. The structure and development of crown gall : a plant cancer . Daisy XII. Cross section showing abnormal Iignification of cell-walls in the tumor (p. 38). Bui. 255, Bureau of Plant Industry, U. S. Dept. of Agriculture. Plate Daisy XIII. Inoculated plant, showing primary stem tumor and secondary leaf tumors; also section of ster at fig. 2 (p. 39). Bui. 255, Bureau of Plant Industry, U. S. Dept. of Agriculture. Plate Lll. S&& w& ? y/: I: ^J -? wk $^y\ ? Mi. >•: :

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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1912