. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. 390 UREDINEAE. In ]\Iay or June the cushions swell up and become large brownish-yellow gelatinous clumps, dotted over with dark points, the teleutospores. Promycelia arise from one or more germ- pores in each spore, and give off basidia with sporidia (basidio- HJ^>, /^ I. Fio. 224.—Accklia and Piiniidia of various species of GyninoKporanyhim : G. tremelloides—1 and i', aecidia on leaf of Pi/rus Aria ; 5 and
. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. 390 UREDINEAE. In ]\Iay or June the cushions swell up and become large brownish-yellow gelatinous clumps, dotted over with dark points, the teleutospores. Promycelia arise from one or more germ- pores in each spore, and give off basidia with sporidia (basidio- HJ^>, /^ I. Fio. 224.—Accklia and Piiniidia of various species of GyninoKporanyhim : G. tremelloides—1 and i', aecidia on leaf of Pi/rus Aria ; 5 and 6, aecidia on leaf of Pyras Malus; 10 and 20, portions of the peridiuin of an aecidium from ii, showing the peculiar articulation of the cells. G. juniperiiium—3 and U, aecidia on Pyrus Aucuparia; 7 and S. aecidia on Amelanchier vulgaris. 0. clavariaeforme—9 10, aecidia on Pyius latifolia; 11, 12, and Hi, aecidia on Crataegus Oxyacanlha, grown out-of-doors; 7/,, the same aecidia, enlarged ; , I'l, and 17, aecidia on Crataegus Oxyacanlha, indoor culture; IS, deformed twig of Crataegus bearing pycnidia. (After Tubeuf.) spores) capable of immediate germination. The gelatinous mass dries up from time to time, leaving a bright yellow scar on the swollen part of the host-branch. The sporidia germinate most easily on species of Sorbiis (Fi/r/'s). Infections with. 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.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
