. Nature and development of plants. Botany. DEVELOPMENT OF PLANTS 445 very common occurrence. These plants with their small white or yellow flowers aggregated in conspicuous inflorescences are among the most familiar weeds of waste places, fence rows and barren fields. The flowers are of a more specialized type than in the open blossoms of the buttercups and poppies, and present a variety of interesting devices that can only be hinted at in this lesson. More commonly, perhaps, the stigmas are receptive as soon as the flower opens and the anthers are still closed, thus. Fig. 309. Examples of th
. Nature and development of plants. Botany. DEVELOPMENT OF PLANTS 445 very common occurrence. These plants with their small white or yellow flowers aggregated in conspicuous inflorescences are among the most familiar weeds of waste places, fence rows and barren fields. The flowers are of a more specialized type than in the open blossoms of the buttercups and poppies, and present a variety of interesting devices that can only be hinted at in this lesson. More commonly, perhaps, the stigmas are receptive as soon as the flower opens and the anthers are still closed, thus. Fig. 309. Examples of the mustard family, order Papaverales: A, branch of Brassica, one of the turnips. B, a flower enlarged. C, flower in section. D, a petal, showing narrow claw and broad blade. E, pistil. F, fruit, the valves of the two carpels opened to show the seeds. ensuring crossing. The short stamens are more frequently util- ized only for crossing since they are below the stigma and so placed as to be in line with the nectar glands that are often located in sac-like enlargements of the perianth. The four long stamens. 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 Curtis, Carlton Clarence, 1864-1945. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisher, booksubjectbotany
