. Outlines of plant life : with special reference to form and function . Botany. Fig. 146. Fig. 147. Fig. T46.—Longitudinal section of the simple spore case of a mold (Mzecor). The aerial hypha, A, has partitioned off a cell, j, within which spores are produced. The walls of this spore case are studded with needle crystals of calcium oxalate. The partition protrudes far into the spore case. Magnified 260 diam.—After Kerner. Fig. 147.—Longitudinal section of the stem, j, of a moss gametophyte, hearing leaves, 6. Embedded in the stem is the sporophyte, consisting of a stalk, st, and a compound s
. Outlines of plant life : with special reference to form and function . Botany. Fig. 146. Fig. 147. Fig. T46.—Longitudinal section of the simple spore case of a mold (Mzecor). The aerial hypha, A, has partitioned off a cell, j, within which spores are produced. The walls of this spore case are studded with needle crystals of calcium oxalate. The partition protrudes far into the spore case. Magnified 260 diam.—After Kerner. Fig. 147.—Longitudinal section of the stem, j, of a moss gametophyte, hearing leaves, 6. Embedded in the stem is the sporophyte, consisting of a stalk, st, and a compound spore case, of which w is the waif, formed of a sheet of cells, enclosing the spores, sp (contents not shown). Magnified loo diam.—After Hofmeister. either from superficial or from internal cells. As a conse- quence, the mature sporangia will be either free or more or less enclosed within the tissues of the organ by which they are borne. 273. The sporophyte.—Among the mossworts, fernworts, and seed plants reproduction by spores has become so fixed and important that one stage in the plant is devoted espe- cially to producing them. This phase is different from that producing sex cells, the difference becoming greater the more complex the plant. The stage set apart for spore production is called the sporophyte. In the mossworts the sporophyte has very little green tissue, and therefore carries on little nutritive work, but depends for its supply of food chiefly. 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 Barnes, Charles Reid, 1858-1910. New York : Henry Holt and Company
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