streaks and marks pointing to the nectary are often present, which Sprengel long ago maintained served as guides to the nectary.
These marks follow the veins or line in the petals, or lie between them. They may occur on only in the one, or on all excepting one or two or more of either the upper or lower petals; or on all the petals except one, or on all; or they may form a dark ring round the tubular part of the corolla, or be confined to the tips lips of an irregular flower.
In the white varieties of many flowers, such as of Digitalis purpurea, Antirrhinum majis, several species of Dianthus and Phlox, Myosotis, Rhododendron, Pelargonium, Primula and Petunia, the marks generally persist, whilst the rest of the corolla has become of a pure white; but this may be due to merely to their colour
[Cross and self fertilisation, p. 372: "There is also reason to believe, and this was the opinion of Sprengel, that flowers differ in colour in accordance with the kinds of insects which frequent them.
Not only do the bright colours of flowers serve to attract insects, but dark-coloured streaks and marks are often present, which Sprengel long ago maintained served as guides to the nectary. These marks follow the veins in the petals, or lie between them. They may occur on only one, or on all excepting one or more of the upper or lower petals; or they may form a dark ring round the tubular part of the corolla, or be confined to the lips of an irregular flower. In the white varieties of many flowers, such as of Digitalis purpurea, Antirrhinum majus, several species of Dianthus, Phlox, Myosotis, Rhododendron, Pelargonium, Primula and Petunia, the marks generally persist, whilst the rest of the corolla has become of a pure white; but this may be due merely to their colour being more intense and thus less readily obliterated."]
[322]
Ox. Valdiviana
(Fig 14 13z.)
June 19th
(Copied by Frank)
(Reduced to 1/2 scale same lettering)
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 7 December, 2022