. Comparative morphology of Fungi. Fungi. 216 COMPARATIVE MORPHOLOGY OF FUNGI Plectascales, but elongate-clavate; they are pressed together in a palisade and force the stromatic ground tissue, the so-called interthecial stroma (Fig. 139, 2) together to paraphysoid filaments, the pseudoparaphyses or paraphysoids (terminology of Petrak, 1923). The paraphysoids differ from paraphyses in that, as the remains of the interthecial stroma, they have a cellular structure and do not terminate freely but continue further into the pseudoparenchymatous cover tissue. In the higher Dothioraceae, as in Bagnis
. Comparative morphology of Fungi. Fungi. 216 COMPARATIVE MORPHOLOGY OF FUNGI Plectascales, but elongate-clavate; they are pressed together in a palisade and force the stromatic ground tissue, the so-called interthecial stroma (Fig. 139, 2) together to paraphysoid filaments, the pseudoparaphyses or paraphysoids (terminology of Petrak, 1923). The paraphysoids differ from paraphyses in that, as the remains of the interthecial stroma, they have a cellular structure and do not terminate freely but continue further into the pseudoparenchymatous cover tissue. In the higher Dothioraceae, as in Bagnisiopsis, there appears, as in the Myriangiaceae, a tendency to limit the asci to definite, narrowly limited conceptacles which are differentiated out of the interior of the stroma (Fig. 140). The dull black, pulvinate stroma of the Brazilian Bagnisiop- sis peribebuyensis is erumpent from the leaves of various Melastomataceae dotting their surface with small papillae. In contrast to Bagnisiella, the asci do not form a continuous layer but are localized in sharply defined nests which, like the fertile parts of Myriangium, are generally surrounded by a darker tissue. They lie singly (as in Bagnisiella and the other Myriangiales) in special loculi and are separated from each other. Fig. 140.—Bagnisiopsis peribebuyensis. Section of mature stroma with two ascigerous conceptacles. (X 33; Arnaud, 1921.) by thin stromatal layers. With this spatial limitation of the asci, the whole stromatal cover does not degenerate at maturity but small parts, which have lain directly over the conceptacles, crumble and form an irregular pore through which the ascospores escape (Fig. 140, left). During further development of the Dothioraceous line the single conceptacle is gradually individualized. Like the fertile branches of Myriangium, they sprout from the sterile stroma, thereby acquiring their own wall while sterile stroma becomes more and more limited to the intramatrical part. This development m
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