The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. 1862.04.15. Mr Horwood gave me Hedaroma. CUL-DAR49.71. 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.

John Horwood (1823-c.1880) was the head gardener of Darwin's neighbour G.H. Turnbull. 1862-63 Horwood superintended the building of Darwin's hothouse. Darwin acknowledged his assistance in Orchids, p. 158.

[71]

Ap. 15 - 1862. Mr Horwood) gave me Hedaroma (tulipi forma?) (a Myrtle-bloom) Flowers in capitulum, with compound calyx (like compositæ) making flowers like tulip in shape - Numerous little flowers at base with much nectar

Each with 10 small anthers (collecting with rudimentary anthers) & with pistil slanting up one side above them. The stigma at tip very minute. - Long collecting hairs join little way from tip covered with glutinous pollen (pollen-grains Δ), which must somehow in bud be scraped off anthers - The latter stems come way apart.- Glutinous pollen sticks to Hairs.

[sketch]

/over

[71v]

Probably anthers are close (Hooker suggests) together at early period & then pollen gets brushed out.

Dichogamy

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