. Botany of the living plant. Botany. Fig. 311. /I = archegonium of Riccia trichocarpa, showing ventral canal cell (v) and ovum. ( x 325). B=ripe archegonium of Riccia glaiica. ( x 260). (.\fter Campbell.) The sporogonium itself is on a simpler scale than that of the Mosses. Excepting the peculiar group of the Anthoceroteae, it does not carr\' on photo-synthesis, nor is there any complete columella. Moreover the sporogonium is longer enclosed in the archegonial wall ; but it bursts it at maturity, when the seta elongates, bearing outwards the spherical head. There is no operculum, but the rela
. Botany of the living plant. Botany. Fig. 311. /I = archegonium of Riccia trichocarpa, showing ventral canal cell (v) and ovum. ( x 325). B=ripe archegonium of Riccia glaiica. ( x 260). (.\fter Campbell.) The sporogonium itself is on a simpler scale than that of the Mosses. Excepting the peculiar group of the Anthoceroteae, it does not carr\' on photo-synthesis, nor is there any complete columella. Moreover the sporogonium is longer enclosed in the archegonial wall ; but it bursts it at maturity, when the seta elongates, bearing outwards the spherical head. There is no operculum, but the relatively thin wall bursts, usually into four valves, and the spores, interspersed among fibrous elaters that help to distribute them, are exposed as a flocculeni mass to the breeze, and are scattered in the dr>' state. Though the details are different from those of the Mosses, the end is the same (Fig. 312).. 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 Bower, F. O. (Frederick Orpen), 1855-1948. London, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1919
