RECORD: Darwin, C. R. 1864.09.03. [Note on Stanhopea.] CUL-DAR70.115-116. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 9.2021. 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-DAR70 contains material for Darwin's book Orchids (2d ed. 1877).
[115]
(1)
Sept. 3d 1864. Stanhopea (with petals & sepals finely spotted with purple, with large eye-like purple spot on each side of basal cup of Labellum)
Pollinia will not stick in very narrow & little viscid stigma, so like Acropera. It is very remarkable no true caudicle, pollen-mass can be torn with pincers rather than separate from pedicel. Seeing that column curves towards wonderful labellum, which has lateral horns (& in former species in my House these horns embraced the column) I was led to scrape end of naked or gloved finger down concave column & this always removed pollinia. I then scraped finger, charged with pollinia, again down column, (even after
[115v]
Sept 7
[No] the truth is that caudicle so tough can hardly be separated pollen-mass back [illeg] as flower wither much viscid secretion from stigma.
[116]
(2)
havng stuck [illeg] to finger) & pollinia was always rubbed off by [illeg], hard, sharp upper (column being upright & so in reversed position to natural position) & was left sticking irregularly by disk close to stigmatic cavity. Case like Iris. [insertion:] affected on Sept 2d & 3d
Now will tubes protrude?
I have put 2 pollinia evening of Sept. 3d sticking to column far from stigmatic cavity
Sept 8 pollen-tubes now just coming out after the old pollinia had been pushed into great drop of fluid at mouth of stigmatic cavity.
I believe all a mistake about pollen-tubes confervae!!!
(Not one of these set; but I do not give up view)
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 17 October, 2023