. Textbook of botany. Botany. S4 TEXTBOOK OF BOTANY 79. A Mold Plant (Fig. 22). — We can see with the aid of a hand lens that the body of the bread mold is made up of threads, somewhat hke those of Spirogyra, but branching abundantly, light-colored when young and darker or almost black when old. If we pick off a piece of a young mold plant and examine it under the microscope, we find that the. Fig. 22. — Part o£ a bread mold plant; 0, downward-growing branches which obtain food for the plant; b, a horizontal branch; c, young spore sacs, borne at the ends of upright branches; d, an older spore
. Textbook of botany. Botany. S4 TEXTBOOK OF BOTANY 79. A Mold Plant (Fig. 22). — We can see with the aid of a hand lens that the body of the bread mold is made up of threads, somewhat hke those of Spirogyra, but branching abundantly, light-colored when young and darker or almost black when old. If we pick off a piece of a young mold plant and examine it under the microscope, we find that the. Fig. 22. — Part o£ a bread mold plant; 0, downward-growing branches which obtain food for the plant; b, a horizontal branch; c, young spore sacs, borne at the ends of upright branches; d, an older spore sac contain- ing ripe spores; e and /, broken spore sacs from which the spores have escaped; in /, the internal dome-shaped wall has collapsed. threads are not divided by cross walls. In fact, the whole plant—making, with all its branches, a large, interlacing struc- ture — is, at least while it is comparatively young and growing rapidly, a single cell. This cell is much larger as well as more complex in form than any cell we have yet studied. The branches of the plant are of two kinds : horizontal ones (Fig. 22, fc) which grow upon or near the surface of the bread, and others that grow in groups from the horizontal branches downward into the substance of the bread (Fig. 22, a).. 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
