. On British wild flowers considered in relation to insects. Flowers; Fertilization of plants by insects; Plants. 76 OXALIS. [chap. which in the meantime has elongated, and assumes the position which the stamens had successively occupied ; the result of which is, that a bee which had pre- viously visited a younger flower and dusted her breast with pollen could not fail to deposit some of the pollen on the stigma. It will be observed that the lines on the flower as usual point to the honey. The three lower petals bear a number of lanceolate processes, which, as Sprengel has pointed out, serve.
. On British wild flowers considered in relation to insects. Flowers; Fertilization of plants by insects; Plants. 76 OXALIS. [chap. which in the meantime has elongated, and assumes the position which the stamens had successively occupied ; the result of which is, that a bee which had pre- viously visited a younger flower and dusted her breast with pollen could not fail to deposit some of the pollen on the stigma. It will be observed that the lines on the flower as usual point to the honey. The three lower petals bear a number of lanceolate processes, which, as Sprengel has pointed out, serve. Fig. 6s.— Flower of Tropcsolum major in the third stage. The anthers have all shed their pollen, and the pistil now occupies the position in front of the entrance to the spur. to prevent rain from obtaining access to the tube, and also perhaps in guiding the insects, so as to bring their breasts truly against the anther or stigma. The calyx, which from the position of the flower is almost as much exposed as the corolla, is of the same colour as the petals. Oxalis acetosella is one of the species which produces " cleistogamous " flowers (see ««/^ p. 32). This was first, I believe, observed by Michelet {Bull. Soc. Bot. de Fj-ance, i860, p. 465).. 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 Lubbock, John, Sir, 1834-1913. London, Macmillan and Co.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectflowers, booksubjectp
