. Comparative morphology of Fungi. Fungi. t Fig. 228.—Thelebolus stercoreus. 1. Fructification in longitudinal section. The sheath, h, is only partially shown; actually, it entirely surrounds the ascus, s; t is the remnant of the ascogonium. 2. Mature fructification seen from above. (X 240; after Brefeld.) Lachnea stercorea (Fraser, 1907; Fraser and Brooks, 1909) forms its small, densely tomentose, orange fructifications, about 4 mm. in diameter, on excrement of various animals, especially of cattle, during the winter and spring. On any hypha a pyriform ascogonium with a long trichogyne develo
. Comparative morphology of Fungi. Fungi. t Fig. 228.—Thelebolus stercoreus. 1. Fructification in longitudinal section. The sheath, h, is only partially shown; actually, it entirely surrounds the ascus, s; t is the remnant of the ascogonium. 2. Mature fructification seen from above. (X 240; after Brefeld.) Lachnea stercorea (Fraser, 1907; Fraser and Brooks, 1909) forms its small, densely tomentose, orange fructifications, about 4 mm. in diameter, on excrement of various animals, especially of cattle, during the winter and spring. On any hypha a pyriform ascogonium with a long trichogyne develops as a branch which is separated from the main hypha by several stipe cells. The trichogyne is not unicellular, as in Pyronema confluens, but is divided into 4 to 6 cells of which the terminal is the longest. An antheridium, as in P. confluens, comes into open communication with the trichogyne. In no case could a dissolution of the wall of the basal trich- ogyne cell and migration of the male nucleus be proved. Probably, as in certain nutritive conditions in P. confluens, the male nuclei degenerate in the trichogyne, whereupon the ascogonial nuclei, after a single division, pair autogamously and form ascogenous hyphae. Thus the antheridium as well as the trichogyne is only 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 Gäumann, Ernst Albert, 1893-1963; Dodge, Carroll William, 1895-. New York [etc. ] McGraw-Hill Book Company, Inc.
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