. Aspects of plant life; with special reference to the British flora. Plants. POLLINATION MECHANISMS 93 nectar is stored. The stamens, only two of which are developed, have each a hinge near the top, the part above the hinge being like a curved rod supported near its middle. These two curved rods stand nor- mally in a vertical position, so that their lower ends partly block the entrance to the tube; the pollen is borne at their upper ends. Should a bee insert its head down the tube in search of nectar, it pushes the lower ends of the hinged rods upwards, with the. Fig. i8.—Flower and Fruit of
. Aspects of plant life; with special reference to the British flora. Plants. POLLINATION MECHANISMS 93 nectar is stored. The stamens, only two of which are developed, have each a hinge near the top, the part above the hinge being like a curved rod supported near its middle. These two curved rods stand nor- mally in a vertical position, so that their lower ends partly block the entrance to the tube; the pollen is borne at their upper ends. Should a bee insert its head down the tube in search of nectar, it pushes the lower ends of the hinged rods upwards, with the. Fig. i8.—Flower and Fruit of Linaria purpurea. I-. result that their upper ends swing downward against the bee's back, dusting it with pollen just at that part of its body which, if the bee should visit a rather older flower, would come in contact with the stigma, the slender stalk of which (the style) increases in length during the period of flowering, and is in consequence the more Hable to be encountered. Only one more instance can be referred to, which can be tested by the reader any summer day wherever. 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 Praeger, R. Lloyd (Robert Lloyd), 1865-1953. London, Society for Promoting Christian Knowledge
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectplants, bookyear1921
