. Comparative morphology of Fungi. Fungi. Fig. 184.—Diatrypc disciformis. 1. Section of fundament of ectostroma. Above the peridium, Per; in the middle ectostroma, Ect, and below the bark parenchyma, Rp. 2. Older stage. The central portion of the ectostroma is already verruciform while the peripheral portion (right) is still forming conidia. Kon, conidial stroma. 3. Section through ectostroma and entostroma, the latter has already formed perithecia. 4. Dia- grammatic section through a mature fructification. The ectostroma, Ect, has already separated; PI, placodium. (1, 3 X 400, 2 X 270; after
. Comparative morphology of Fungi. Fungi. Fig. 184.—Diatrypc disciformis. 1. Section of fundament of ectostroma. Above the peridium, Per; in the middle ectostroma, Ect, and below the bark parenchyma, Rp. 2. Older stage. The central portion of the ectostroma is already verruciform while the peripheral portion (right) is still forming conidia. Kon, conidial stroma. 3. Section through ectostroma and entostroma, the latter has already formed perithecia. 4. Dia- grammatic section through a mature fructification. The ectostroma, Ect, has already separated; PI, placodium. (1, 3 X 400, 2 X 270; after Ruhland, 1900.) ogyne (Fig. 184, 3), from which the ascogenous hyphae are formed in an unknown manner. The distal outer layer of the entostroma subsequently changes into a horny sclerotic rind which is only interrupted by the perithecial necks. Thereby the connection with the ectostroma is loosened, the latter is thrown off, and the mature perithecial entostroma lies free in the ruptured periderm. This horny, sclerotic rind layer, surrounding the perithecial mouths, is called a shield or placodium (Fig. 184, 4). One of the causes of great confusion in the systematic literature of the Sphaeriales is that the development of the stroma in the higher forms. 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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