. Handbook of flower pollination : based upon Hermann MuÌller's work 'The fertilisation of flowers by insects' . Fertilization of plants. I go ANGIOSPERMAEâDICOTYLEDONES 2115. V. Anagallis L. (MacLeod, Bot. Jaarb. Dodonaea, Ghent, v, 1893, p. 34^.)âMacLeod says that automatic self-pollination is easily possible in this species. Visitors.âThe following were recorded by the observers, and for the localities stated.â Heinsius (Belgium), the hover-fly Syritta pipiens L. Loew (Silesia), the hover- fly Helophilus lineatus F., skg. Herm. Miiller (Thuringia), an Empid (Empis livida L., skg.), a Muscid
. Handbook of flower pollination : based upon Hermann MuÌller's work 'The fertilisation of flowers by insects' . Fertilization of plants. I go ANGIOSPERMAEâDICOTYLEDONES 2115. V. Anagallis L. (MacLeod, Bot. Jaarb. Dodonaea, Ghent, v, 1893, p. 34^.)âMacLeod says that automatic self-pollination is easily possible in this species. Visitors.âThe following were recorded by the observers, and for the localities stated.â Heinsius (Belgium), the hover-fly Syritta pipiens L. Loew (Silesia), the hover- fly Helophilus lineatus F., skg. Herm. Miiller (Thuringia), an Empid (Empis livida L., skg.), a Muscid (Anthomyia sp., skg.), 2 hover-flies (sp. of Ascia and Syritta, skg. and po-dvg.), and an ant (Lasius niger Z., nect-lkg.) ('Weit. Beob.,' Ill, p. 33). Warnstorf (Verb. bot. Ver., Berlin, xxxviii, 1896) describes the variety b. aquaiica L. as protogynous. The stamens project a little beyond the stigma, to which the dehiscing anthers are applied, so that self-pollination easily takes place. The pollen- grains are white in colour, ellipsoidal, beset with small tubercles, up 10 50 /a long and 20/i broad. Beccabunga L. (Herm. Muller, ' Fertilisation,'pp. 439-41, 'Weit. 33; Kirchner, 'Flora v. Stuttgart,' p. 588; Knuth, ' Bloemenbiol. 2116. V. Beob.,' m, Fig. 295. Veronica Beccabunga, L. {^'i^^^'^^'^'^- MUUer). (l) Flower seen obliquely from above. (2) Corolla after removal of the stamens, seen directly from the front. (3) Pistil and nectary, seen from the side, a, sepals; b, corolla; c, 61anients; d, ovary; e, style; f, stigraa: ^, nectary; h, nectar-cover, (i & 2, â < 3 ; 3, X 7.) Bijdragen.') â The dark sky-blue flowers of this species are pro- togynous, and agree with V. Chamaedrys as regards secretion and concealment of nectar. They expand in the sunshine to form a flat surface, from which the sta- mens diverge upwards and outwards, the anthers being at a distance from the stigma when they dehisce. During unfavourable weather the flowers remain half- closed,
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