. Fundamentals of botany. Botany. 262 STRUCTURE AND LIFE HISTORIES asexual spores, but differ from the spores of ferns, mosses, liverworts, and algae by usually, if not always, possessing more than one nucleus. They secrete a slimy substance. Fig. 188.—Rhizopus nigricans, i, Section of sporangium, showing cleavage of peripheral cytoplasm much further advanced than in Fig. 187. Furrows are here cutting outward from the columella cleft, X about 200; 2, section of sporangium in which the spores are completely formed, rounded up, and surrounded by thin walls. The columella wall is also formed, X a
. Fundamentals of botany. Botany. 262 STRUCTURE AND LIFE HISTORIES asexual spores, but differ from the spores of ferns, mosses, liverworts, and algae by usually, if not always, possessing more than one nucleus. They secrete a slimy substance. Fig. 188.—Rhizopus nigricans, i, Section of sporangium, showing cleavage of peripheral cytoplasm much further advanced than in Fig. 187. Furrows are here cutting outward from the columella cleft, X about 200; 2, section of sporangium in which the spores are completely formed, rounded up, and surrounded by thin walls. The columella wall is also formed, X about 200; 3, ripe spores in their living condition, showing variations in size, and ridges on their walls, X over 350. (After D. B. Swingle.) (Cf. Figs. 186 and 187.) in which they are imbedded. When ripe the wall of the sporangmm bursts open (Fig. 189), and the spores, thus set free, float away through the air in countless. 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
