RECORD: Darwin, C. R. 1864-1865. Conclusions - Pure Primrose from unions of 1865. CUL-DAR110.A7. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 1.2023. RN1

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


[7]

Conclusions. Pure Primrose, from union of 1865 & few in 64.—

Long-styled

21 fl. were fert. Homo. & produced 14 pods, maximum & minimum on average 52.2 seed per capsule. (N.B. I think great contrast with Cowslips see Cowslip-Polyanthus M.S. notes for do for Oxlip paper)

These plants set spont. under net several pods, & 12 were collected which yielded 12.7 seed per pod. see Back

(Also I think contrast with Cowslip. see published paper for Oxlip paper

12 fl. were fert. Hetero. & produced 11/12 pods yielding 66.9 seed per pod. (Two yielded 77 & several 66 & 65)

(Is this not greater number than Cowslip?)

(one plant sickened)

Short-styled

18 fl were fert. Homo. & produced 7 pods yielding on average 18.8 seed, but as as 3 pods had only 6 & 5 seed each, probably 28.7 is fairer average.

Eleven pods spontaneously set yielded on average 5.6 seed.

8 fl were fert. Hetero & yielded 7/8 pods, containing on average 65.0 seed per pod.— The number of pods too small for fair average for do I not show in Primula paper that short-styled is more prolific than long-styled.

Illegitimate & Specific Difference Old M.S. used for my Paper Linn Soc

[7v]

[calculations not transcribed]

Primrose

Oxlips

I 1866 I examined some more spontaneously produced capsules under net of Primrose

Fertility of Spontaneously fertilised flower under net

[data 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 31 August, 2023