. Nature and development of plants. Botany. Fig. 276. Seed structure: A, section of a nearly mature seed of Lepid- ium. The stem of the embryo is differentiated below into a hypocotyl, hy, and above into an epicotyl, pi, commonly known in the seed as the plumule, r, root with root cap; c, the two cotyledons, which are bent over, lying one upon the other; v, vascular bundles extending through the stem into the cotyledons, where they form a network of veins; en, remains of endosperm. B, section of seed of water lily (after Conard)—e, embryo, surrounded by a layer of endosperm cells; mg, cells of
. Nature and development of plants. Botany. Fig. 276. Seed structure: A, section of a nearly mature seed of Lepid- ium. The stem of the embryo is differentiated below into a hypocotyl, hy, and above into an epicotyl, pi, commonly known in the seed as the plumule, r, root with root cap; c, the two cotyledons, which are bent over, lying one upon the other; v, vascular bundles extending through the stem into the cotyledons, where they form a network of veins; en, remains of endosperm. B, section of seed of water lily (after Conard)—e, embryo, surrounded by a layer of endosperm cells; mg, cells of the raegasporangium; i, integument. or if by one valve the fruit is termed a follicle, example the peony. Frequently wing-like processes develop from the mega- sporophyll, as in the maple and ailanthus, which are of service in distribution and in other ways, as in the manufacture of foods, these organs often being green during the development of the embryo. Such fruits are known as key fruits or samaras. In other cases the sporophyll becomes fleshy, forming a berry as in the currant or the inner layer forms a pit or stone, while the outer. 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
