. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. SOLANACEAE '55 628. Nicandra Adans. Flowers wiih concealed nectar, secreted by the base of the ovary. 2029. N. physaloides Gaertn. (Sprengel, 'Entd. Geh.,' p. 126; Kerner, 'Nat. Hist. PI.,' Eng. Ed. i, II, p. 217.)—The whitish bell-shaped flowers of this species possess a bright-blue corolla-limb. Kerner says they open about 11-12 in the morning, closing again about 3-4 p. m. The filaments bend into a semicircular curve, bringing the anthers into contact wit
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. SOLANACEAE '55 628. Nicandra Adans. Flowers wiih concealed nectar, secreted by the base of the ovary. 2029. N. physaloides Gaertn. (Sprengel, 'Entd. Geh.,' p. 126; Kerner, 'Nat. Hist. PI.,' Eng. Ed. i, II, p. 217.)—The whitish bell-shaped flowers of this species possess a bright-blue corolla-limb. Kerner says they open about 11-12 in the morning, closing again about 3-4 p. m. The filaments bend into a semicircular curve, bringing the anthers into contact with the stigma and thus automatically effecting self-pollination. The stigma withers and turns brown an hour after it is pollinated, the style falls off at the same time, and the corolla fades. Sprengel states that the bases of the anthers are thickly clothed with hairs serving as nectar-covers. The nectar-guides are in the form of five dark-blue blotches at the base of the corolla, alternating with the filaments and situated immediately above the nectar-covers. Visitors.—In the Garden of the Kiel Ober-Realschule I saw (10. 9.'97) honey-bees which crawled completely into the flowers to suck the nectar, and effected cross-pollination. 629. Atropa L. Protogynous humble-bee flowers; with nectar secreted at the base of the ovary, and concealed in the lowest contracted part of the bell-shaped corolla. 2030. A. Belladonna L. (Herm. Miiller, ' Weit. Bcob.,' Ill, pp. 24-6; Kirchner, ' Flora v. Stuttgart,' pp. 569-70 ; Knuth, ' Bloemenbiol. Bijdragen '; Kerner, 'Nat. Hist. PI.,' Eng. Ed. i, II, p. 305.)—In this species the limb and ventricose part of the corolla are coloured dirty-brown red, and its lower part dirty yellow-green. The measurements of the beO correspond in size and shape to a medium-sized humble-bee. The flowers are directed obliquely downwards, horizontally, or it may be upwards, so that their interior is not always protected from rain. Small unbidden insect guests a
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