The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. 1863.03.19. Begonia. CUL-DAR49.83. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 1.2022. 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-DAR49 contains notes for Natural selection chap. 3 on 'On...organic beings occasionally crossing' or dichogamy.

[83]

Begonia

March 19th /63 /

Pollen coherent, not easily blown off - no apparent nectar. In female flower ridge to ovarium (? sepals) are decidedly sweet & acid; petals early fall off & expose these ridges. In each flower bases of sepal thinner, but same taste. - Stigma larger & rougher Begonia not in Kurr.

In B. Sandersii, in B. villifolia & B. suaveolens I observe all male fl. produced before any females. (so dichogamy dioicous) in D. frigida, something of this kind, but on distinct branches male & female flowers do occur. - Begonia is in male & female at same time: do B. frigida.

Apr 6th I now see B. suaveolens with branch of opposite sexes at same time.

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