^2 NORTH AMERICAN FLORA [V01.UME 7 



O N POACE AE : 



Cathesiecuni prostratum, Mexico. 



Type locality: Mexico, on *' Cathestecum procumbens^' {C. pro sir alum) . 

 Distribution : Mexico. 



18. Tilletia corona Scrib.; Tracy & Earle, Bull. Torrey Club 



23: 210. 1896. 



Neovossia corona Massee, Kew Bull. 1899 : 156. 1899. 



Sori in ovaries, ovoid or ovate, about 3-4 mm. in length, more or less exposed between 

 the glumes ; sp.ores showing different stages of development, when mature opaque, chiefly 

 subspherical or spherical, with evident hyaline membrane ending at one side in a short 

 pedicel -like projection, with evident sometimes slightly curved hyaline spines (on top of 

 spore showing as papillae) extending out to membrane and with it forming a hyaline band 

 1-2 fi deep, chiefly 19-25 fj- in diameter. 



On Poaceae : 



Homalocenchrus' lenticularis {Leersia lenticularis) ^ Mississippi. 



Homalocenchrus oryzoides {Leersia oryzoides) , District of Columbia, Missouri. 



Homalocenchrus virginicus {^Leersia virginica)^ District of Columbia, Illinois, Mississippi, 

 Ohio. 

 Type locality : Washington, District of Columbia, on Homalocenchrus oryzoides. 

 Distribution : District of Columbia to Missouri and Mississippi. 

 Exsiccati : Ellis & Ev. N. Am. Fungi 1896. 



19. Tilletia rugispora Ellis, Jour. Myc. 7 : 275. 1893. 



Sori in ovaries, subspherical, inconspicuous, about 2 mm. in diameter, concealed by the 

 glumes ; sterile cells hyaline or often tinted, more or less irregular, polygonal to subspherical, 

 thick -walled, var^dng from smaller to larger than the spores ; mature spores dark reddish- 

 brown, ovoid to spherical, with rather prominent tinted appendages that show at circumfer- 

 ence as blunt scales (1-2 /i) and on top in cross-section (1-2.5 //) as more or less irregular 



polygonal areas, 18-25 (i in length. 



On Poaceae : 



Paspalum plicaiulum, Texas. 



Paspalum- sp., Mexico. 

 Type locality : College Station, Texas, on Paspalum plicaiulum . 

 Distribution : Texas and Mexico. 

 KxsicCATi : Ellis & Ev. N. Am. Fungi 2704. 



20. Tilletia pulcherrima Ellis & Gall.; Clinton, Proc. Bost. Soc. 



Nat. Hist. 31 : 441. 1904. 



Sori in ovaries, ovate or more elongate and somewhat curved, extending between the 

 spreading glumes, about 3-4 mm. in length ; hyaline sterile cells medium to very thick- 

 walled, chiefly smaller than the spores ; spores showing different stages of development, 

 the mature spores being opaque, subspherical to spherical, with more or less evident hyaline 

 membrane and conspicuous hyaline or opaque acute or truncate scale-like projections 2 fi 

 long (in cross-section on top of spores showing as polygonal areas), chiefly 20-30/^ in 

 diameter. 



On Poaceae : 



Panicum oblusitm, Arizona. 



Panicum virgalum, Illinois, Nebraska. 



Synlherism-a sanguinale {Panicum- sanguinale), Mississippi. 

 Type locality : Oregon, Illinois, on Panicum virgatum. 

 Distribution: Illinois, Mississippi, Nebraska, and Arizona. 

 Illustration : Bull. Torrey Club 31 : 85,/. 5, 6. 

 ExsiCCATi : Seym. & Earle, Econ. Fungi 5^J, C52. 



21. Tilletia horrida Tak. Bot. Mag. Tokyo 10 : 20. 1896. 



Sori in ovaries more or less destroying them, completely concealed by enveloping 

 glumes ; spores showing different stages of development, with youngest as thick-walled, 

 hyaline cells, mature spores rather opaque, chiefly subspherical to spherical, with very coarse 

 hyaline or slightly tinted somewhat curved scales showing at circumference of spore as a band 

 about 2-4 II wide and on its top in cross-section as polygonal areas 2-3 u- across, with hya- 



