Diseases of plants induced by Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith diseasesofplants00tubeuoft Year: 1897 224 ASCOMYCETES. rupture of the epidermis. Xuinerous leaves may be diseased and each carry many cushions, yet Yuillemin, who described the disease, does not believe the host-plant is affected to any serious degree. M. (Gnom.) coryli Batsch. (Britain and America). The black struniata are found in withered spots on the leaves of hazel {Corylus); as a rule, ea
Diseases of plants induced by Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith diseasesofplants00tubeuoft Year: 1897 224 ASCOMYCETES. rupture of the epidermis. Xuinerous leaves may be diseased and each carry many cushions, yet Yuillemin, who described the disease, does not believe the host-plant is affected to any serious degree. M. (Gnom.) coryli Batsch. (Britain and America). The black struniata are found in withered spots on the leaves of hazel {Corylus); as a rule, each stroma carries oidy one peri- thecium witli a lon- beak similar to that of M. fimhriaf'. Fio. 108.—Mamiana fimhriata on Carpinus Bclulas. Leaf of Hornbeam seen on lower surface. Stroma (enlarged), with the long black necks of the perithecia projecting from the ruptured leaf-epidermis, (v. Tubeuf del.) Valsa. A stroma is generally present, but is of very variable appear- ance ; embedded in it are the perithecia, with only their beak- like mouths projecting. The spores are hyaline or light-brown, unicellular, and generally bent. Xo paraphyses are present. Valsa oxystoma This causes disease and death of branches of A/iws 'cirulis in the Alps. The symptoms are withering and drying up of single branches on an otherwise green bush. This disease causes severe loss in the Tvrol, Titres et (ravanx scientifiqnes, 1890. -V. Tubeuf. 'Zwei Feinde d. Alpenerle,' For-stlicli-iia/unciss. Ztilschrijt, 1S92.
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