. The fungi which cause plant disease . Plant diseases; Fungi. 496 THE FUNGT WHICH CAUSE PLANT DISEASE Asteroma De Candolle (p. 482) Pycnidia very small, globose, erumpent, often on a mass of hyphae; conidia ovate or short cylindric. In part =Gnomonia. See p' 274. About forty species chiefly parasitic. A. padi (D. C.) Grev. on Prunus=Gnomonia padicola. See p. 275. A. geographicum (D. C.) Desm. occurs on various species of Pomaceae; A. punctiforme Berk, on the rose; A. stuhlmanni Hen. on bananas and pineapples in Africa. A. codisei All. is said to be a serious parasite of Codiseum.^^ Vermicular

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. The fungi which cause plant disease . Plant diseases; Fungi. 496 THE FUNGT WHICH CAUSE PLANT DISEASE Asteroma De Candolle (p. 482) Pycnidia very small, globose, erumpent, often on a mass of hyphae; conidia ovate or short cylindric. In part =Gnomonia. See p' 274. About forty species chiefly parasitic. A. padi (D. C.) Grev. on Prunus=Gnomonia padicola. See p. 275. A. geographicum (D. C.) Desm. occurs on various species of Pomaceae; A. punctiforme Berk, on the rose; A. stuhlmanni Hen. on bananas and pineapples in Africa. A. codisei All. is said to be a serious parasite of Codiseum.^^ Vermicularia Fries (p. 482) Pycnidia superficial, or erumpent, globose depressed, to globose clavate, leathery or carbonous, black, ostiolate or not, beset with rather long, stiff, septate, dark colored bristles; conidia cylindric-fusoid, often curved. Some one hundred thirty species, chiefly saprophjrtes. V. dematium (Pers.) Fr. Pycnidia erumpent, superficial, 80-120 /!> conic, then depressed, often confluent, black, spines pale at the ends, 150-200 x 5 m; conidia cylindric-elongate, 20 x HSV** 4-^ M, apically rounded, curved. Fio. 341.—V. dematium. c, a nearly Commonly a saprophyte, this rhypiue.'""Ai^'R^k ^' '^°""' ^™S^ Occasionally causes as- paragus disease.*^ In Europe it is reported as the cause of much loss to the ginseng crop. On this plant it produces a stem anthracnose. The fungus was isolated and its cultural characters studied by Reed.** V. trichella Fr. Pycnidia ovate, small, black, spines long, at the apex of the pycnidium; conidia fusoid, curved, pointed, 16-25 x 4-5 /x.. 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.. Stevens, Frank Lincoln, 1871-1934. New York : Macmillan