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 !50 ASCOMYCETES. Scleroderris. A black stroma is formed in the bark of twigs attacked by this fungus, and thence the apothecia break out in great numbers, at first as closed spheres, later as stalked open cups with finely lobed rims. The asci are cylindrical or club- Fio. 134.—HcUroderris fiUiginosa on living twig of Salix alba. A, Three apothecia, two in section, the third seen from above, showin
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 !50 ASCOMYCETES. Scleroderris. A black stroma is formed in the bark of twigs attacked by this fungus, and thence the apothecia break out in great numbers, at first as closed spheres, later as stalked open cups with finely lobed rims. The asci are cylindrical or club- Fio. 134.—HcUroderris fiUiginosa on living twig of Salix alba. A, Three apothecia, two in section, the third seen from above, showing the cross-like fissure. B, Sections of diseased branches, whose growth has been arrested in the shaded parts ; on the dead bark apothecia are present. (', Asci, spores and paraphyses. (v. Tubeiif del.) Fic. -Scleroderris full- qiHosa on living twig of Salix Caprea. (v. Tnbeuf del.) shaped, and contain eight colourless spores which are club- shaped, needle-shaped, or thread-like, and divided by septa into four to eight cells. The pores of the asci are coloured blue by iodine. The paraphyses are thread-like.
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