. Botany of the living plant. Botany; Plants. I'.UTANY OF THE LIVING PLANT to the precocious growth of the megaspore which it envelops while young. Accordingly, it is not represented as a rule in the ripe seed, except by the remains of its tissue, which are crushed between the firm seed-coat and the endosperm or embryo within. On the other hand, the integument or integuments persist, developing into the testa, or seed-coat. Their tissues become indurated, of stony or leathery texture ; but there is a good deal of variety in the detail. Usually the outermost layer, but not infrequently some lay
. Botany of the living plant. Botany; Plants. I'.UTANY OF THE LIVING PLANT to the precocious growth of the megaspore which it envelops while young. Accordingly, it is not represented as a rule in the ripe seed, except by the remains of its tissue, which are crushed between the firm seed-coat and the endosperm or embryo within. On the other hand, the integument or integuments persist, developing into the testa, or seed-coat. Their tissues become indurated, of stony or leathery texture ; but there is a good deal of variety in the detail. Usually the outermost layer, but not infrequently some layer more deeply seated, develops its cells in prismatic form and thick- walled. Others may also harden : but the inner, softer layers are often com- pressed. The tissues lose their cell- contents, serving only the purpose of protection to the germ and the stores within. (Fig. 237.) When this condi- tion is reached in many-seeded ovaries. 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 Bower, F. O. (Frederick Orpen), 1855-1948; Wardlaw, C. W. (Claude Wilson), 1901-. London, Macmillan and Co. , ltd.
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