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[161] Arthur, J. C. Plum Leaf Fungus N. Y. Sta. An. Rpt. 5:276-281, Pls. 6-10. 1887.

[162] Duggar, B. M. Fungous Diseases of Plants 314, figs. 147, 148. 1909. Pierce, N. B. A Disease of Almond Trees Jour. Myc. 7:66-67, Pls. 11-14. 1892.

[163] Scribner, F. L. Leaf Rust of the Cherry, etc. U. S. Dept. Agr. Rpt. 353-355. Pl. 3. 1887. Hedrick, U. P. Prune Rust Oreg. Sta. Bul. 45:67. 1897.

[164] Stewart, F. C. N. Y. Sta. Bul. 191:323-324. 1900. Rolfs, F. M. Die Back of Peach Trees Science 26:87. 1907.

[165] Duggar, B. M. Fungous Diseases of Plants 226. 1909.

[166] Smith, E. F. and Townsend, C. O. A Plant Tumor of Bacterial Origin Science 25:671-673. 1907. Toumey, J. W. Cause and Nature of Crown Gall Ariz. Sta. Bul. 33:1-64, figs. 1-31. 1900. Hedgcock, G. C. Crown Gall, etc. U. S. Dept. Agr. Bur. Pl. Ind. Bul. 90:15-17, Pls. 3-5. 1906.

[167] Smith, E. F. Science 17:456-7. 1903. Ibid. 21:502. 1905. Clinton, G. P. Report of Botanist Conn. Sta. Rpt. 273. 1905.

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[169] Stewart, F. C. N. Y. Sta. Bul. 191:324-326. 1900.