Part 1. 1906] USTILAGINACEAB 27 



soon ruptures and discloses an olive-black dusty spore-mass ; false membrane easily sepa- 

 rated into hyaline or slightly tinted generally subspherical cells which are also somewhat 

 scattered in the spore-mass and are slightly larger than the spores ; spores often mechanically 

 adhering in irregular masses, reddish-brown, occasionally ovoid but chiefly subspherical 



or polyhedral, abundantly but minutely verruculose, 8-12 jm in length. 



On Poaceae : 



Echinochloa Crus-galli {Panicum Crus-galli), Illinois. 



Syntherisma sangiiinale {P. sanguinale)^ Mississippi. 



Type locality : Holly Springs, Mississippi, on Panicum sanguinale {Syntherisma san- 

 guinaW). 



Distribution : Illinois and Mississippi. 



Sphacelotheca diplospora verruculosa Clinton, var. nov. Sori apparently in all of the ovaries of 

 the inflorescence, with rather firm false membrane of oblong to cuboidal or rarely subspherical cells; 

 spores evidently verruculose, 9.5-13 /i^ in length. On Poaceae ; Panicum sp., Mexico. Type col- 

 lected at Lecheria, near City of Mexico, July, 1904, by C. G. Pringle, and communicated by E. W. 

 D. Holway. Differs especially from the species in the larger more evidently verruculose spores. 



Sphacelotlieca diplospora glabra Clinton & Ricker, var. nov. Sori apparently in all of the 

 ovaries of the inflorescence ; spores slightly tinted to reddish-brown, apparently smooth (under an 

 immersion rarely some of the darker-colored obscurely verruculose), 8-11 ^ in length. On Poa- 

 ceae : Panicum roitboellioides^ Cuba. Type collected at Herradura, Cuba, March 16, 1906, by A. 

 S. Hitchcock. Differs from the species in the lighter-colored, smoother spores. 



7. Sphacelotheca pamparum (Speg.) Clinton, Jour. Myc. 8 : 140. 1902. 



UsHlago Seiariae " Niessl? ", Speg. Anal. Soc. Ci. Argent. 10 : 5. 1880. Not U. Setariae Niessl. 

 Us tilago pamparum Speg. Anal. Soc. Ci. Argent. 17: 89. 1884. 

 UsHlago Kolaczekii Kiihn ; Rab.-Wint. Fungi Bur. 3401. 1886. 



Sori infecting all of the ovaries of the spike, extending between the glumes as oblong 

 bodies about 3-7 mm. in length, with evident false membrane which ruptures irregularly 

 from apex into several elongate lobes and discloses a somewhat dusty, olive-black spore- 

 mass and an evident columella ; cells of false membrane chiefly hyaline, oblong to sub- 

 spherical, adhering together rather permanently, chiefly smaller than the spores; spores 

 reddish-brown, ovoid to spherical but chiefly polyhedral through pressure, minutely verruc- 

 ulose, 9-12 /i, rarely 14 /^, in length. 



On Poaceae : 



Chaeiochloa imherbis {Setaria imberbis') , Cuba. 



Chaetochloa {Setaria') sp., Mexico. 

 Type LOCALITY : Argentina, on Setaria glauca {Chaetochloa glauca) . 

 Distribution : Mexico ; Cuba ; also in South America and :Burope. 

 BxsicCATi : Sydow, Ust. 162. 



8. Sphacelotheca occidentalis (Seym.) Clinton, Jour. Myc. 8 : 141. 1902. 



Sorosporium Ellisii occidentalis Seym. ; EH- & Kv. N. Am. Fungi 2265. F 1889. 

 Usttlago Andropogonis Kellerm. & Swingle, Jour. Myc. 5 : 12. Mr 1889. (Type from Kansas, 

 on Andropogon furcatus .^ 



Sori in the ovaries linear, usually 0.5-1 cm. or rarely longer, with prominent false mem- 

 brane dehiscing from apex, with rather prominent columella and agglutinate or finally dusty 

 black-brown spore-mass ; sterile cells of membrane hyaline, variable in shape and size, ad- 

 hering together rather firmly, often somewhat obscured through semi-gelatinization but the 

 loose groups of the interior composed of more regular subspherical cells ; spores often ad- 

 hering together mechanically but not in spore-balls, reddish-brown, ovoi(Jto spherical, usu- 

 ally somewhat angled, often more elongate and irregular, verruculose, chiefly 12-17 ^, 

 irregular elongate forms sometimes even 20 ^, in length. 



On Poaceae : , , ^t .^ -rx i ^ 



Andropogon furcatus , Kansas, Nebraska, North Dakota. 



Andropogon glomeratus {A. macrourus'), California. 



Andropogon Hallii, Illinois (.cult.), Kansas, Nebraska 

 TvPE LOC^iTY : Bismark, North Dakota, on Andropogon furcatus . ^ ^ ,.^ . 



STstr^bu™nT hlinois (on cultivated plants) ; North Dakota to Kansas and Cahfornia. 

 illustrations: Jour. Myc. 5 : pi. /, /- 12-25; Trans. Acad. Sci. St. I^ms 7 : pi. 26, f. 14-17, 



^"' eSTc'caIx'; iSs & Kv.VAm' ^'^^'gi 2265, 2422 ; Bllis & Bv. Fun.i Columb. 538. 



9 Sphacelotheca Ischaemi (Fuckel) Clinton, Jour. Myc. 8 : 140. 1902. 



Cintractia Ischaemi Sydow, Oesterr. Bot. Zeits. 51 : 12. 1901. 



