. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. CRYPTOMYCES. 247 especially Salve mcana, but also on S. 2^urpurca. When the black apothecial cushions break out through the bark, the twigs of the host-plant are frequently still green and leaf-clad. The apothecia originate in the lower bark and so loosen the epidermal layers as to cause the appearance of yellow spots. Black centres appear in the spots, due to the formation of a. Fig. 132.—Cryptomyccs maximus. 1, Cros
. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. CRYPTOMYCES. 247 especially Salve mcana, but also on S. 2^urpurca. When the black apothecial cushions break out through the bark, the twigs of the host-plant are frequently still green and leaf-clad. The apothecia originate in the lower bark and so loosen the epidermal layers as to cause the appearance of yellow spots. Black centres appear in the spots, due to the formation of a. Fig. 132.—Cryptomyccs maximus. 1, Cross-section of a twig of SalLr incano, with stroma a b ; the mycelium occupies the rind and bast into the cambium, so that a wood-ring for the current year has been only partially developed; the shaded part between a and h is an aerating tissue, formed of loose hyphae, which, with a, forms the stroma proper; h, the ascogenous layer. (Lens-magnification.) 2, Asci, showing a dry ascus; one to which water has been added, so that it is elongating ; one ruptured and ejaculating spores. 3, Young stromata in spring, still covered by the epidermis of the Salix. 4, Willow twig after det-ichment of the patches of Crypiomyces in autumn, (v. Tubeuf del.) black apothecial cover underneath the epidermis. On rupture of the epidermis, black apothecial cushions emerge and cover large areas of the living twigs. Eain causes the apothecia to become gelatinous, and to swell considerably; on drying the cushions roll up and fall off, leaving scars in the bark (Figs. 132, 4).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Tubeuf, Karl, freiherr von, 1862-; Smith, William G. London, New York [etc. ] Longmans, Green & co.
Size: 1450px × 1723px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
