. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 524 ANGIOSPERMAE—DICOTYLEDONES stigmas, in Wurtemberg ; but in the South Tyrol, according to Schulz, there is variation between protogyny, homogamy, and sUght protandry. Kerner says that their odour suggests herring-brine (trimethylaniide), while Kirchner describes it as meal-like. The latter also states that, after the flowers have opened, the tips of the petals sometimes bend right back, and the stamens diverge so much as to be almost in one plane; their a
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 524 ANGIOSPERMAE—DICOTYLEDONES stigmas, in Wurtemberg ; but in the South Tyrol, according to Schulz, there is variation between protogyny, homogamy, and sUght protandry. Kerner says that their odour suggests herring-brine (trimethylaniide), while Kirchner describes it as meal-like. The latter also states that, after the flowers have opened, the tips of the petals sometimes bend right back, and the stamens diverge so much as to be almost in one plane; their anthers, however, are still unripe, while the three short stigmas are fully mature. The tips of the petals then grow to some extent, and assume a yellowish colour; the anthers dehisce downwards and outwards, the stigmas remaining receptive. All the flowers of an inflorescence, at a given time, are in about the same stage of anthesis. As the inflorescences are of more inconspicuous greenish colour in the first (female) than in the second (hermaphrodite) stage, flowers in the latter condition are usually first visited by insects, which afterwards transfer the pollen to those in the female stage. In the second stage automatic self- and cross-pollination are both possible, for the numerous flowers are turned in all directions. Kerner describes geitonogamy as taking place in the later stages of anthesis by elongation and bending of the filaments, so that pollen is applied to the stigmas of neighbouring flowers. Visitors.—Redtenbacher (Vienna) noticed 2 Cerambycid beetles — Leptura virens L., and Strangalia quadrifasciata L. 1211. S. australis Cham, et Schlecht.—K. gynodioecious (Ber. D. bot. Ges., Berlin, ii, 1884). Miiller describes this species as 386. Viburnum L. Flowers white in colour, possessing an odour of amide; arranged in umbellate cymes ; homogamous; with exposed to half-concealed nectar, secreted in a fiat layer on the upper surface of the ovary, immediately below
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