RECORD: Darwin, C. R. [1879?].12.08. Oxalis (various). CUL-DAR209.9.48. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 7.2022. 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-DAR209.9 contains materials for Darwin's book Movement in plants (1880).


[48]

For [illeg] M.S. on Seedlings—

(2) Give account of extreme circumnutation & rapidity of movement of Cots. of Oxalis sensitiva— which rise at night vertically.

(1) O. floribunda fall at night like those of rosea & colorata say [purchased] seeds — Murray once told me hardly distinct from O. rosea— perhaps not rightly named.—

(Certainly different species) (under sleep of Plants)

(3) O. corniculata give rather fuller account but no tracing

(4) short account of O. tropæoloides; rises angle of the cotyledons when viewed casually do not seem to rise at all at night, but when examined more carefully, they were found to rise from 5° to 15°.— (of Cotyledons) Also Sleep of Cot Chapter.

O. Colorata all a mistake no such species & a weed.

Oxalis articulata from Kew— 1 seedling with Cots vertically downwards well developed joint 10° P.m. Dec. 8th on previous noon Cots almost horizontal.

[sketches] (This come under Sleep)

Oxalis sensitiva (observed by Frank) in Hot-House (Temp 22 1/2— 24 1/2 C.) in [illeg] movement of unparalleled rapidity & amplitudes, But no tracing was made; many many angles measured: I will give a few of more striking cases: one a Cot. rose 70° in 11';

another cot on a distnct seedling fell 80° in 12'─

Immediately before before Preceding the

(another for 75° in 1° 9' if introduced at all here)

(had risen from a vertically downward to a vertically upward position in 1° 58'. This is not only So that this Cot. had passed through 180° within this time, & in under 2 hours. We have seen met with in no other instance of a circumnutating movement of such great amplitude as 180° or of such rapidity of move as to [few words illeg] of 80° in 12'. [illeg]

(Used)

[48v]

Oxalis


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

File last updated 25 September, 2022