12 NORTH AMERICAN FLORA [V01.UMS 7 



24. Ustilago olivacea (DC.) Tul. Ann. Sci. Nat. III. 7 : 88. 1847. 



Uredo olivacea DC. Fl. Fr. 6 : 78. 1815. 



Ustilago caricicola Tracy & Earle, Bull. Torrey Club 26 : 493. 1899. (Type from Mississippi, on 

 Carex follicula ia . ) 



Sori in occasional ovaries, often at first more or less concealed by perigynium, forming 

 rounded bodies 2-6 mm-, in diameter, at first with firmly agglutinated spore-mass but finally 

 more or less dusty, usually with conspicuous threads intermingled with the spores ; spores 

 light olive-brown, usually irregular, varying from linear to oblong or subspherical, but in 

 some instances more regular and then chiefly subspherical or spherical, very minutely 

 verruculose, usually 5-9 fJ, but the most elongate occasionally 14 fi, in length. 



On Cyperaceae : 



Carex cladostachya (C polystachya) , Mexico. 



Carex folliculata australis, Mississippi. 



Carex turgescens, Florida. 



Carex utriculaia^ Washington, Wisconsin. 



Carex sp., Mexico, Jamaica. 

 Type locality: France, on Carex riparia. 



Distribution : Wisconsin to Washington, Florida, Mexico and Jamaica ; also in South 

 America, Kurope, and Asia. 



Illustrations : Brefeld, Unters. Gesammt Myk. ^\pl. 10, f. 9-26; Bull. Soc. Nat. Mosc. 40i : 

 pl.3,f. 11. 



25. Ustilago Sieglingiae Ricker, Jour. Myc. 11 : 112. 1905. 



Sori in ovaries, infecting all, ellipsoidal, about 2-^ mm. in length, protected by thin 

 membrane and enveloping glumes, finally shedding the dusty dark-brown spore -mass ; 

 spores rather uniformly colored, medium-dark reddish-brown, ellipsoidal to chiefly sub- 

 spherical or spherical, occasionally more elongate or irregular, smooth or very minutely 

 and obscurely echinulate, 4-6/^, or the most elongate 7/^, in length. 



On Poaceae : 



Trip lasis purpurea^ Florida. 

 Type locality : Punta Rassa, Florida, on Sieglingia purpurea {Triplasis purpurea) . 



Distribution : Florida. 



26. Ustilago Triplasidis Ellis & Ev.; Clinton, Proc. Bost. Soc. Nat. 



Hist. 31 : 355. 1904. 



Sori in ovaries, ellipsoidal, about 3-4 mm. in length, protected by thin membrane, 

 showing between the glumes of most of the spikelets ; spores light reddish-brown, often 

 lighter-colored on one side, ovoid to chiefly subspherical or spherical, usually abundantly 

 but very minutely echinulate, 5-9/^ in length. 



On Poaceae : 



Triplasis americana, Mississippi. 

 Type locality : Deer Island, Biloxi, Mississippi, on Triplasis americana. 



Distribution : Mississippi. 



27. Ustilago sparsa Underw. Bull. Torrey Club 24: 86. 1897. 



Sori in the ovaries, ovate, usually infecting few of the spikelets, about 2-3 mm. in 

 length, with rupture of the covering disclosing a dusty brown-black spore-mass; spores 

 light reddish-brown, ovoid or ovate to spherical, distinctly echinulate, chiefly 6-10 /^ in 



length. 



On Poaceae : 



Daciyloctenium aegypiium, Alabama, South Carolina. 



Type locality: Auburn, Alabama, on Daciyloctenium aegyptium. 



Distribution : Alabama and South Carolina. 



EJxsiCCATi: Rav. Fungi Am. 790; Seym. & Barle, Kcon. Fungi C86. 



28. Ustilago spermophora B. & C; (Ellis, N. Am. Fungi 1098; hyponym. 



1883) Sacc. Syll. Fung. 7': 466. 1888.' 



Sori in the ovaries, usually infecting only a few in the spikelets, ovate, small, 1-2 mm. 

 in length, sometimes bearing remains of unaffected part of ovary at apex, protected by a 



1 Listed in Curt. Cat. Pi. N. Car. 123, in 1867. 



