. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ASCLEPIADEAE 93 1875. V. medium Decne. (=V. latifolium C. Koch).— Visitors.—Plateau saw the hover-fly Melanostoma mellina L. in the Ghent Botanic Garden. 1876. V. purpurascens C. Morr. et Decne.— Visitors.—Plateau saw the house-fly Musca domestica L. in the Ghent Botanic Garden. 569. Asclepias L. Pinch-trap flowers. Pollination eff'ected by the legs of insects. 1877. A. syriaca L. (=A. Cornuti Decne.). (Delpino, ' Sugli appar. d. fecondaz. nelle piante autoc
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ASCLEPIADEAE 93 1875. V. medium Decne. (=V. latifolium C. Koch).— Visitors.—Plateau saw the hover-fly Melanostoma mellina L. in the Ghent Botanic Garden. 1876. V. purpurascens C. Morr. et Decne.— Visitors.—Plateau saw the house-fly Musca domestica L. in the Ghent Botanic Garden. 569. Asclepias L. Pinch-trap flowers. Pollination eff'ected by the legs of insects. 1877. A. syriaca L. (=A. Cornuti Decne.). (Delpino, ' Sugli appar. d. fecondaz. nelle piante autocarp.,' pp. 6-15; Hildebrand, Bot. Ztg., Leipzig, xxiv, 1866, p. 376, XXV, 1867, pp. 265, 273, 281; J. P. Mansel Weale, J. Linn. Soc, Bot., London, xiii, 1873, pp. 48-58 ; Herm. Mijller,' Fertilisation,'pp. 396-400,' Weit. Beob.,'III, p. 61 ; T. H. Corry, Trans. Linn. Soc, Bot., London, Ser. 2, ii, 1884, pp. 173-207, Proc. Phil. Soc, Cambridge, iv, 1883, pp. 5-6 ; Stadler, 'Beitrage.')—Hildebrand has given the rnost exhaustive account of the way in which this species is pollinated by insects, while Hermann MuUer was the first to publish drawings of the flower mechanism (Fig. 255), which agrees essentially with that of Vincetoxicum Fig. 256. AscUpias syriaca, Decne. (from K. Schumann, after Payer). A. Flower seen from the side: ca, calyx ; «?, corolla. B, Do., after removal of calyx and corolla, visited hy a wasp, to the feet of which some poUinia are attached. C. Longitudinal section of flower: n, corolla; anth, anthers; /r, ovary; Kfl, stigmatic disk; st, stamens. But while the latter is a pinch-trap flower adapted to nectar-seeking flies, to the proboscis bristles of which its minute clips become attached, Asclepias syriaca bears flowers of a kind adapted to bees, the claws of which become entangled in the clips and carry off the pollinia to be introduced into the stigmatic chambers of other blossoms. As before, an odour of honey is exhaled. The petaloi
Size: 2635px × 949px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisheroxfor, bookyear1906
