RECORD: Darwin, C. R. n.d. Laws of Length...Hottonia. CUL-DAR111.B12. 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: 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-DAR111 contains notes on illegitimate progeny of dimorphic and trimorphic plants for Darwin's book Forms of flowers (1877).


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Laws of Length

Lythrum & Oxalis

Holds good with some Primulæ (?)

(Hottonia, Distance between stigma & anthers greater in short-styled than in long-styled, yet short-styled much more fertile with own pollen 100 to 71 (opposed to rule)

Pulmonaria Angust ? in long-styled distance Distance of between stigma & anther greater than in short-styled as 100 to 69. & long-styled with own pollen much to most sterile true rule

Linum grandiflorum opposed to rule for distance much less in long-styled

Primula vulgaris distance between stigma & anther greater (in 100 to 93) in short-styled than in long-styled & short-styled more sterile. True rule.

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With Hottonia pollen more apt to be placed on stigma of long-styled & this much from pollen. less sterile (opposed to rule)

With Linum grandiflorum, pollen always placed on long-styled stigma & [illeg] barren. (to rule)

In Primula apt to fall on stigma of short-styled & more barren (true rule)

Pulmonaria angustifolia — more apt to fall on short-styled stigma & far more fertile.— (opposed to rule)

Lythrum & Oxalis conform to rule (opposed to rule) →


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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 2 June, 2023