RECORD: Darwin, C. R. 1863.05.15-1863.07.20. Pelargoniums. CUL-DAR51.B14-B15. 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. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin.


[B14]

Pelargonium. May 15 1863

Climax by pollen of peloric Etna Black Thread This has dropped off

June 4th Two single black Threads have been tied on by mistake; they show peloric of Agnes.

Jun 8th Climax by Peloric of Etna 2 flowers Black & White Threads

Climax by common pollen of Etna White Thread.

May 23 white thread 24th white Thread

May 22d. Climax by peloric of Q. of Scarlets (1) Double Black Th.

23d. ― by Common pollen of Q. of Scarlets (1) Double White thread

26th Three double black threads

 --- Two double white threads

30th Two Double Black Threads

Jun 1. Two double White Threads

May 28. Peloric of Topsy Black worsted

-- 29 Common of Topsy White wool.

June 3d. do.  Black W.

- do white W.

[B14v]

In some of the Q. of Scarlets the peloric tendency has spread from central flower to all flowers on Umbels - same plant!

The Peloric flower always opens before the others –

Results July 10' 1863. Of the 32 flowers fertilised (see foot of opposite paper) only 3 produced any seed, & only one seed in each capsule. So can judge nothing. These 3 seeds were produced by pollen of Topsy; one by peloric & two by pollen of common flower; & only 2 of each kinds were used. Can judge nothing.

[B15]

May 29' Peloric of Aspasia 2 fl. Black & Red Wool.

- Common p. of do 2 fl. Whit & Red W.

June 1' Peloric of Agnes - 1 Black the & Red Wool

- common of Agnes 1 white Th. & Red Wool.

Jun 4 2 flowers by Peloric of Agnes; each with single Black thread.

- 7th 1 black & Red wool. Peloric

- 10. 2 flowers common White thread & Red. Wool

Jun 10. 17 Peloric pollen.}

 15 [total] 32 common pollen} 5 vars nearly equal number of each all on Climax good seeder

[B15v]

June 28' The seedling Peloric by Peloric, has central fl. peloric strictly & anthers very short & utterly contabescent so has one common surrounding flower - fertilised one & peloric with pollen of also many seedlings (Q. of S by multiflora which seeds well). Marked Peloric with black thread.

In a fresh flower one anther contained pollen.

(July 5th in fresh non-peloric flowers on same truss plenty of pollen; fertilised with it, a flower of white Pelargonium. - Marked whit thread & this has produced pod and one good seed so apparently good pollen.)

July 7th Another truss has opened & central flower is only partially peloric & has short nectary & pollen: I have fertilised it with pollen of B & marked black thread. Two flowers; only 1 produced 1 good seed.

July 8th The seedling plant from peloric flower of (B) Q. of scarlet by pollen of Multiflora Alba, has now flowered. The central fl is peloric with tendency to be double & has pollen. July 20 The seedling from peloric, has produced 2 flowers on same truss - nearly peloric but not quite , very different from own pollen are marked whit thread, but did not produce any good seed.


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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 23 July, 2023