The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. 1861.08.11. William has been examining some Salvia. CUL-DAR49.63. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 1.2022. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Chapter 3 refers to chapter III of Natural selection "on possibility of all organisms crossing: on susceptibility of reproduction to change".

Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR49 contains notes for Natural selection chap. 3 on 'On...organic beings occasionally crossing' or dichogamy.

[63]

Aug. 11 /61/ Torquay. William has been examining some Salvia 2 stamens rudimentary, near filament - Two of an extraordinary structure short oblique giving rise by large bow shaped connection, with one cell of anther at one end, & rudiment of other cell at (b) -The part (b) of both stamens united for long space & stretching obliquely across & filling up tube of corolla.

Part (b) slope so bee easily depresses & that brings (a) out of hood of corolla - Stigma expand at apex. By this insert little axle of hinge at (Z) rotate, & by its elasticity the stamen is brought under hood again. The filament & connection hinged together allowing

Ch. III

[63v]

a certain amount of movement, & there are gaps on each side to keep movement vertical

What abortion & modification from insect!

A large yellow bush-like Salvia acted in same way by hood of corolla being pushed by Bee from lip.

Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)