. Handbook of flower pollination : based upon Hermann MuÌller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ROSACEAE 377 906. A. acutiloba Stev.â Visitors.âLoew observed a Bombyliid (Anthrax morio Z., skg.) and a Syrphid (Eristalis tenax Z., do.) in the Berlin Botanic Garden. 254. Sanguisorba L. Flowers apetalous, associated in capitula; either with half-concealed nectar, or anemophilous. 907. S. officinalis L. (Herm. Miiller, 'Fertilisation,' p. 236,'Alpenblumen,' pp. 224-5.)âIn the homogamous flowers of this species the receptacle encloses the ovary, and possess
. Handbook of flower pollination : based upon Hermann MuÌller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ROSACEAE 377 906. A. acutiloba Stev.â Visitors.âLoew observed a Bombyliid (Anthrax morio Z., skg.) and a Syrphid (Eristalis tenax Z., do.) in the Berlin Botanic Garden. 254. Sanguisorba L. Flowers apetalous, associated in capitula; either with half-concealed nectar, or anemophilous. 907. S. officinalis L. (Herm. Miiller, 'Fertilisation,' p. 236,'Alpenblumen,' pp. 224-5.)âIn the homogamous flowers of this species the receptacle encloses the ovary, and possesses a nectar-secreting ring that surrounds the base of the style. There are four ovate sepals, concave at their bases, and coloured red above. The)' serve as nectar receptacles, and also as a means of making the flower more con- spicuous. The 50-100 florets of a capitulum open in succession from below upwards in such a way that only a zone one floret deep is in bloom at the same time. In favourable weather insects appear in considerable numbers, and usually effect. Fig. 118. Alchevtitla Jissa, Schttm. (after Herm. Miiller). A. Hermaphrodite tetramerous flower. AK Pistil of same. B. Female tetramerous flower. B'. Pistil of same. C. Hermaphrodite trimerous flower, with one vestip^ial stamen. C Pistil of same. D. Flower in section. aJk, epicalyx; A, calyx; /{â , 6Iament: j, sepal; .y/, stigma; ov, ovary; «, nectary. crossing, for as a rule they touch the stigma and anthers with different sides of their heads. Sometimes, however, they bring about self-pollination, which may easily take place automatically. Visitors.âHerm. Miiller observed 4 Muscids, a Syrphid, and 11 Lepidoptera in the Alps. Loew noticed one species of hover-fly (Didea alneti Fall.) in the same region, and another (Syritta pipiens Z.) in the Berlin Botanic Garden. Rossler saw a butterfly (Lycaena euphemus Hb.) at Wiesbaden. In Dumfriesshire 5 Muscids were recorded (Scott-Elliot, ' Flora of Dumfriesshire,' p
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