Abstract
DARWIN directed attention to the slight asymmetry the petal growth of the scarlet-runner bean, Phasiolus multiftorus, that offered advantage to the bee for more easily reaching the nectar on that side of the flower where fertilisation would be helped by the visiting insect. I remember some years ago many times satisfactorily confirming the recorded fact by observation, but this year I am surprised to note quite a different practice in respect to insect visits these flowers.
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LOWE, H. Bees and the Scarlet-Runner Bean. Nature 105, 742 (1920). https://doi.org/10.1038/105742a0
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DOI: https://doi.org/10.1038/105742a0
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