. V«- Fig. 131.—I X, Pyrenochacta phloxidis, section of phlox stem showing two perithccia, mag. ; 2 x, spores of same, mag. ; i xx. Phleospora oxyacanthi, on hawthorn leaf; 2 xx, section of spore- bed of same, mag. ; 3 xx, spores of same, highly mag. ; i xxx, Coniothyrium hellebori, on leaf of black hellebore; 2 xxx, spores of same, highly mag. cankered appearance, which results in the death of the stem attacked. The leaves turn yellow and drop off, followed by the breaking of the stem near the base. The minute, black,

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Keywords: ., bookpublishernewyorkmacmillan, booksubjectplantdis, bookyear1910