Part 3, 1912] AHCIMACEAB 22T 



10. Nigredo Sporoboli (Ellis & Ev.) Arth. Result. Sci. Congr. 



Bot. Vienne 344. 1906. 



Uromyces Sporoboli Ellis & Ev. Proc. Acad. Phila. 1893 : 155. 1893 

 Caeomurus Sporoboli Kuntze, Rev. Gen. 3^ : 450. 1898. 



O and I. Pycnia and aecia unknown. 



II. Uredinia hypophyllous, scattered, oblong or linear, cinnamon-brown, only a few 

 seen ; urediniospores broadly ellipsoid, 26-31 by 42-45^ ; wall pale cinnamon-brown, about 

 1.5-2 M thick, prominently echinulate, the pores distinct, 4, equatorial. 



III. Telia hypophyllous, scattered, oblong or linear, 0.5-1.5 mm. long, sometimes con- 

 fluent, rather early naked, pulvinate, blackish -brown, ruptured epidermis conspicuous; 

 teliospores obovate, oblong, or subglobose, 19-23 by 25-43 m, .rounded or obtuse above, 

 usually narrowed below; wall dark chestnut -brown with a slightly paler umbo, 1.5-2.5 m 

 thick, much thickened above, 6-9 m, smooth ; pedicel concolorous or nearly so, once to twice 

 length of spore or more. 



On Poaceae : 



Sporobolus asper (Michx.) Kunth {S. longifolius Wood), Kansas. 



Sporobolus cryptandrus (Torr.) A. Gray, South Dakota. 



Sporobolus neglecius Nash, Iowa, Kansas, Nebraska, South Dakota. 

 Type locality : Rockport, Kansas, on Sporobolus asper. 

 Distribution : South Dakota and northwestern Iowa south to Kansas. 



ExsicCATi : Ellis & Ev. N. Am. Fungi 2884; Ellis & Ev. Fungi Columb. 1599 ; D. Griff. W. 

 Am. Fungi 91, 256; Earth. Fungi Columb. Jj*9(5. 



11. Nigredo Eragrostidis (Tracy) Arth. Result. Sci. Congr. 



Bot. Vienne 343. 1906. 



Uromyces Eragrostidis Tracy, Jour. Myc. 7 : 281. 1893. 

 Caeomurus Eragrostidis Kuntze, Rev. Gen. 3^ : 450. 1898. 



O and I. Pycnia and aecia unknown. 



II. Uredinia amphigenous, scattered, oval or oblong, 0.3-0.8 mm. long, rather early 

 naked, very light cinnamon-brown, pulverulent, ruptured epidermis conspicuous ; uredinio- 

 spores broadly ellipsoid, 15-19 by 20~26jli; wall pale cinnamon-brown, thin, 1-1.5^, rather 

 finely and closely verrucose-echinulate, the pores 4-6, scattered, rather distinct. 



III. Telia chiefly epiphyllous, scattered, oblong, oval, or linear, 0.2-0.4 mm.^ wide by 

 0.3-1.5 mm. or more long, early naked, pulvinate, dark blackish-brown, ruptured epi- 

 dermis conspicuous ; teliospores obovoid or subgloboid, 16-23 by 19-27 ju ; wall dark chestnut- 

 brown, concolorous, moderately thin, 1.5-2.5^, much thicker above, 5-7 ju, smooth ; pedicel 

 colored, especially next the spore, firm, about as long as the spore. 



On Poaceae : 



Eragrostis limbata Fourn., Jalisco, Pueblo. 



Eragrostis neo-mexicana Vasey, Guanajuato, Hidalgo. 



Eragrostis pectinacea (Michx.) Steud., Alabama, Mississippi, Nebraska, Texas. 



Eragrostis pilosa (I^.) Beauv., Durango, Morelos. 



Eragrostis tephrosanthus Schult., Porto Rico. 

 Type locality: Starkville, Mississippi, ow Eragrostis pectinacea. 

 Distribution : Nebraska to northern Alabama and southward through the West Indies and 



Mexico. 



ExsiCCATi : Seym. & Earle, Econ. Fungi JJ7. 



12. Nigredo Alopecuri (Seym.) Arth. Result. Sci. Congr. Bot. 



Vienne 343. 1906. 



Uromyces Alopecuri Seym. Proc. Bost. Soc. Nat. Hist. 24 : 186. 1889. 

 Caeomurus Alopecuri Kuntze, Rev. Gen. 3^ : 449. 1898. 



O and I. Pycnia and aecia unknown. 



II. Uredinia chiefly hypophyllous, scattered, linear or linear-lanceolate, 0.5-1 mm. 

 long, rather early naked, somewhat pulverulent, pale-brown, ruptured epidermis notice- 

 able ; urediniospores subglobose or obovate-ellipsoid, 15-21 by 18-26 y. ; wall yellowish, 1.5-2 p. 

 thick, finely and rather closely verrucose-echinulate, the pores 6-8, scattered. 



III. Telia hypophyllous, also on the sheaths and culms, scattered, oblong, linear, or 

 sometimes punctiform, 0.2-0.8 mm. long, sometimes crowded end to end and more or less 



