. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 200 A NGIOSPERMA E—DICOTYL ED ONES 2142. M. pratense L. (Herm. Miiller,' Fertilisation,' pp. 458-61,' Weit. Beob.,' Ill, p. 36; Kirchner, 'Flora v. Stuttgart,' pp. 594-5; MacLeod, Bot. Jaarb. Dodonaea, Ghent, v, 1893, pp. 354-6 ; Loew, 'Bliitenbiol. Floristik,' p. 399 ; Knuth, 'Blutenbiol. Beob. a. d. Ins. Riigen,' ' Bloemenbiol. Bijdragen.')—The horizontal flowers of this species possess a yellowish-white three-edged corolla-tube 14-15 mm. long, which conce
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 200 A NGIOSPERMA E—DICOTYL ED ONES 2142. M. pratense L. (Herm. Miiller,' Fertilisation,' pp. 458-61,' Weit. Beob.,' Ill, p. 36; Kirchner, 'Flora v. Stuttgart,' pp. 594-5; MacLeod, Bot. Jaarb. Dodonaea, Ghent, v, 1893, pp. 354-6 ; Loew, 'Bliitenbiol. Floristik,' p. 399 ; Knuth, 'Blutenbiol. Beob. a. d. Ins. Riigen,' ' Bloemenbiol. Bijdragen.')—The horizontal flowers of this species possess a yellowish-white three-edged corolla-tube 14-15 mm. long, which conceals a large quantity of nectar in its base, rising to a height of 2-3 mm. The nectary expands towards the lower lip into a whitish rounded body, on either side of which runs a nectar-secreting groove. A circlet of converging hairs protects the secretion from rain, which, owing to the protruding lower lip, is able to penetrate into the flowers in spite of their horizontal position. The corolla-tube is widened in front for a distance of 4-5 mm. sufficiently to permit of the easy insertion. Fig. 303. MeLampyriim pratense, L. (after Herm. Miiller). (i) Flower seen from the side (x 3). (2) Do., from above. {3) Do., from the front (x 7). (4) Pollen-receptacle formed by the anthers, from behind. (5) Do., after opening, from the front. (6) The two stamens of the right half of the flower, seen from the left. (7) Relative position of the stigma and pollen-receptacle, a, lateral fold of the anterior part of the corolla ; b, nectar-guide; c, stigma ; t/, hairy covering of the pollen-receptacle; e, teeth of the filaments; f, spine-like appendages of the anthers. of the head of a humble-bee. In this widened part a fold projects inwards from the lower part of each side-wall, abutting upon the under-side of the tube so as to reduce the opening of the flower to a breadth of scarcely 3 mm. The height of this is narrowed to 1-2 mm. by two dark-yellow protrusions of the lower lip, serving as n
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