. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. SCROPHULARINEAE 205 669. Pediculeiris L. Homogamous, rarely protogynous, humble-bee flowers, red or yellow in colour; with nectar secreted by a unilateral swelling on the lower side of the ovary. Ekstam observed no insect-visits in Nova Zemlia ( Ofvers., Stockholm, li, 1895). 2147. P. sylvatica L. (Sprengel, 'Entd. Geh.,' pp. 216-17; Hildebrand, Bot. Ztg., Leipzig, xxiv, 1866, p. 73; Ogle, Pop. Sci. Rev., London, ix, 1870, PP- 45-7; Herm. MuUer, 'Fer
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. SCROPHULARINEAE 205 669. Pediculeiris L. Homogamous, rarely protogynous, humble-bee flowers, red or yellow in colour; with nectar secreted by a unilateral swelling on the lower side of the ovary. Ekstam observed no insect-visits in Nova Zemlia ( Ofvers., Stockholm, li, 1895). 2147. P. sylvatica L. (Sprengel, 'Entd. Geh.,' pp. 216-17; Hildebrand, Bot. Ztg., Leipzig, xxiv, 1866, p. 73; Ogle, Pop. Sci. Rev., London, ix, 1870, PP- 45-7; Herm. MuUer, 'Fertilisation,' pp. 450-4, ' Weit. Beob.,' Ill, p. 41; Kirchner, ' Flora v. Stuttgart,' p. 597 ; Knuth, ' Bl. u. Insekt. a. d. nordfr. Ins.,' pp. 113, 165; Schulz, 'Beitrage,' II, p. 218.)—Hermann Miiller corrects the errors and supplies the omissions of Sprengel, Hildebrand, and Ogle, giving the following. Fig. 304. Pedicularis sylvatica^ L. (after Herm. Miiller). (i) Corolla, from the front. (2) Flower, Irom behind. (3) Upper part of the corolla, from the left side, after part of it has been cut away, and the anthers separated. (4) Transverse section of the corolla at c in (1). (i and 2 x 3J; 4x7.) a, point of insertion of the anterior stamens; 5, point of origin of the lower lip; bCy lower part of the mouth of the flower, closed by the apposition of the lower lip; (/, revolute edpe of the upper lip, set with teeth; f^ the hood whi-^h surrounds the anthers; ^, pendulous tip of the hood; A, ridge upon the side of the corolla, meeting the revolute border ti\.e\ k and /, shorter and longer stamens. comprehensive account of the mechanism of the rose-red flowers of this species (' Fertihsation,' pp. 450-4).— ' Honey is secreted by the green, fleshy base of the ovary, and lies at the bottom of the tube, which is 10 to 14 mm. long, laterally compressed, and so narrow that a humble-bee can only insert the forepart of its head. At the height of 10 to 14 mm. the tube divides into an u
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