Part 1, 1906] USTILAGINACBAB 29 



nent false membrane that gradually flakes away disclosing the at first agglutinated but 

 finally dusty olive-black spore-mass, with prominent often forked columella ; sterile cells 

 hyaline, with those of membrane adhering together rather firmly and those of interior in 

 groups, chiefly subspherical , smaller to larger than the spores; spores reddish-brown, ovoid 

 to chiefly subspherical or spherical, sometimes angled, often apparently smooth but really 

 very minutely verruculose, 9-13 ^ in length. 



On Poaceae : 



Andropogon hirtifolius puhiflorus^ Mexico. 



Andropogon saccharoides^ Arizona ; Mexico. 

 Type locality: Patzcuaro, Michoacan, Mexico, on Andropogon hirtif alius pubiflorus. 

 Distribution : Arizona and Mexico. 

 ExsiCCATi : Sydow, Ust. 201, 251, 



13. Sphacelotheca montaniensis (Ellis & Holway) Clinton, 



Jour. Myc. 8 : 141. 1902. 



Usiilago montaniensis Ellis & Holway (; Ellis & Ev. N. Am. Fungi 2263 ; hyponym. 1889), Tour. 

 Myc. 6: 119. 1891. 



Sori in the inflorescence (more rarely in the individual spikelets and then smaller), 

 usually enveloped by the leaves, elongate, chiefly 10-15 mm. in. length, protected by an evi- 

 dent whitish false membrane, with small flattened columella ; sterile cells gf membrane and 

 interior hyaline, thick-walled, chiefly subspherical, adhering in irregular groups that are 

 easily separated into individual cells, usually smaller than the spores ; spores dark reddish- 

 brown, chiefly ovoid to subspherical, echinulate (sometimes rather bluntly), 12-15 /^ in 

 length. 



On Poaceae : 



Muhlenbergia racemosa {M. glomerata), Montana. 



Muhlenbergia sp. , Montana. 

 Type locality: Sand Coulee, Montana, on Muhlenbergia glomerata {M. racemosa). 

 Distribution: Montana. 



Illustration : Bull. Iowa Agr. Exp. Sta. 54 : /. 114 {16). 

 Exsiccati ; Ellis & Ev. N. Am. Fungi 226S. 



14. Sphacelotheca strangul'ans (Issat.) Clinton, Proc. Bost. 



Soc. Nat. Hist. 31 : 392. 1904. 



Usiilago sirangulans Issat. Scripta Bot. Hort. Univ. Petrop. 5 : 225. 1896. 



Sori in the inflorescence, forming lanceolate to linear bodies about 8-15 mm. in length, 

 often concealed by the leaf-sheaths, covered by a conspicuous whitish false membrane, some- 

 times with abortive remains of spikelets at the tip, upon rupture disclosing an olive-black 

 dusty spore-mass within which is a conspicuous columella ; sterile cells of membrane easily 

 separated into single, twin, or a chain of several cells, hyaline, ovoid to subspherical, 

 chiefly smaller than the spores ; spores dark reddish-brown , ovoid to chiefly subspherical 

 or spherical, conspicuously verruculose, about 12-14.5 y. in length. 



On Poaceae : 



Eragrostis neo-m.exicana, Arizona. 

 Type locality: Russia, on Eragrostis poaeoides. 

 Distribution: Arizona; also in Europe. 

 Illustration : Bull. Torrey Club 31 : 85,/. 7. 



15. Sphacelotheca Reiliana (Kiihn) Clinton, Jour. Myc. 8: 141. 1902. 



Usiilago Reiliana Kiihn ; Rab. Fungi Bur. 1998. 1875. 



Usiilago Reiliana f. Zeae Pass.; Rab. Fungi Eur. 2096. 1876. ^ „^ 



Usiilago pulveracea Cooke, Grevillea 4 : 115. 1876. (Type from India, on Zea Mays.) 



Ciniractia Reiliana Clinton, Bull. in. Agr. Exp. Sta. 57 : 346. 1900. 



Usiilago {Ciniractia') Reiliana i.foliicola Kellerm. Ohio S. U. Nat. 1 : 9- 19U0. 



Sori very prominent, forming irregular masses including more or less of the entire 

 panicle, usually 5-15 cm. in length, often at first protected by the leaf -sheath, with evident 

 whitish false membrane enclosing the black-brown spore-mass and ray-like remains of the 

 peduncles or columellas, in time becoming ruptured and Spores scattered ; sterile cells 

 besides forming membrane scattered in usually subspherical groups through the spore-mass, 

 chiefly subspherical, 7-15 // in diameter ; spores somewhat opaque, chiefly subspherical to 



