Das historische Buch konnen zahlreiche Rechtschreibfehler, fehlende Texte, Bilder, oder einen Index. Kaufer konnen eine kostenlose gescannte Kopie des Originals (ohne Tippfehler) durch den Verlag. Nicht dargestellt. 1908 edition. Auszug: ...(Herm. Muller, 'Fertilisation, ' p. 217; Kirchner, 'Flora v. Stuttgart, ' pp. 575-6; Knuth, 'Bloemenbiol. Bijdragen.')--The flower mechanism of this species agrees completely with that of P. vulgaris, and was first described by Farrer (Ann. Mag. Nat. Hist., London, Ser. 4, ii, 1868, pp. ...
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Das historische Buch konnen zahlreiche Rechtschreibfehler, fehlende Texte, Bilder, oder einen Index. Kaufer konnen eine kostenlose gescannte Kopie des Originals (ohne Tippfehler) durch den Verlag. Nicht dargestellt. 1908 edition. Auszug: ...(Herm. Muller, 'Fertilisation, ' p. 217; Kirchner, 'Flora v. Stuttgart, ' pp. 575-6; Knuth, 'Bloemenbiol. Bijdragen.')--The flower mechanism of this species agrees completely with that of P. vulgaris, and was first described by Farrer (Ann. Mag. Nat. Hist., London, Ser. 4, ii, 1868, pp. 256-60). According to Ogle (Pop. Sci. Rev., London, ix, 1870, p. 166), the flowers are infertile when bees are excluded, but Kirchner says that they can produce perfect fruits by self-fertilization. The honey-bee and other small bees which are too feeble to depress the carina, use the holes made by Bombus terrester Z. in the calyx for stealing nectar. Hermann Mtiller states that more powerful bees, with a sufficiently long proboscis, alight upon the left ala and first touch the stigma with the base of their proboscis, when they thrust it into the base of the flower, and thus effect crosspollination as in P. vulgaris. As the interlocked alae and carina are pressed downwards, the spirally twisted end of the style protrudes from the tip of the carina, which is also coiled into a spiral of two turns. The stigma faces downwards and to the left, while the pollen-covered stylar brush rubs against the base of the bee's proboscis, and dusts it afresh. When insects visit the flowers cross-pollination is therefore assured, and self-pollination prevented. Hermann Muller states that automatic self-pollination is impossible, as the stigma projects from the tip of the carina, while the pollen is enclosed within it. V1s1tors.--I several times observed (at Kiel) Bombus hortorum L. 5 as an invited guest. Schletterer records Eucera longicornis L. for the Tyrol. 235. Apios Moench. 811. A. tuberosa Moench.--According to Loew's investigations (Flora, Marburg, ...
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