Apr. 8, 1918 Relation of Soil Fungi to Potato Diseases 99 



(13) Saccardo, p. a. 



1886-190O. SYLLOGE FUNGORUM OMNIUM HUCUSQUE COGNITORUM. V. 4, 1886; 

 14, 1900. Patavii. 



(14) Sherbakoff, C. D. 



1915. FusARiA OF potatoes. N. Y. ComcU Agr. Exp. Sta. Mem. 6, p. 87-270^ 

 51 fig., 7 col. pi. Literature cited, p. 269-270. 



(15) Thom, Charles. 



1915. THE PENICILLIUM LUTEUM-PURPURO-GENUM GROUP. In Mycologia, V. 7, 



no. 3, p. 134-142, I fig- 



(16) and CuRRiE, J. N. 



1916. ASPERGILLUS NIGER GROUP. In Jour. Agr. Research, v. 7, no. i, p. 1-15. 



(17) Werkenthin, F. C. 



1916. fungus FLORA OF TEXAS SOILS. In Phytopathology, v. 6, no. 3, p. 241- 



253. I fig- 



(18) Wilcox, E. M., Link, G. K. K., and Pool, V. W. 



1913. A DRY ROT OF THE IRISH POTATO TUBER. Nebr. Agr. Exp. Sta. Research 

 Bui. I, 88 p., 15 fig., 28 pi. (i col.) Bibliography, p. 85-88. 



(19) wollenweber, h. w. 



1913. ramularia, mycosphaerella, nectria, calonectria. eine morpho- 

 logisch pathologische studie zur abgrenzung von PILZGRUPPEN 



MIT CYLINDRISCHEN UND SICHELFORMIGEN KONIDIENFORMEN. In 



Phytopathology, v. 3, no. 4, p. 197-242, pi. 20-22. Literaturver- 

 zeichnis, p. 239-240. 

 (30) 



(31)- 



1913. STUDIES ON THE Fusarium PROBLEM. In Phj^pathology, V. 3, no. i. 

 p. 24-50, I fig., pi. 5. Literature, p. 46-48. 



1914. IDENTIFICATION OP SPECIES OF FUSARIUM OCCURRING ON THE SWEET 



POTATO, ipomoea BATATAS. In Jour. Agr. Research, v. 2, no. 4, p. 251- 

 286, pi. 12-16. Literature cited, p. 284-285. 



(22) 



1917. FUSARIA autographice delineata. In Ann. Mycol., v. 15, no. K. 

 p. 1-56. Index to series of drawings filed in U. S. Dept. Agr. Bur. 

 Plant Indus., Office of Cotton and Truck Disease Investigations. 



EXPLANATION OF PLATES A AND B 



Plates A and B are reproductions of water-color drawings of cultures grown in the 

 light at ordinary room temperatures, ranging from 16° to 26° C, in the laboratories of 

 the U. S. Department of Agriculture at Washington, D. C. When grown under similar 

 conditions in the arid West, the colors are often not so pronounced, owing probably 

 to the earlier drying out of the media. It has also been noted that, when the cultures 

 are grown at temperatures ranging from 30° to 42° C, the normal shades of red may be 

 entirely wanting and in their stead dirty yellows and browns may appear. In text 

 figiu-es I and 2 attempt has been made to reproduce typical conidial and other spore 

 forms by which the fungi might be identified at any stage of their growth on any of the 

 media employed, such as steamed rice, steamed-potato plugs, steamed melilotus stems, 

 Irish potato agar with 10 per cent of glucose added, and string-bean agar. 



