RECORD: Darwin, C. R. 1868.05-06. Buck-wheat Fagopyrum esculentum. CUL-DAR79.140-141. 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 volumes CUL-DAR 76-79 contain material for Darwin's book Cross and self fertilisation (1876).


(102

Buckwheat Fagopyrum. esculentum à Keep for Dimorph & note of illegitimate U

(May 10th. 68. In both Pots the Legitimate plants are rather taller & finer than the illegitimate: now 6 or 8 inches high (?))

(May 24 In all three Pots the legitimate or crossed plants flowered from 1 to 2 days before the selfs or illegitimates)

May 24'

Pot. I From Longstyled illegitimate plants — 4 long-styled & 1 short-styled

II. do 1 [do] 1 [do]} count all & then add to below

Pot I from Short-styled illegitimate plant — 3 long -styled — count together all

Big Pot illegit. pants from long-styled. — spont self-fert

long-styled 20 + 20 + 4

Short-styled 2 + 0 + 1 (Offspring)

Big Pot. illegit. plant from short-styled spont self-fert

long-styled. 8 + 3 + 6 + 4 = 13 complete number

Short-styled — 8 + 11 + 1 = 20 complete number.

(June 3d

Pot I Plants from short-styled, now in full flower

5 Plants from the Legitimate cross, together, measured 16 ft, 6 inches in length — average.

5 plants from the self-fertilised or illegitimate union together measured only 11 ft. 3 inches in length. average.

The tallest plant in whole pot was one of the Legitimate plants

[102v]

[calculations not transcribed]

(103

Buckwheat

Pot I. plants from Long-styled

six crossed Plants measured 19 ft. 2 in

six self ― [do] 12. 8

Pot. II. plants from Long-styled

4 crossed Plants measured 11. 11

4 self-plants ― 8. 9

In all 3 Pots 15 crossed & 15 selfs. were matched — In each Pot the tallest plant was on crossed side & in most case each plant taller than its pair.

Altogether we have, as total length of the 15 Plants

[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 31 May, 2023