346 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
* 
of Ustilago nuda has been reported by Kellerman and Swingle, and 
others. Literature : 18, 19, 22, 28, 27, 84, 88, 89, 94. 
Ustilago Tritici (Pers.) Jens. 
? Lycoperdon Tritici Bjerk., Act. Suec. Ann., 326. 1775. p.p. 
Uredo segetum p Tritici Pers., Disp. Meth. Fung., 57. 1797. 
Uredo carbo DC., FI. Fr., 6 : 76. 1815. p. p. 
Ustilago segetum Ditm., Sturm’s Deutscli. FI., in, 1: 67. 1817. p. p. 
Caeoma segetum Lk., Sp. PL, 6 2 : 1. 1825. 
Erysibe vera p Tritici Wallr., FI. Crypt. Germ., 2 : 217. 1833. 
Uredo Carbo-Tritici Philipp., Traite Carie Charb., 92 : pi. 4. 1837. 
Ustilago Carbo y vulgaris a Triticea Tul., Ann. Sci. Nat., Bot., in, 7 : 
80. 1847. 
Ustilago Hordei Bref., Nacli. Klub. Lanclw. Berk, 1593. 1888. p. p. 
Ustilago segetum var. Tritici Jens., Om Korns. Brand., 61. 1888. 
Ustilago Tritici Jens., Ann. Rep. Kans. Agr. Exp. Sta., 2 : 262. 1890. 
Ustilago Tritici Rostr., Overs. Kong. Danske Vid. Selsk. Forh., 15. 
Mr. 1890. 
Ustilago Tritici f. folicola P. Henn., Zeitschr. Pflanzenk., 4 : 139. 1894. 
Ustilagidium Tritici Herzb., Zopf Beit. Phys. Morph. Org., 5: 7. 1895. 
Exsiccati: Ustilago segetum (Bull.) Ditm., on wheat, Und. & Cook, 
Illustr. Fungi, 56 ; Ustilago Tritici (Pers.) Jens., on Triticum vulgare, 
Seym. & Earle, Econ. Fungi, 80, Ell. & Ev., Fungi Col., 1369, Syd., Ust., 
167, Kell., Ohio Fungi, 42, Griff., West. Amer. Fungi, 22. 
Sori in spikelets, forming a dusty olive brown spore mass, about 
8-12 mm. long by half as wide, usually entirely destroying floral 
parts and eventually becoming dissipated and leaving behind only 
the naked rliachis; spores lighter colored on one side, usually 
subsplierical to spherical, occasionally more elongated, minutely 
echinulate especially on lighter side, 5-9 /x in length. 
Host: Triticum vulgare, Ala., Ia., Ida., Ill., Ind., Ivans., Mass., 
Mich., Minn., Mo., Neb., N. Car., N. Dak., N. J., N. Y., Ohio, S. 
Dak., Tenn., Tex., Vt., Wash., Wise., W. Va., Wyo.; Mex. 
Lycoperdon Tritici of Bjerkander is regarded by some botanists 
as including the species described here as well as Tilletia Tritici , 
while others regard it as relating only to this latter species. Usti¬ 
lago Tritici is one of our common smuts, often doing considerable 
damage to the wheat crop. Selby of Ohio has shown that it can 
be prevented by a modified form of the hot water treatment. Its 
germination has been reported by Kellerman and Swingle, as well 
as by others. Literature: 5, 6, 9, 17, 18, 23, 27, 84, 88, 89, 94, 98, 
137. 
