From Daniel Oliver [after 8 October 1861]1
I find no trace of nectar or other secretion in the hollow base of labell of St. Saccata2
The papillae wh. clothe it are more or less moist, but no accumulation as a drop—
Finds no trace of nectar in Stanhopea saccata.
Please cite as
Darwin Correspondence Project, “Letter no. 3280,” accessed on 31 August 2016, http://www.darwinproject.ac.uk/DCP-LETT-3280