. Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith. Plant diseases; Parasitic plants. 390 UREDINEAE. In May 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-. FiG. —Aei-idia and Pi/cnidia of various species of Gymnonporangiurii: G. iremelloides—1 and ;?, aecidia on leaf of Pyrus Aria ; 5 an
. Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith. Plant diseases; Parasitic plants. 390 UREDINEAE. In May 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-. FiG. —Aei-idia and Pi/cnidia of various species of Gymnonporangiurii: G. iremelloides—1 and ;?, aecidia on leaf of Pyrus Aria ; 5 and 6, aecidia on leaf of MaAus; 19 and 20, portions of the peridium of an aecidium from 5, showing the peculiar articulation of the cells. 6. juniperinuM—3 and U, aecidia on Pyrus Aucuparia ; 7 and S, aecidia on Amelanchier vulgaris. G. clavariaeforme—9 and 10, aecidia on Pyius latifolia; 11, 12, and IG, aecidia on Oxyacautka, grown out-of-doors; lU, the same aecidia, enlarged ; 1-1, I'l, and 17, aecidia on Crataegus Oxyacanthn, indoor culture ; 18, 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 Sorhns (P//ri(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-. London Longman's, Green
Size: 1480px × 1687px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectparasit, bookyear1897
