RECORD: Darwin, C. R. 1862.08. Summary of crosses of Pelargonium Peloric flowers. CUL-DAR51.B13. 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.


[B13]

Aug 1862 Summary on crosses of Pelargoniums. Peloric flowers

Probable Parentage given in Cottage Gardener Midsummer 1862

Queen of Scarlet: I fertilised 4 peloric flowers with pollen of Multiflora alba, & got 3 pods, containing 4 seeds. - Also I fertilised 5 common flowers with do pollen from short anthers & or 2 pods containing one & three seeds: also 5 pod with two seeds. Hence Peloric flowers seem to be fully as fertile with pollen of Multiflora alba ,as are the common flowers.

John Bunyan. A peloric by peloric pollen of Q. of Scarlet one good? [illeg] seed a peloric by semi-peloric of Mt Et did not grow one good? seed

2 common fl. of do do one good? seed

1 common fl by peloric pollen of Q. of Scarlets 0

3 common fl. by peloric of Agnes (which is very sterile) 0.

Hence Peloric, even by peloric as fertile as common flowers.

Topsy Etna flower crossed

This very sterile for 4 flowers with own pollen set nothing & some other crosses failed; but of two common fls. fertilised by peloric of Q. of Scarlet one produced one good? seed.

Agnes, 9 crossed

very sterile, for 9 crosses with various pollen gave nothng but a semi-peloric by pollen of own common fl gave?

Etna 6 crossed.

3 common fl. by peloric pollen of Agnes & Aspasia 0

1 common fl. by common pollen of Topsy 1 good seed

of 2 peloric flowers by peloric pollen either of Agnes or Aspasia (not known which) one has one good seed.

Multiflora alba & old var like Climax set by Bees a multitude of pods; but 2 of first & 3 of last by peloric pollen of Q. of Scarlet produced 0 seeds - Hence pollen of this fertil peloric flowers not so fertile as common pollen. Yet pollen of Q. of Scarlets acted in 2 other cases viz of J. Bunyan peloric & on Common fl. of Topsy.-

I conclude that the act of crossing does good: probably peloric female organ more perfect than peloric pollen; & it seems the peloric flowers fully as fertile, or more fertile than common flowers in these sterile plants But nothng else –

We ought to compare action of peloric on peloric with common fl. with common} on same plants of Qu of Scarlets

[B13v]

Pelargoniums, peloric & other crosses

Structure of Peloric

Structure of common flowers in relation to visit of insects & of Rhododendrons


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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