. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 1.—A 6-Year-0ld Jack Pine In- fected WITH PERIDERMIUM CEREBRUM. The complete girdling of the main stem by two oppositely arranged galls is shown. Note the wedge-shaped gall tissues. Fiq. 2.—Four-Year-Old Seedlings of Jack Pine, Showing the Char- acteristic Swellings of Perider- mium Cerebrum. The entire crown of the seedlings develops into spherical Fig. 3.—Various Types of Infection of Young Jack Pine by Peri- dermium comptoniae. Note that in the central figure the fungus has invaded the underground tiss
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 1.—A 6-Year-0ld Jack Pine In- fected WITH PERIDERMIUM CEREBRUM. The complete girdling of the main stem by two oppositely arranged galls is shown. Note the wedge-shaped gall tissues. Fiq. 2.—Four-Year-Old Seedlings of Jack Pine, Showing the Char- acteristic Swellings of Perider- mium Cerebrum. The entire crown of the seedlings develops into spherical Fig. 3.—Various Types of Infection of Young Jack Pine by Peri- dermium comptoniae. Note that in the central figure the fungus has invaded the underground tissues of the 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, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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