RECORD: Darwin, C. R. [1864].07.09-10.24. Bignonia speciosa. CUL-DAR157.1.135. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 4.2023. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here.

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-DAR157.1.11-60 were in a folder marked "Twiners". Items CUL-DAR157.1.61-112 were in a folder marked "Leaf-climbers" and items CUL-DAR157.1.114-147 were in a folder marked "Tendrils". Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin.


(1

Bign. speciosa—

tips of t. pointed— reddish papilla, not hooked

Can catch after trials a thin twig, but poo loosely & rather poorly—

This plant has a habit so peculiar, but like in some respect B. capreolata, that if observed in an animal wd be unhesitatingly called an instinct.

July 9th after yesterday & today both tendrils slowly moving over face of wood, or at little distance & after crossing each other, one lower left-hand one found a pin-hole & inserted its apex, & then wonderful this t, but not opposite one stopped all movement—! as if it knew it had gained end

In every inserted by force point of lowest bent t into hole

[1v]

If 1' caught in crevice back of round stick

2d between sticks close together like basin

3d. in hole to between 2 folds of brown paper

4' in pin-hole on deal-board, but withdrew from that —

5. (July 10th) in largest hole in deal-board. spontaneously came out

6' July 11' Oak Post jarred out

7' July 13th into minute crack B

(13th evening Put 2 old crooked t. into little holes)

8th 7 July 15' other B into holes withdrew & on 16th went into crack.—

(say only that tips often do not come into contact with caught twig)

When the t. do catch twig extreme tip does not curl round—

(2

July 10th The lower t. has withdrawn from minute hole.—

― 3° P.m one t. has got into biggest hole.

July 11' put up oak Post, one t. got into small hole, but I jarred the post & it got out

(July 13th more new young to one has got into minutest minutest crack. — 15th has come out again spontaneously)

July 15 one of old pair A which I put into hole has spontaneously withdrawn.—

One of B. (same case) which inserted itself for 36° or 48° into crack has withdrawn & curled to back of post— The other B yesterday inserted itself into largish hole & now to day has withdrawn from this (11° A.m) & has gone into crack; & now 7° P.m has got out again.—

Oct 29th at last a t. which had wound round post, inserted its tip into crack, & by swelling had become firmly fix — could this ascend a barkless & fissured trunk —The fixing due to swelling of tip apparently.— I have seen go into very narrow chink before.

[135bv]

In introduct to Bignon. say at least 5 species use their tendrils in widely different manner B. venusta with its upwardly circling t, twines & uses its t. hand over hand as sailor wd say so in reversed manner t B. unguis & buxifolia —

Sept. 15' New plant— One t. has got into minute hole & has now remained 8° 30' from 12° to 5°, whilst other one has gone on moving much about.

Tip white, almost perfectly straight.— It certainly does not seem, as if insertion of tip could mechanically stop movement.— This after staying in for 20° came out & then moved about & never went into hole again.

Oct 12-14th— Again several times inserted tip (& withdrew) into holes & cracks.—

Oct. 24th new t. Two sets of t. have caught transverse thin stick.— One took round turn by middle & the extreme part then moved. The opposite one curled partially round & then moved away


Return to homepage

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

File last updated 20 July, 2023