312 INDEX TO AMERICAN BOTANICAL LITERATURE 
Winston, J. R. Commercial control of citrus scab. U.S. Leer 
Agr. 215; 3-8. 15 F 1922 
Wolf, F. A., & Shunk, I.V. Tolerance to acids of certain bac- 
terical plant pathogenes. Phytopathology 11: 244-250. 
21 O-1621. 
Woodcock, E. F., & Zeeuw, R.de. The anatomy of the haustor- 
ial roots of Comandra. Michigan Acad. Sci. Rep. 22: 189- 
192. pl. 15. Au 1g2t. 
Wright, W. G. Research work of the Dominion Forest Service. 
Jour. For. 20: 62-66. Ja 1922. 
Young, H. C., & Bennett,C. W. Studies in parasitism I.- Toxic 
substances produced by fungi. Michigan Acad. Sci. Rep. 
22: 205-208. Au 1921. 
Yuncker, T.G. A list of Indiana mosses. Proc. Indiana Acad. 
Sci. 1920: 231-242. 1921. 
Yuncker, T. G. A species of Cuscuta not hitherto reported 
from Indiana. Proc. Indiana Acad. Sci. 1920: 229. 1921. 
Soret erie Neue Flechten—IX. Myc. 19: 224-242. 1921. 
udes new species in Opegrapha (2), Graphis (1), Graphina (3), En- 
jeteates (1). 
Zahn, K. H. Compositae—Hieracium. Pflanzenreich IV. 
280. 1-864. 180 Ig2t. 
Zavitz, E. J. Reforestation in Ontario. Jour. For. 20: 18-24. 
Ja 1922. 
Zeller, S. M., & Owens, C. E. European canker on the Pacific 
slope. Phytopathology 11: 464-468. f. 1-3. 25 F 1922. 
Zeman, V. Los hongos de la “Phalaris bulbosa."’ Revista 
Facult. Agron. 14: 179-184. 1921. 
Zeman, V. Bacteriosis del bananero (una nueva enfermedad). 
Revista Facult. Agron. Univ. Nac. La Plata 14: 17-30. 1921. 
[Lllust.} 
Zundel. G. L. The effects of treatment for bunt on the ger- 
mination of wheat. Phytopathology 11: 469-484. f. 1, 2 
21 Mr 1922. 
