14 NORTH AMERICAN FLORA [Voi.xjme; 7 



Bouteloua oligosiachya^ Arizona, Colorado, Kansas, Montana, New Mexico. 



Bouieloua polysiachya, Arizona. 



Dasyochloa pulchella {Trio dia pule he lla) ^ Arizona. 



Pappophoriim Wri^htii^ Arizona. 



Triathera arisiidoides {Bouieloua arislidoides)^ Arizona, Mexico. 

 Type locality : Argentina, on Bouteloua ciliaia. 



Distribution : Montana to Texas, Arizona and Mexico ; also in South America. 

 Illustrations : Trans. Acad. Sci. St. Ivouis 7 : pi. 28, f. 1-2, 4-6, pi. 29, f. 1-4, P, 10. 

 ExsiCCATi : GrifF. West Am. Fungi 217, 217 a, 218, 219, 220, 224, 227. 



33. Ustilago Buchloes Ellis & Tracy, Jour. Myc. 6 : 77. 1890. 



Sori on leaves, usually forming sausage-shaped pustujes, ovoid to linear, 3-10 mm. in 

 length, at first covered by thin grayish membrane which soon ruptures and black-brown 

 spore-mass becomes scattered ; spores dark reddish-brown, ellipsoidal to spherical or occa- 

 sionally somewhat angled, smooth or very obscurely verruculose, 13-16 \i in length. 



On Poaceae : 



Bulbilis dactyloides {Buchloe dactyloides) , Nebraska, New Mexico. 

 Type locality: Coolidge, New Mexico, on Buchloe dactyloides {Bulbilis dactyloides). 

 Distribution : Nebraska and New Mexico. 

 Illustration : Bull. Iowa Agr. Exp. Sta. 54 : /. 114 {8). 



34. Ustilago pustulata Tracy & Earle, Bull. Torrey Club 22 : 175. ;895. 



Sori usually in ovaries, sometimes also in stamens, forming ovate bodies about 2-4 mm. 

 in length, occasionally on stem near nodes or at base of inflorescence and then forming 

 more conspicuous often nodular swellings one to several centimeters in length, with dehis- 

 cence of the thin smooth membrane disclosing a dusty olive-brown spore-mass ; spores chiefly 

 ovoid to spherical, occasionally more irregular, usually prominently echinulate, 9-12 f^, 

 the most elongate rarely 15 /i, in length. 



On Poaceae : 



Panicuni proliferum, Illinois, Iowa, Kansas, Mississippi, Nebraska. 



Panicum virgatum, Texas. 

 Type locality : Starkville, Mississippi, on Pa^iicum proliferum. 

 Distribution : Illinois to Nebraska. Mississippi and Texas. 

 Illustration : Bull. Iowa Agr. Kxp. Sta. 54: /. 114 (2). 



ExsiCCATi: Ellis & Ev. N. Am. -Pnngi 3JJ9 ; Seym. & Earle. Kcon. Fungi C84; EUis, Ev. 

 & Barth. Fungi Columb. 2194. 



35. Ustilago sphaerogena Burrill; (Ellis & Ev. N. Am. Fungi 1S92/ 



hyponym. 1887) Sacc. Syll. Fung. 7' : 468. 1888. 



Cintractia sphaerogena Hume, Proc. Iowa Acad. Sci. 9 : 233. 1902. 



Sori in ovaries, ovate, chiefly 3-6, rarely 10, mm. in length, covered with a tough hispid 

 membrane which ruptures irregularly from apex disclosing at first an agglutinated but 

 finally a dusty olive-brown spore-mass; spores ovoid to subspherical , prominently and 

 sharply echinulate, chiefly 9-12 /^ in length. 



On Poaceae : 



Echinochloa colona {Panicum colonum), Texas. 



Echinochloa Crus-galU {Panicum^ Crus-galli), Connecticut, Illinois, Iowa, Missouri, Ne- 

 braska, North Carohna ; Mexico. 



Echinochloa Walteri {Panicum Walteri), Delaware. 

 Type locality: Osborne, Illinois, on Panicum Crus-galli {Echinochloa Cnis-galli). 

 Distribution : Connecticut to Nebraska, North Carolina, and Mexico. 

 Illustrations : Bot, Gaz. 19 : pL 18, f. 5-7 ; Bull. Conn. Geol. Nat. Hist. Surv. 5 : /. 53 ; Bull. 



Iowa Agr. Exp. Sta. 54: /. 120 (7). 



ExsiCCATi: Ellis & Ev. N. Am. Fungi 1892; Seym. & Earle, Econ. Fungi C 88, C 147 ; 



Rab.-Wint.-Paz. Fungi Eur. 4307. 



There is some question whether this species is distinct from Ustilago irichophora (Link) J. 

 Kunze reported by Kornicke on Panicum colonum. from Egypt. The same host has been found in 

 this country with a smut, and a recent examination of the specimens shows it to be the same as 

 Ustilago sphaerogena, except the sori are somewhat smaller. 



36. Ustilago Crus-galli Tracy & Earle, Bull. Torrey Club 22 : 175. 1895. 



Cintractia Seymouriana Magn. Ber. Deuts. Bot. Ges. 14: 217. 1896. (Type from Wellesley, Mas- 

 sachusetts, on Panicum Crus-galli,) 

 Cintractia Crus-galli Magn. Ber. Deuts. Bot. Ges. 14: 392. 1896. 



Sori often encircling stem at nodes or at the place of the inflorescence infecting both stem 

 and leaves, prominent, often nodular, one to several centimeters in length, protected by 



