RECORD: Darwin, C. R. 1864.07.02. Oxalis speciosa / Wool long-styled / Thread short-styled [number of seeds]. CUL-DAR109.B25. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and John van Wyhe, edited by John van Wyhe 11.2022. RN2

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).


[B25]

Oxalis speciosa July 2' 64

Wool long-styled

 

Thread. short-styled

Black, own Homomorphic

White Heteromorphic

Black own pollen Homomorphic

White Heteromorphic

none tried

1—(one produced fine capsule) [+] 1

1 [+] 1 [+] 1 [+] 1 [+] 1 [+] 1. very many flowers also naturally produced, & none set ←none set

1 [+] 1 [+] 1 [+] 1 [+] 1 [+] 1 [+] 1 none set many [illegible]

 

July 30th by pollen of longest anther

 

July 30th by pollen of

shortest anther of long-styled.

 

 

 

 

1 [+] 1 [+] 1 /2 of these produced seed so that altogether 3/5 produced seed. 2 seed

 

1 [+] 1 [+] 1 [+] 1 [+] 1 } two of these produced seed.

 

 

 

1 [+] 1 — (Black thread pollen of longer stamens of long styled.) not one produced seed

 

 

Plants unhealthy especially during second set of experiment

— (Better neglect the whole of this as useless)

(see over)

[B25v]

Pollen of long-styled plainly smaller—

{2 sets of anthers closely together & corresponding with short stigmas

But from which anthers?? (not stated)

Long-styled — pollen 12-13/7000; of short-styled 16-17/7000 ie as 3 to 4 in diameter.

In long-styled the 2 sets of anthers stand much more closely together than in short-styled, in which they stand further apart; the stigma of long-styled on level only with upper anthers.

On the other hand stigma of short-styled nearly on level with both sets of anthers of long-styled.


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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 26 December, 2025