RECORD: Darwin, C. R. [ny].10.10-18. Corydalis claviculata. CUL-DAR157.2.28. Edited by John van Wyhe (The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 5.2023. 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 volumes CUL-DAR157.1-2 contain notes, abstracts etc. for Darwin's long paper and later book Climbing plants (1865). It was also commercially available as a softbound offprint, F834, F834a. See R. B. Freeman's bibliographical introduction. Items CUL-DAR157.11-60 were in a folder marked "Twiners". Items CUL-DAR157.61-112 were in a folder marked "Leaf-climbers" and items CUL-DAR157.114-147 were in a folder marked "Tendrils".


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Corydalis claviculata

fine large irregular ellipses very narrow or rather broad, with longer axes, at nearly right-angles to each other. It made 3 ellipses in about 6°.—

The young leaf stands vertically up, whilst revolving —

Are real tendrils ever formed??

First-formed leaves have not minute leaflet with elongated petioles.

The compound leaf which has been described, bore 9 lateral petioles (lower ones compared) mostly alternate. The penultimate one A was now acted on 1/4' of gr. loop, during several days; nor was B, nor C; but then upper ones wd be acted on by stick. — D was slowly acted on by 1/8' grain in about 18.— The petiole E, in other hand was acted on in under 4° by loop 1/16' of gr, & taken off grew straight again in about same time.—

[2v]

Ought to be considered tendrils — from extreme smallness of size of most leaflets & especially from increase in length of petioles.—

I must say allude when I give my classification, one doubtful case

Oct 10' In the spec. wh G. [George Darwin] has drawn, the terminal portion of petioles of leaf-tendril, besides being elongated is thinner.— In two of the branches of at extremity, one is only under high power percept just perceptibly enlarged & the other not so — Neither of these have anything which can be called a terminal leaflet (which end in sharp point or spine) So say leaflets terminal generally from 1/50th to 1/10th in length, but sometime quite aborted — Hence class under tendrils, (& probably from bending

3

William dryed spec. grew in group. The tendrils bear 3 or so 4 reduced leaflets ─

The longest part bearing such leaflets was 1.2 of inch in length. On same specimen, one leaflet was 9/100 in length & 4/100 in breadth; & the smallest leaflet was rather shorter & only 1/50' of inch in width ─ sharply pointed ─ As stalk of leaflet was barely 1/100 of inch, little leaflet twice as broad as stalk.─ Not one tendril but whole was thus enlarged ─

The nerves in littlest leaflet branch out in both sides ─ a true leaflet.

I believe tip, when old (& so very different from Clematis), spontaneously bends downwards & inwards, so as to be hoked ─ This trace of spontaneous bending of tendrils.─

4)

Oct. 11. One leaf which had become hooked did slowly catch stick— older one could not —

= say soon lose power after hooking =

Oct 16th. 14th & 15th — Traced movement of axis in bell glass was in constant movement in very irregular ellipses & spires, directed in all directions.

One day of 10° 30' perhaps course represented 3 1/2 ellipse — if so each completed in about 1°. 30' 3°.— Movement considerable from side to side—

Oct 18' White wool true tendril— Black wool little leaves —

The true t. occasionally appear, but more generally there are minute leaves. But class with "Tendrils" because Moh's axial tendrils which wd can have no leaves.

One of narrowest leaflet 1/75' of inch in breadth & 1/12th of inch in length — Microscopical leaflets

Axis certainly not sensitive.─


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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 21 July, 2023