. A text-book of botany for secondary schools. Botany. FLOWERS AND INSECTS 249 adapted to the large moths, with long proboscides which can reach the bottom of the tube. As the moth thrusts its proboscis into the tube, its head is pressed against the sticky button on each side, so that when it flies away these buttons stick to its head and the pollen masses are torn out. When the next flower is visited these pollen masses are thrust against the stigmatic surface. (2) Consecutive maturity.—In these cases pollen and stig- ma of the same flower are not mature at the same time. This is a common met
. A text-book of botany for secondary schools. Botany. FLOWERS AND INSECTS 249 adapted to the large moths, with long proboscides which can reach the bottom of the tube. As the moth thrusts its proboscis into the tube, its head is pressed against the sticky button on each side, so that when it flies away these buttons stick to its head and the pollen masses are torn out. When the next flower is visited these pollen masses are thrust against the stigmatic surface. (2) Consecutive maturity.—In these cases pollen and stig- ma of the same flower are not mature at the same time. This is a common method of preventing self-pollination, and it is evident that it is effective. When the pollen is being shed, the stigma is not ready to receive; or when the stigma is ready to receive, the pollen is not ready to be shed. When the flowers of the ordinary figwort first open, the style bearing the stigma at its tip is found protruding. 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 Coulter, John Merle, 1851-1928. New York, D. Appleton
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1906
