LITERATURE CITED
- Christensen, J. J. 1931. Studies on the genetics of Ustilago zeae. Phytopath. Ztschr. 4: 129–188.
- Fischer, G. W. 1953. Manual of the North American smut fungi, xii + 343 pp. The Ronald Press Co., New York.
- Fischer, G. W. and Elisa Hirschhorn. 1945. The Ustilaginales or “Smuts” of Washington. Wash. Agr. Expt. Sta. Bull. No. 459, 84 pp.
- Holton, C. S. 1951. Methods and results of studies on heterothallism and hybridization in Tilletia caries and T. foetida. Phytopathology 41: 511–521.
- Holton, C. S.. 1953. Tilletia elymi, an apparently homothallic species. Phytopathology 42: 635–636.
- Holton, C. S. and F. D. Heald. 1941. Bunt or stinking smut of wheat, ii + 211 pp. Burgess Publishing Co., Minneapolis, Minn.
- Holton, C. S. and F. D. Heald and W. N. Siang. 1953. Spore germination in Tilletia asperifolia, a species unique to the genus. Phytopathology 43: 219–220.
- Holton, C. S. and F. D. Heald and W. N. Siang, R. H. Bamberg and R. W. Woodward. 1949. Progress in the study of dwarf bunt of winter wheat in the Pacific Northwest. Phytopathology 39: 986–1000.
- Liro, J. I. 1938. Die Ustilagineen Finnlands II. Ann. Acad. Scient. Fenn., Ser. A. 42: xiii + 720 pp.