. On British wild flowers considered in relation to insects. Flowers; Fertilization of plants by insects; Plants. v.] SALVIA. 149 upper lip shows an arch at the part x, and the front portion of the lip, containing the stamens, is loftier than in Lamium, and does not therefore come in contact with the back of the bee (Fig. 112). In evi- dent correlation with this arrangement, we find a very remarkable difference in the stamens (Figs. 115-16). Two of the stamens (Fig. 112, /') are minute and udimentary. In the other pair, the two anther cells (Fig. 115 a, a') instead of being, as usual, close Ki
. On British wild flowers considered in relation to insects. Flowers; Fertilization of plants by insects; Plants. v.] SALVIA. 149 upper lip shows an arch at the part x, and the front portion of the lip, containing the stamens, is loftier than in Lamium, and does not therefore come in contact with the back of the bee (Fig. 112). In evi- dent correlation with this arrangement, we find a very remarkable difference in the stamens (Figs. 115-16). Two of the stamens (Fig. 112, /') are minute and udimentary. In the other pair, the two anther cells (Fig. 115 a, a') instead of being, as usual, close KiG 115.—Stamens in their natural Fig 116.—Stamens when moved by a Bee. together, are separated by a long connective (m). Moreover, the lower anther cells (a, a) contain very little pollen; sometimes indeed none at all. This portion of the stamen, as shown in Fig. 112, hangs down and partially stops up the mouth of the corolla tube. When, however, a bee thrusts its head into the tube in search of the honey, this part of the stamen is pushed into th^ arch (x), the con- nectives of the two large stamens revolve on their axis, and consequently the fertile anther cells (a). 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
