. Fundamentals of botany. Botany. LIFE HISTORY OF A LIVERWORT 219 not all mature at the same time, as in the mosses and ferns, but new spores continue to" form in the region of intercalary growth so long as growth continues. As the spores mature the tip of the sporophyte splits open, and the walls spread apart progressively, as spores lower down come to Fig. 165.—Anthoceros. Photomicrograph of a longitudinal section of the sporogonium, and portion of the gametophytic thallus. Note the foot of the sporogonium, and the more darkly stained spores at the center, above. 200. Distrib
. Fundamentals of botany. Botany. LIFE HISTORY OF A LIVERWORT 219 not all mature at the same time, as in the mosses and ferns, but new spores continue to" form in the region of intercalary growth so long as growth continues. As the spores mature the tip of the sporophyte splits open, and the walls spread apart progressively, as spores lower down come to Fig. 165.—Anthoceros. Photomicrograph of a longitudinal section of the sporogonium, and portion of the gametophytic thallus. Note the foot of the sporogonium, and the more darkly stained spores at the center, above. 200. Distribution of Spores.—In addition to spores, a portion of the tissue of the archesporium develops sterile cells or cell-rows, called elaters (Fig. 166). When these become dry, as the sporogonium splits open from ,. 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 Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's son & co.
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Keywords: ., bookauthorgag, bookcentury1900, bookdecade1910, booksubjectbotany
