. Comparative morphology of Fungi. Fungi. Fig. 152.—Calonectria erubescens. A. Ascospores ( X 750). B. Mature perithecium with subiculum (X 140). C. Mature asci (X 400). (After Weese, 1914.) nivale), the "snow mould" chiefly on rye, causes a wad-like covering and death of seedlings; furthermore in damp summers it appears at the base of the stems and causes a foot rot of grain (Schaffnit, 1912, 1913). Gibber- ella Saubinetii (Botryosphaeria Saubinelii according to the nomenclature of Weese 1919) causes foot disease and scab of small grains; Pleonectria berolinensis causes the death of

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. Comparative morphology of Fungi. Fungi. Fig. 152.—Calonectria erubescens. A. Ascospores ( X 750). B. Mature perithecium with subiculum (X 140). C. Mature asci (X 400). (After Weese, 1914.) nivale), the "snow mould" chiefly on rye, causes a wad-like covering and death of seedlings; furthermore in damp summers it appears at the base of the stems and causes a foot rot of grain (Schaffnit, 1912, 1913). Gibber- ella Saubinetii (Botryosphaeria Saubinelii according to the nomenclature of Weese 1919) causes foot disease and scab of small grains; Pleonectria berolinensis causes the death of Ribes. Hypomyces differs from the four previous genera in the extensive development of gemmae. It is chiefly parasitic on agarics and forms a stroma on the underside. The infection is generally visible by the appearance of a fine, arachnoid mycelium whose hyphae cut off acroge- nously fine, hyaline, generally unicellular conidia; in this stage, the fungi in question have been assigned to various imperfect genera, as Verticillium, Botrytis and Sporotrichum. Later there appear on the same hyphae, thick-walled, often sulptured gemmae. These two forms were earlier regarded as independent species and assigned to Sepedonium, Mycogone, . 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 work.. Gäumann, Ernst Albert, 1893-1963; Dodge, Carroll William, 1895-. New York [etc. ] McGraw-Hill Book Company, Inc.