. Elementary botany. Botany. Fig. 285. Two different stages of young sporogoniuni of a moss, still «itliin the archegonium and wedg- -j-jjis is the columella, and is pres- ing their way into the tissue of the end 01 the stem, /i, neck of archegonium ; /, young sporogonium. ent in nearly all the mosses. Each This shows well the connection of the sporophvte ^ ,, ,," r ^^ r ^-i 1 with the gametophyte. ' of the cells of the fertile layer divides into four spores. 522. Development ol the sporogonium.—-The egg cell after fertilization divides by a wall crosswise to the axis of the archegonium.
. Elementary botany. Botany. Fig. 285. Two different stages of young sporogoniuni of a moss, still «itliin the archegonium and wedg- -j-jjis is the columella, and is pres- ing their way into the tissue of the end 01 the stem, /i, neck of archegonium ; /, young sporogonium. ent in nearly all the mosses. Each This shows well the connection of the sporophvte ^ ,, ,," r ^^ r ^-i 1 with the gametophyte. ' of the cells of the fertile layer divides into four spores. 522. Development ol the sporogonium.—-The egg cell after fertilization divides by a wall crosswise to the axis of the archegonium. Each of these cells continues to divide fur a time, so that a cylinder pointed at both ends is formed. The lower end of this cylinder of tissue wedges its way down through the base of the archegonium into the tissue of the end of the moss stem as shown in fig. 2S5. This forms the foot through which the nutrient. 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 Atkinson, George Francis, 1854-1918. New York : H. Holt
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