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 POLYPORUS. 445 surface, and a smooth yellowisli liyinenial siiiface. Tliey are large and Jiat, the thickest part being at their insertion (Fig. 277). Several frequently occur on the same stem, especially if wounds or frost injuries are present. The spores are brown and roundish. Conidia are said, by Schroeter, to be formed on the upper surface of the sporophores
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 POLYPORUS. 445 surface, and a smooth yellowisli liyinenial siiiface. Tliey are large and Jiat, the thickest part being at their insertion (Fig. 277). Several frequently occur on the same stem, especially if wounds or frost injuries are present. The spores are brown and roundish. Conidia are said, by Schroeter, to be formed on the upper surface of the sporophores. This species is a deadly enemy of fruit-trees, especially apple. In the vicinity of Munich the sporophores are common on ash. Schroeter gives elm and plane as hosts, and Prillieux Kio. 277.—totyporus hi»pidii». longiludinal section through a living stem of A»h, and a sporophore of P. hiijiidvu. Tlie stem shows symjitoms of wood- flcstniction, in that it Itecomes brown antl has sliort white lungltiuiinal and radial stripes, (v. Tubeuf phot.) and state the fungus to be very dangerous to the mulberry in France. It causes brown discoluraliuu nt' tluj wuuti accoiiiiiaiiii'd liy characteristic short white lines in both radial and vcrtiial dircciidiis. so that tlif wiiod liccniin'S nuirkeil out in s(juart's. Polyporus (Poria) laevigatus Spuiojjhnres dark-bntwn ' I'rillieiix tJin/l'l. <h In Sor. //lyro/o;/. ./. Fniiir,, IV., Isii;}), gives ilcUils of the WfHtiiictiriii ntni/l>/<if', \ix., IHSJ.
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