CLINTON: NORTH AMERICAN USTILAGINEAE. 
359 
minor. Then, too, the forms recorded here questioningly on JBoute- 
loua polystachya (220 of Griffiths’ exsiccati) and Pappophorum 
Wrightii (224 also of Griffiths’ exsiccati) differ from the other 
specimens in having the sori in the inflorescence instead of on the 
leaves. Norton has described the germination of the spores. Lit¬ 
erature : 29, 72, 74, 129. 
Ustilago Buchloes Ell. & Tr. 
Ustilago bucliloes Ell. & Tr., Journ. Myc., 6 : 77. 1890. 
Sori on leaves, usually forming sausage shaped pustules, ovoid to 
linear, 3-10 mm. in length, at first covered by thin grayish mem¬ 
brane which soon ruptures and black brown spore mass becomes 
scattered; spores dark reddish brown, ellipsoidal to spherical or 
occasionally somewhat angled, smooth or very obscurely verruculose, 
13-16 /x in length. 
Host: Buchloe dactyloides , Neb., N. Mex. (type). 
The sausage shaped sori are peculiar though also possessed by 
Ustilago Hieronymi which differs from this species only in its 
minutely though plainly echinulate spores. This species has only 
been collected twice and it is possible that it is more variable than 
recorded here. Its germination has not been described. Griffiths 
writes that the host of a type specimen in the Dept, of Agriculture 
herbarium is Pouteloua and not Puchloe. Possibly the preceding 
species is not distinct from this. 
Ustilago pustulata Tr. & Earle. 
Ustilago pustulata Tv. & Earle 1 , Bull. Torr. Bot. Club, 22 : 175. 1895. 
Exsiccati: Ustilago pustulata Tr. & Earle, on Panicum proliferum , Ell. 
& Ev., N. A. Fungi, 3339, Seym. & Earle, Econ. Fungi Clinton Ust. Supp., 
C 84. 
Sori usually in ovaries, sometimes also in stamens, forming ovate 
bodies about 2-4 mm. in length, occasionally on stem near nodes or 
1 In Vestergren’s Micr. Rar. Sel., no. 14, 1899, this same name, Ustilago pust¬ 
ulata (DC.) is used for a specimen collected by Lagerheim of the pustulata 
form of Ustilago Bistortarum. If this is the first time the name has been used 
for this so-called species it cannot have precedence over the name as used 
here. 
