RECORD: Darwin, C. R. 1866.05.02. Seed from a Hom. long-styled Cowslip-Poly, CUL-DAR108.117-118. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 12.2022. 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. The volumes CUL-DAR108-111 contain material for Darwin's book Forms of flowers (1877).


(1

May 2d 1866

Seed from a Hom: long-styled Cowslip-Poly fert in 1864 by Heteromorphically by pollen from short-styled Hom. Cowslip-Pol. yielded 5 plants — 3 short-styled & 2 long-styled, but one of latter with too short-pistil. Hence it is not the Homomorphic nature but not being crossed with short-styled which makes Hom. offspring from long-styled all come long-styled. —

[in margin:] This proved by Lythrum long ago.—

(Conclusion)

I also raised at same time 4 plants from ordinary Short-styled by own-form pollen & these Hom: 4 seedlings all proved to be short-styled

Red equal-styled Cowslip seed from no 37. These are grandchildren from Edinburgh plant,— 2 have flowered both red & 2 equal-styled, but pistil rather slightly variable in length.

+ 1. + 1. + 7 (but I one of these ++ though short-styled as far as stamens are concerned, has not pistil of equal length with stamens, but rises only 1/2 way up tube).

(over

[1v]

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(2

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[2v]

The pollen of 2 Plants contained a multitude of small shrivelled grains, very different from a true Heteromorphic plant which here & there contained only single shrivelled grains— Like pollen of Hybrid. — 25 flowers on 6 of these Plants fert: with own pollen, from same flower

Plants. C.

A continued + 6 long-styled (but one of these had much too short a pistil)

[Data and calculations not transcribed]


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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 July, 2023