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Darwin-Hooker Letters : Letter from C. R. Darwin to J. D. Hooker   [28 July – 10 August 1861]

Darwin, Charles Robert

Darwin-Hooker Letters

<p style='text-align: justify;'>Puzzled by function of orchids’ rostellum.</p><p style='text-align: justify;'>Orchids’ pollen concentrated in two pollinia; hence one flower can fertilise only two others. This may explain precision of orchid pollination mechanisms.</p>

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