28 NORTH AMERICAN FLORA [Volume 7 



Sori often involving entire inflorescence, linear, usually enclosed by leaf-sheaths, 

 about 10-30 mm. in length by 1-3 mm. wide, with false membrane soon rupturing and 

 black-brown spore-mass becoming scattered, eventually leaving behind the naked colu- 

 mella ; sterile cells besides forming false membrane also scattered through spore-mass in 

 subspherical groups 25^0 /^ in diameter, the individual cells being hyaline, subspherical, 

 flattened where in contact, 7-18/^ in diameter ; spores usually ovoid to spherical, smooth or 

 sometimes very minutely granular, 7-10 // in length. 



On Poaceae : 



Andropogon furcatus^ Kansas. 



Andropogon saccharoides, Mexico. 



Andropogon Torreyanus, Arizona, Texas. 



Andropogon sp., Arizona. 



Heieropogon contorius {^Andropogon contort'us)^ Arizona ; Mexico. 



Schizachyrium scopariitm {Andropogon scoparius), Illinois. 

 Type locality : Biebrich, Germany, on Andropogon Ischaemum. 



Distribution : Kansas, Texas, Arizona, and Mexico ; also in South America, Kurope, Africa, 

 and Asia. 



Illustrations: Brefeld, XJnters. Gesammt. Myk. 5: pi. 11, f. 1-2; Flora 83 : pi. 3,f. 1-6; 

 Bull. Soc. Nat. Mosc. 40i : pi. 3,f.7. 



KxsicCATi: Seym. & Farle, Econ. Fungi C 44 : Ellis, Ev. & Barth. Fungi Columb. 1783; 

 Griff. West Am. Fungi 216, 216^. 



10. Sphacelotheca Paspali-notati (P. Henn.) Clinton, Jour. Myc. 



8: 140. 1902. 



UsHlago Paspali-nolali P. Henn.; Clinton, loc. cit. as a synonym. 1902. 



Sori in the inflorescence, linear, about 4-6 cm. in length, with evident false membrane 

 gradually flaking away from apex and exposing reddish-brown dusty spore-mass surround- 

 ing evident often forked columella ; sterile cells hyaline, with those of the membrane 

 adtiering rather firmly, with loose ones in roundish clusters, usually larger than the spores ; 

 spores light reddish-brown, ovoid to spherical or slightly angled, apparently smooth but 

 very minutely verruculose, 7-10," in length. 



On Poaceae: 



Paspalum notaium, Mexico. 

 Type locality: Guadalajara, Mexico, on Paspalum notatum. 

 Distribution : Known only from the type locality. 

 ExSiCCATi: Seym. & Earle, Econ. Fungi C 121. 



11. Sphacelotheca Panici-leucophaei (Bref.) Clinton. 



UsHlago Panici-leucophaei Bref. Unters. Gesammt. Myk. 12 : 114. 1895. 



UsHlago insularis P. Henn. Hedwigia 35 : 51. 1896. (Type from Brazil, on Tricholaena insularis. ) 



Sori possibly involving the very young inflorescence but apparently chiefly in the 



enveloping leaves, projecting from between the leaf-sheaths as conspicuous linear bodies 



often 1.5 dm. in length, with the false whitish membrane flaking away, revealing the 



shredded longitudinal filaments of plant-tissue and the brown-black spore-mass which soon 



scatters ; sterile cells of membrane hj^aline, guttulate, separating on pressure into threads or 



individual cells, subspherical to oblong, 6-14 ," in length ; spores reddish-brown, ovoid to 



chiefly subspherical or spherical, often slightly angled, easily collapsing, smooth or very 



minutely granular, chiefly 6-8 ii in length. 

 On Poaceae : . 



Trichachne insulare {Panicum leucophaeum) , Cuba ; Guatemala ; Jamaica ; Mexico ; Porto 

 Rico. 



Trichachne saccharaium {Panicum saccharaium) ^ Arizona. 

 Type locality: Rio de Janeiro, Brazil, on Panicum leucophaeum. {Trichachne insulare). 

 Distribution : Arizona to Guatemala and Porto Rico ; also in South America. 

 Illustration : Brefeld, Unters. Gesammt. Myk. 12 : pi. 6, f. 42. 

 ExsiCCATi : Seym. & Earle, Econ. Fungi C82. 



12. Sphacelotheca Andropogonis-hirtifolii (P. Henn.) Clinton, 



Jour. Myc. 8 : 141. 1902. 



UsHlago Andropogonis-hirlifolii P. Henn. Bot. Gaz. 28 : 274. 1899. 



UsHlago Andropogonis-saccharoidisV. Henn.; Sydow, Vst.251; hyponym. 1901. (Type from 

 Mexico, on Andropogon saccharoides.) 



Sori involving the entire inflorescence, elongate, usually 5-9 cm. in length (rarely in 

 the individual spikelets and then shorter), at first enveloped by the leaf-sheath, with promi- 



