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 GYMNOSPORANGIUM. 399 of the spot in question is either completely destroyed or tiaus- formed into irregular cells, separated by intercellular spaces. The anatomical changes in swellings (Fig. 235) induced by (t. sdhinae on JunijHrus Sahina were investigated by Woernle with the following results. Wood, bust, and rind are increased round the whole circumference of
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 GYMNOSPORANGIUM. 399 of the spot in question is either completely destroyed or tiaus- formed into irregular cells, separated by intercellular spaces. The anatomical changes in swellings (Fig. 235) induced by (t. sdhinae on JunijHrus Sahina were investigated by Woernle with the following results. Wood, bust, and rind are increased round the whole circumference of the stem. Along with the broadening of the year-rings, however, there occurs a change in the structure of the diseased wood. The same Fir,. 234.—A few leaves enlarged from Fig. 233. Tlie leaf t« left bears pycnidia on red ti\>otti on the upper surface of the Iciif; the remaining Icjives boar aecidia on raised portions of their surface. Several aecidia still further enlarged show the peridia dehiscing by longitudinal slits, (v. Tul>euf del.) occur in tlie year-rings as already described fur (;. dacariarfonne, viz. thickened twisted , locsely connected together and with fissure-like ])its; medullary rays more numerous and Ijroader; the hmits of the year-ring diflicult to distinguisli: and a yellow pigment deposited in the walls of all the A of nature may be found round the whole circumference of a twig even in ibe first year after infecti(jn, and regularly each succeeding year. Woernle only rarely found zones of irregular cell-formation like those
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