From:
Charles Robert Darwin
To:
Joseph Dalton Hooker
Date:
[28 July – 10 Aug 1861]
Source of text:
DAR 115: 109
Summary:
Puzzled by function of orchids’ rostellum.
Orchids’ pollen concentrated in two pollinia; hence one flower can fertilise only two others. This may explain precision of orchid pollination mechanisms.
Contributor:
Darwin Correspondence Project
