Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplants00tube Year: 1897 UROMYCES. 335 epidermis are reduced in number; intercellular spaces are formed in the normally compact palisade parenchyma, and its cells become shorter and broader, while those of the spongy paren- chyma are increased both in size and number; the fibro-vascular bundles remain unchanged, although the cells surrounding them may be more or less abnormal. Where thickening of the stem takes place, it is
Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplants00tube Year: 1897 UROMYCES. 335 epidermis are reduced in number; intercellular spaces are formed in the normally compact palisade parenchyma, and its cells become shorter and broader, while those of the spongy paren- chyma are increased both in size and number; the fibro-vascular bundles remain unchanged, although the cells surrounding them may be more or less abnormal. Where thickening of the stem takes place, it is chiefly due to multiplication of the cells of Fio. ISO. —Uroiwjces pisi. Comparison of healthy flowu , with a much-elongated, non-flowcriug plant rust. (v. Tubeuf phot.) cortex and pith, while at the same time those of tlie cortical parenchyma become somewhat enlarged and altered in shape; the woody portion is less developed than normally; and laticiferous tubes are neither so large nor so conspicuous as usual. The aecidia of this species are found only on the lower surface of the leaf; they are saucer-shaped, and have a broad lobed white margin.
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