. Textbook of botany. Botany. 128 TEXTBOOK OF BOTANY thing that distinguishes the seed plants. The embryo now Hes within the tissues of its parent, the female plant; the latter lies within the macrospore sac, which in turn is surrounded by the integument. All these parts together make up the seed. Thus the seed is a complex structure, whose different parts represent three generations. The in- tegument and the macrospore sac belong to the same generation as the tree, that is, to the old asexual generation. The female plant belongs to the sexual generation; and the embryo is the new asexual gene
. Textbook of botany. Botany. 128 TEXTBOOK OF BOTANY thing that distinguishes the seed plants. The embryo now Hes within the tissues of its parent, the female plant; the latter lies within the macrospore sac, which in turn is surrounded by the integument. All these parts together make up the seed. Thus the seed is a complex structure, whose different parts represent three generations. The in- tegument and the macrospore sac belong to the same generation as the tree, that is, to the old asexual generation. The female plant belongs to the sexual generation; and the embryo is the new asexual generation. Changes take place in all these parts as the seed ripens. The integument develops into two seed coats : an outer one. 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 Allen, Charles E. (Charles Elmer), b. 1872; Gilbert, Edward Martinius, joint author. Boston, New York [etc. ] D. C. Heath & co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1917
