. Fig. 212. ^ Gall produced by Cronartium (Perider- mium) cerebrum on pine. After Hedgcock. profusion of orange-colored spores each spring. Chiefly by its interference with the sap current the swellings bring about the death of many trees. The galls are perennial and may

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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1921