RECORD: Darwin, C. R. n.d. Genera with 5 species & upwards. CUL-DAR16.205. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 3.2023. 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 volume CUL-DAR16 contains calculations and tables for Darwin's 'big book' Natural Selection F1583.
Boreau, Alexandre. 1840. Flore du centre de la France; ou description des plantes qui croissent spontanément dans la région centrale de la France, et de celles qui y sont cultivées en grand, avec l'analyse des genres et des espèces. 2 vols. in 1. Paris: Roret.
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Boreau Centre du France
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Omitting cultivated plants & the 4 genera, there are 1420 species of which 311 are very common = 219/1000
(This makes me put no confidence in foregoing results; it does not seem that C.C. do occur more in the larger genera.—)
1420 total species [-] 189 total species presenting vars [=] 1231 — total species not presenting vars.
233 — C.C. & not having vars /1231 total species not having vars = 189/1000
311 total species marked C.C [-] 78 species C.C. & having vars [=] 233 C.C. not having vars
78 species C.C. & having vars /189 species having vars = 412/100
/over
[12v]
or we may say of the total 1420 species 311 are C.C. = 311/1420 = 219/1000
Whereas of the 189 species, having vars, 78 are C.C. or very common = 78/189 = 412/1000
This clearly shows that the very common species most often present varieties — or the most variable species are most common.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 7 September, 2023