CLINTON: NORTH AMERICAN USTILAGINEAE. 
367 
Hosts: Panicum filiforme, N. J., Mex. (Guadalajara); P. fim- 
briatum , Mex. (Guadalajara) ; P. glabrum , la., Ill., Ivans., Minn., 
N. H.; P. sanguinale , Ala., Conn., D. C., Ga., Ia., Ill., Ind., Ivans., 
Md., Mass., Miss., Minn., Mo., Neb., N. J., Ohio, N. Car., Tex., 
Wis.; Panicum sp., N. Y., S. Car. 
The spores of this very common species resemble those of Soro- 
sporium Syntherismae. It lacks, however, the spore balls and the 
prominent false membrane of that species. Klihn and Norton have 
reported the germination. Literature : 20, 129. 
Ustilago Holwayana P. Henn. 
Ustilago Holwayana P. Henn., Bot. Gaz., 28 : 274. 1899. 
Sori in the inflorescence, elongated, 2 cm. or more in length, 
concealed by leaf sheaths, at first covered by thin membrane which 
soon ruptures disclosing black brown dusty spore mass surrounding 
remains of inflorescence as a columella; spores medium dark reddish 
brown, ovoid to spherical or occasionally slightly angled, rather prom¬ 
inently echinulate, 12-16 /a in length. 
Host: Paspalum velutinum , Mex. (type). 
This species is near Ustilago Pabenhorstiana from which it differs 
in the slightly larger and more prominently echinulate spores. There 
have been five other species of smuts described on Paspalum as the 
host. The germination of this is unknown. 
Ustilago Aegopogonis P. Henn. 
Ustilago Aegopogonis P. Henn., Hedw., 37 : 267. 1898. 
Sori elongated-ellipsoidal, 5-10 mm. in length, enclosed in leaf 
sheaths, possibly aborting the inflorescence but the dusty black spore 
mass without remains of plant tissues ; spores dark reddish brown, 
subopaque, broadly oblong or ovate to spherical or often slightly 
angled, rather obscurely verruculo-echinulate, chiefly 11-14 g in 
length. 
Hosts: Aegopogon cenchroides, Mex. (type); Hilaria cenchroides , 
Ariz. 
This is another of the southern species about which too little is 
known and whose germination has not been reported. The speci¬ 
mens collected by Griffiths on Ililaria cenchroides in Arizona do 
