CLINTON: NORTH AMERICAN USTILAGINEAE. 
363 
C 98, C 99, C 100, on Euchlaena luxurians, Seym. & Earle, Econ. Fungi 
Clinton Ust. Supp., C 97 ) Ustilago Zeae Mays (DC.) Wint., on Euchlaena 
luxurians, Kell. & Sw., Ivans. Fungi, 25. 
Sori on any jiart of the host, usually prominent, forming irregular 
swellings from a few mm. to over a dcm. in diameter, at first pro¬ 
tected by a sort of false white membrane composed of plant cells and 
semi-gelatinized fungous threads, soon rupturing and disclosing red¬ 
dish brown spore mass ; spores ellipsoidal to spherical or rarely more 
irregular, prominently though rather bluntly echinulate, 8-11 p,, most 
elongated 15 /a, in length. 
Hosts: Euchlaena luxurians , Ala.. Conn., Ia., Ill., Kan., Wise. ; 
Zea Mays , Ala., Calif., Conn., D. C., Ga., Ia., Ill., Ind., Ivans., Mass., 
Md., Me., Mich., Minn., Miss., Mo., Neb., N. Car., N. J., N. Y., 
Ohio, Okl., Penn., R. I., S. Car., S. Dak., Tex., Vt., Wise., W. Ya. ; 
Mex.; Ont. 
This is one of the most common and widely distributed of the 
smuts. It sometimes causes considerable injury to the corn crop. 
As the smut gains entrance into the host through any very young 
tissue, it cannot be prevented by seed treatment. The yeast-like 
sporidia propagate in manure and this, especially when fresh, if 
applied to the land is likely to increase the amount of smut. The 
form on Euchlaena is the same as that on Zea, as shown by an exam¬ 
ination of the type in Erb. Critt. I tab, n, 1152. The germination 
of the smut has been reported by a number of botanists, including 
Kuhn, Wolff, Brefeld, Norton, and Clinton. Literature : 10,14, 20, 
22, 27, 44, 75, 85, 97, 100, 103, 121, 129, 132, 144, 165, 172, 192, 
202 . 
Ustilago Panici-glauci (Wallr.) Wint. 
Uredo decipiens a graminum Strauss, Ann. Wett. Ges., 2 : 111. 1811. p. p. 
Erysibe Panicorum a Panici-glauci Wallr., FI. Crypt Germ., 2 : 216. 1833. 
Ustilago neglecta Niessl, Rab. Fungi Eur., 1200. 1866. 
Ustilago Panici glauci Wint., Rab. Krypt. FI., I 1 : 97. 1881. 
Exsiccati : Ustilago neglecta Niessl, on Setaria glauca, Ell., N. A. Fungi, 
286, Seym. & Earle, Econ. Fungi, 65 a-b, 65 c, (fasc. viii), Barth., Ell , & 
Ev., Fungi Col., 1700; Ustilago Panici glauci (Wallr.) Wint., on Setaria 
glauca , Seym. & Earle. Econ. Fungi Clinton Ust. Supp., C 81, Griff., West 
Amer. Fungi, 13. 
Sori in spikelets, infecting all of the spike, ovate, 2-3 mm. in 
