. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 146 ANGIOSPERMAE—DICOTYLEDONES with the hawk-moth, Macroglossa stellatarum Z., rendered famous by Hermann Miiller (cf. , p. 172; Vol. II, p. 139). (Cf. the review by Grevillius in Bot. Centralbl., Cassel, Ixxi, 1897.) 113. lonidium Vent. Some species of this genus are cleistogamous, according to Bernoulli (Bot. Ztg., Leipzig, xxvii, 1869). XIV. ORDER POLYGALEAE JUSS. The genus here to be considered is— 114. Polygala L. Literature.—Hildebrand, Bot. Ztg.,
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 146 ANGIOSPERMAE—DICOTYLEDONES with the hawk-moth, Macroglossa stellatarum Z., rendered famous by Hermann Miiller (cf. , p. 172; Vol. II, p. 139). (Cf. the review by Grevillius in Bot. Centralbl., Cassel, Ixxi, 1897.) 113. lonidium Vent. Some species of this genus are cleistogamous, according to Bernoulli (Bot. Ztg., Leipzig, xxvii, 1869). XIV. ORDER POLYGALEAE JUSS. The genus here to be considered is— 114. Polygala L. Literature.—Hildebrand, Bot. Ztg., Leipzig, xxv, 1867, p. 281; Knuth, 'Bl. u. Insekt. a. d. nordfr. Ins.,' p. 35. Homogamous bee flowers. The chief means of attracting insects are two large lateral petaloid sepals. The petals are usually of minor importance for this purpose, mainly serving to protect the stamens and pistil. Cleistogamy has also been observed (Kuhn).. Fig. 41. Polygala comosa, Schk. (after Hermann Miiller). (l) Flower seen from the side (the flower is represented erect instead of in the natural horizontal position): j, sepal; 5', one of the two lateral sepals that serve to attract insects; /, petal; p\ lower petal provided with digitate appendages, to which the insect clings when it alights. (2) Flower seen from below. (3) Lower petal enclosing the essential organs, seen from above ; a, anthers: ,v, stigma (with adhesive matter) ; /, spoon-shaped end of the style, which receives the pollen from the adjacent anthers. (4) Pistil, seen from above ; st, stigma ; /, spoon- shaped process; oz\ ovary. (5) The same, seen obliquely from above. (6t The same, seen from the side. (7) The lower petal of a flower just about to expand, split to show the anthers enclosed by it. (8) The coherent anthers. (91 A dehisced antlier; po, pollen-grains. Chodat (' Revision et critique des Polygala suisses,' Bui. Soc. Bot., Geneve, V, (1888) 1889, pp. 123-85) is of opinion that all the Swiss species of Polygala are
Size: 2416px × 1034px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisheroxfor, bookyear1906
