. 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. 392 UREDIXEAE. than those of G. tramiloides. The aecidiospores—Boestelia cormcta—occur on species of Pyrus (Sorbus); they are much smaller than those of Boestelia pciiicillata. The Boestelia themselves are long, curved, and horn-like, while the walls of the peridial cells are beset with short processes (Fig. 224). Where Pi/rns AuciqMria occurs mixed with Pyrus Malus, it has been observed that B
. 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. 392 UREDIXEAE. than those of G. tramiloides. The aecidiospores—Boestelia cormcta—occur on species of Pyrus (Sorbus); they are much smaller than those of Boestelia pciiicillata. The Boestelia themselves are long, curved, and horn-like, while the walls of the peridial cells are beset with short processes (Fig. 224). Where Pi/rns AuciqMria occurs mixed with Pyrus Malus, it has been observed that Boestelia cornuta is confined to the former species exclusively. The Boestelia is the cause of a. Pig. 225.—Gymtwsporangium juniperinum and G. trcmelloides. 1, Young spore- cushions breaking through the bark ; 2, the same in swollen condition ; 3, gela- tinoiis cushion arranged to show its lower surface ; U, Juniper-needle with three spore-cushions ; 5, young Juniper plant bearing cushions on its needles ; G to 10, spores of various kinds, to show the variation in size, shape, and thickness of wall; 11, cell of a prumycelium -with a sporidium attached ; 13, germinating sporidium. (After Tubeuf.) marked deformation of leaves, petioles, and even (though rarer) fruits of Pyrus Aucujiaria and Aronia rotundifolia, both in the lowlands and mountains. I have produced Boestelia cornuta on Pyrus Aucujjariet by artificial infection with portions of spore-cushions from twigs of juniper, and have observed a mountain ash in closed forest, with abundant Boestelia, directly beneath an overhanging juniper with diseased 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
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectparasit, bookyear1897
