RECORD: Darwin, C. R. n.d. Sida corylifolia. CUL-DAR209.14.125. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 7.2023. 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-DAR209.14 contains material for Darwin's book Movement in plants (1880).


[125]

Sida corylifolia (cordifolia in ⨀)

Seedlings 2 inches high.

On one the 2d true leaf produced .85 with petiole in length, stood at noon 9° above horizon & at 10° P.m. at 32° 28° above do & so had risen 21° only 19° [illeg]

Another 2d leaf on separate plant & rather older, being 1.4 in length with petiole stood at noon 7° above horizon & at 10° P.m 32° above horizon, so had risen 25°.

N. B when bush gets older the young leaves stand vertical. So this exactly the reverse of what usually occurs.

This little rising all the more remarkable as pulvinus on the 2d & 3d leaf moderately well developed. This uppermost ↘

[125v]

part of petiole being rather thicker & having rather smoother aspect & when section made is seen to be formed of mass of smaller cells.

These seedlings are now 2 1/2 & nearly 3 inches high & some most some of the leaves are quite vertical, & others very highly inclined.


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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 18 August, 2023