USTILAGO. 



289 



Ust. secalis Eabenh. Eye-brand. This occurs but rarely, 

 and destroys only the grain. 



Ust. panici-miliacei (Pers.) {Ust. destruens Duby). Smut 

 of Millet. This smut occurs on the flowers of Panicum milia- 



FlG. iM.—Uatilago hordei. Barley-smut on Sordeum distiehum. (v. Tubeuf phot.) 



ceum, P. chartaginiense and P. Crtis-galli in Italy, France, 

 Germany, and North America. Sometimes it is very abundant 

 and causes great damage. The mycelium makes its way into 

 young plants and grows upwards with them, penetrating every 



