. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. Fig. 21. Flmucrs with partly concealed nectar, (i) Potentilla minima .fliZ/^r. (2) Saxifra^a rotundifolia L. (3) Berberis vulgaris L. The honey-bee is here met with as a much more eager visitor, and greater numbers of other long-tongued bees seek out the nectar, which is more conveniently situated for them, or collect the pollen that is usually present in abundance. It follows that the flowers of this group, as well as their insect visitors, are in a distinc
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. Fig. 21. Flmucrs with partly concealed nectar, (i) Potentilla minima .fliZ/^r. (2) Saxifra^a rotundifolia L. (3) Berberis vulgaris L. The honey-bee is here met with as a much more eager visitor, and greater numbers of other long-tongued bees seek out the nectar, which is more conveniently situated for them, or collect the pollen that is usually present in abundance. It follows that the flowers of this group, as well as their insect visitors, are in a distinctly higher stage of development than the flowers and insects of the previous class. The degree of specialization of the insects corresponds to that of the flowers. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Knuth, Paul, 1854-1899; Knuth, Paul, 1854-1899; Mu?ller, Hermann, 1829-1883; Ainsworth Davis, J. R. (James Richard), 1861-1934. Oxford : Clarendon Press
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