. The various contrivances by which orchids are fertilized by insects. Fertilization of plants; Orchids. CiiAP. III. OEPHALANTHEBA GEANDIFLORA. 81 view B, and side view C, in fig. 13). Whilst the flower is still in bud, the poUen-grains which rest against the upper sharp edge of the stigma (but not those in the upper or lower parts of the mass) emit a multitude of Fig. Cia'lJALASTllKRA 'I,OI1A. anther; in the front view, B, the two cells with the included pollen are seen. one of the two lateral rudimen- tary anthers, or auricles. , masses of pollen. stigma. distal portion of the l
. The various contrivances by which orchids are fertilized by insects. Fertilization of plants; Orchids. CiiAP. III. OEPHALANTHEBA GEANDIFLORA. 81 view B, and side view C, in fig. 13). Whilst the flower is still in bud, the poUen-grains which rest against the upper sharp edge of the stigma (but not those in the upper or lower parts of the mass) emit a multitude of Fig. Cia'lJALASTllKRA 'I,OI1A. anther; in the front view, B, the two cells with the included pollen are seen. one of the two lateral rudimen- tary anthers, or auricles. , masses of pollen. stigma. distal portion of the label I um. A. Oblique view of perfect flower, when fully expanded. B. Front view of column, with all the petals and sepals removed. C. Side view of coiumn, with all the sepals and petals removed; the narrow pillars of pollen (p) between the anther and stigma can just be seen. tubes; and these deeply penetrate the stigmatic tissue. After this period the stigma bends a little forward, and the result is that the two friable pillars of pollen are drawn a little forward and stand almost completely free 5. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Darwin, Charles, 1809-1882. New York, D. Appleton and Co.
Size: 838px × 2985px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1895
