. Darwinism; an exposition of the theory of natural selection, with some of its applications. Natural selection; Evolution. 314 DARWINISM. Fig. 30.—Orchis pyramidalis. Description of Figure. a ... anther. I r . rostellum I V . guiding ridges on labellum. s,s ... stigma. | I . labellum or lip. | n . nectary. A. Front view, with all the sepals and petals removed, except the labellum. B. Side view, with all the sepals and petals removed and the upper part of the flower C. The two pollinia attached to the saddle-shaped viscid disc. [bisected. D. The disc after the first act of contraction. E. The
. Darwinism; an exposition of the theory of natural selection, with some of its applications. Natural selection; Evolution. 314 DARWINISM. Fig. 30.—Orchis pyramidalis. Description of Figure. a ... anther. I r . rostellum I V . guiding ridges on labellum. s,s ... stigma. | I . labellum or lip. | n . nectary. A. Front view, with all the sepals and petals removed, except the labellum. B. Side view, with all the sepals and petals removed and the upper part of the flower C. The two pollinia attached to the saddle-shaped viscid disc. [bisected. D. The disc after the first act of contraction. E. The disc seen from above with one pollinium removed. F. The pollinia removed by the insertion of a needle into the nectary. G. The same pollinia after depression has taken 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 Wallace, Alfred Russel, 1823-1913. London, Macmillan and Co. ; New York, Macmillan Co.
Size: 1268px × 1970px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorwallacealfredrussel18, bookcentury1800, bookdecade1890
