. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. 247, U. S. Dept. of Agriculture Plate /ECIOSPORES OF CRONARTIUM PYRIFORME AND A "I WIQ OF PlNUS CONTORTA. Fig. 1.—iEciospores of Oronartium pyriforme, from the type specimen on Pinus sp. at Albany, N. Y. (Microphotograph.) Fig. 2.—iEciospores of Cronartmm pyriforme from Pinus pun- gens, collected near Greenwood Furnace, Pa. (Microphotograph.) These closely resemble the type. Fig. 3.—iEciospores of Cronartium pyriforme from Pinus contorta, near Eldorado Springs, Colo., from t
. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. 247, U. S. Dept. of Agriculture Plate /ECIOSPORES OF CRONARTIUM PYRIFORME AND A "I WIQ OF PlNUS CONTORTA. Fig. 1.—iEciospores of Oronartium pyriforme, from the type specimen on Pinus sp. at Albany, N. Y. (Microphotograph.) Fig. 2.—iEciospores of Cronartmm pyriforme from Pinus pun- gens, collected near Greenwood Furnace, Pa. (Microphotograph.) These closely resemble the type. Fig. 3.—iEciospores of Cronartium pyriforme from Pinus contorta, near Eldorado Springs, Colo., from the same tree as the type of Pcridermium betheli (microphotograph), showing the variation in the shape of the spores on this pine from those of the type specimen in figure 1. Fig. 4.—A twig of Pinus contorta, showing the secia and peridia of the fungus Peridermium pyriforme (P. betheli) on a slightly swollen portion. (About natural size.). 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 United States. Dept. of Agriculture. [Washington : U. S. Dept. of Agriculture]
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