. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 268 ANCIOSPERMAE—DICOTYLEDONES Visitors.—Hem:. Muller ('Fertilisation,' p. 193) in Westphalia, and myself in Fohr and Amrum, observed the honey-bee. At Wiesbaden Rfissler noticed the moth Threnodes poUinalis S. V. as an unbidden guest. 196. Ulex L. As the last genus. 646. U. europaeus L. (Ogle, Pop. Sci. Rev., London, ix, 1870, pp. 164-5; Heinsius, Bot. Jaarb. Dodonaea, Ghent, iv, 1892, pp. loi et seq.; Knuth, ' Bloemen- biol. Bijdragen.')—Ogle states that t
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 268 ANCIOSPERMAE—DICOTYLEDONES Visitors.—Hem:. Muller ('Fertilisation,' p. 193) in Westphalia, and myself in Fohr and Amrum, observed the honey-bee. At Wiesbaden Rfissler noticed the moth Threnodes poUinalis S. V. as an unbidden guest. 196. Ulex L. As the last genus. 646. U. europaeus L. (Ogle, Pop. Sci. Rev., London, ix, 1870, pp. 164-5; Heinsius, Bot. Jaarb. Dodonaea, Ghent, iv, 1892, pp. loi et seq.; Knuth, ' Bloemen- biol. Bijdragen.')—Ogle states that the flower mechanism of this species agrees with that of G. tinctoria, and Kerner also describes it as an explosive arrangement. But, according to my own observations, the contrary tensions of stamens and style on the one hand, and carina and alae on the other, are not so strong, so that the mechanism much more closely resembles those of G. anglica and G. Fig. 85. U/£x europaeus, L. {from nature). A. Exploded flower; s, stigma. 5, C. An ala, seen from within and without. D. Stamens and pistil enclosed in the carina, and seen by transparency. The style is bent like a spring, so that the stigma is pressed against the cohering upper edges of the carina! petals. B. The same, removed from the carina. The carina and alae are only united together at one point on the upper side of their claws, where some of the epidermal cells interlock, and an alar projection fits into a carinal pit on either side. The union is so slight that the petals can easily be separated without tearing. Although explosion is but feeble, the pollen is so completely discharged on to the ventral surface of the visiting bee, that when this has flown away scarcely a single grain can be found upon the anthers. Visitors.—In the island of Fohr ('Bl. u. Insekt. a. d. nordfr. Ins.,' p. 85) I saw numerous well-developed fruits, indicating insect-visits, although I never actually observed these. The size o
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