. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. CAPRIFOLIA CEAE 529 In plants from Tegel, near Berlin, Loew (' Blutenbiol. Floristik.,' p. 250) observed but a very small quantity of pollen, which viras probably functionless, for the flowers never became fertilized. Loew suggests that a fungus parasitic in the anthers may have been the cause of this. Kerner describes the flowers as funnel-shaped, 10-12 mm. long, and possessing an odour of vanilla. He considers that they permit the access of tolerably short
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. CAPRIFOLIA CEAE 529 In plants from Tegel, near Berlin, Loew (' Blutenbiol. Floristik.,' p. 250) observed but a very small quantity of pollen, which viras probably functionless, for the flowers never became fertilized. Loew suggests that a fungus parasitic in the anthers may have been the cause of this. Kerner describes the flowers as funnel-shaped, 10-12 mm. long, and possessing an odour of vanilla. He considers that they permit the access of tolerably short- tongued insects. Visitors.— Herm. Miiller (Alps) observed 3 flies and a Lepidopterid; and. Fig. 173. Z,i«watfa 5or£a//j, Z-. (after Heni]. Miiller). A. Flower seen from the side, after removal of the right half of calyx and corolla (x 7). B. Lower half of the corolla, with the epipetalous stamens and the nectary, br^ bract; ca, calyx ; co, corolla ; k, nectary ; ov^ ovary ; st, stigma. Loew (Brandenburg) noticed the Dolichopodid Neurigona quadrifasciata F., skg. (.?) ('Beitrage,' p. 44). 392. Lonicera L. Flowers belonging to classes H or L; homogamous, protogynous, or pro- landrous; with concealed nectar, secreted by the receptacle or in a pouch of the corolla. 1221. L. Periclymenum. (Herm. Miiller, 'Fertilisation,' pp. 295-7, 'Weil. Beob.,' Ill, p. 75; Heinsius, Bot. Jaarb. Dodonaea, Ghent, iv, 1892; MacLeod, op cit., V, 1893, pp. 390-1 ; Knuth, ' Bl. u. Insekt. a. d. nordfr. Ins.,' pp. 90, 156, ' Weit. Beob. ii. Bl. u. Insekt. a. d. nordfr. Ins.,' pp. 234-5, Bot. Centralbl., Cassel, Ix, 1894, pp. 41-4; 'Bl. u. Insekt. a. Helgoland'; Warnstorf, Schr. natw. Ver., Ver., Wernigerode, xi, 1896.)—The protandrous flowers of this species belong to class Lm. Hermann MuUer describes them as homogamous, and gives the following illustration (Fig. 174), which applies to both L. Periclymenum and L. Caprifolium, except that in the latter the corolla-tube is 5-8 mm. longer. What is r
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