. Botany for high schools. Botany. FUNGI: THE RUST FUNGI 287 was always more badly rusted on the leeward side of barberry bushes. As early as 1760 laws were passed in Massachusetts requiring barberry bushes to be destroyed. A little later a Swedish schoolmaster, Schoeler (in 1816), carried barberry leaves with the cluster cups into a rye field and rubbed the leaves on to the rye, so that he could see the masses of yellow cluster-cup spores on the rye leaves. These rye plants became badly infected, while the remaining plants around them remained healthy. Finally, *n 1864-5, de Bary, a celebrate
. Botany for high schools. Botany. FUNGI: THE RUST FUNGI 287 was always more badly rusted on the leeward side of barberry bushes. As early as 1760 laws were passed in Massachusetts requiring barberry bushes to be destroyed. A little later a Swedish schoolmaster, Schoeler (in 1816), carried barberry leaves with the cluster cups into a rye field and rubbed the leaves on to the rye, so that he could see the masses of yellow cluster-cup spores on the rye leaves. These rye plants became badly infected, while the remaining plants around them remained healthy. Finally, *n 1864-5, de Bary, a celebrated German botanist, demonstrated. O.^ Fig. 263. Cedar apples, the winter condition. Abnormal growth of the cedar caused by a fungus (Gymnosporangium macropus). The masses of spores ready to ooze out are in the Uttle pits with the conical elevations. by experimental studies the connection of the cluster cup on bar- berry with the uredo and teleutospores on wheat, his investiga- tions undoubtedly being stimulated by those of a renowned French botanist, Tulasne, who had previously shown the connection of the uredo and teleuto stages. These studies have since been verified, both in Europe and in the United States, in regions where the barberry grows. 454. Other grain rusts.—^There are a number of other rusts which attack w^heat and other cereals. One of the most destruc- tive of these in this country is Piiccinia ruhigo-vera. In some regions in the United States this rust is more abundant and does more injury to the wheat than the Piiccinia 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 Atkinson, George Francis, 1854-1918. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1910
