RECORD: Darwin, C. R. [1872-1877]. Abstract of Dyer, Dimorphism in Hypericineæ. CUL-DAR110.B3b. 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.


[3b]

Cratoxylon Formosum (Bent & Hook) — Journal of Bot 1872 p 26

Aristid

Dyer — points out that it seems dimorphic; + and it is a tree differing in this [illeg] from mort dimorphic plants.

Hypericineæ

[Forms of flowers, p. 123: "Mr. Thiselton Dyer remarks that this tree, an inhabitant of Malacca and Borneo, appears to be heterostyled.* He sent me dried flowers, and the difference between the two forms is conspicuous.
* 'Journal of Botany,' London, 1872, p. 26."
W. T. Thiselton Dyer. 1872. Dimorphism in Hypericineæ. Journal of Botany 10: 26: "Dimorphism in Hypericineæ. — In examining the Indian and Malayan species of this family, I have met with a marked case of dimorphism in Cratoxylon formosum (Benth. and Hook. f. Gen. PL i. 166). This is figured as Tridesmis formosa by Korthals (Vech. Nat. Gesch. Bot. t. 37), with long styles exceeding the stamens. Amongst the specimens in the Kew herbarium, besides long-styled forms, there are others in which the styles are much shorter than the stamens. As the species is said to become a large tree, it would be interesting to know whether different branches of the same individual produced the two kinds of flowers. Otherwise if the dimorphism were complete, it would be a serious obstacle to the production of seed."]


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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

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