Fungi, Ascomycetes, Ustilaginales, Uredinales . ; the rest, as a rule, are uninucleate. Just after fertilization the sheath begins to grow up (fig. 44 o), springingin this case from the stalk cell of the antheridium, as well as from that ofthe oogonium, and developing into the three layers described above. The ascogenous hyphae arise as lateral branches from the septateoogonium (fig. 44 c), all or most being derived from the penultimate cellabout which they are crowded and intertwined. They are at first multi-nucleate, and, as development proceeds, push up vertically within the peri-thecium (f
Fungi, Ascomycetes, Ustilaginales, Uredinales . ; the rest, as a rule, are uninucleate. Just after fertilization the sheath begins to grow up (fig. 44 o), springingin this case from the stalk cell of the antheridium, as well as from that ofthe oogonium, and developing into the three layers described above. The ascogenous hyphae arise as lateral branches from the septateoogonium (fig. 44 c), all or most being derived from the penultimate cellabout which they are crowded and intertwined. They are at first multi-nucleate, and, as development proceeds, push up vertically within the peri-thecium (fig. 45); septation then takes place. The asci, of which there areseveral in each perithecium, arise as lateral outgrowths from the intercalarycells, or are formed directly from the terminal cells of the ascogenous young ascus contains two nuclei, but the remaining cells are almostwithout exception uninucleate. Fusion takes place in the ascus (fig. 46) andis followed by three nuclear divisions ; as a rule only two spores are
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectfungi, bookyear1922
