Part 3. 1912] AEJCIDIACEAB 



235 



acutisk above, usually narrowed below ; wall chestnut-brown, 1.5-2 /x thick, thicker above, 

 7-9 M, smooth ; pedicel hyaline, one to three times length of spore. 

 On Cyperaceae : 



Care:x: lupulina Muhl., Indiana, 



Carex utriculaia Boott, Indiana. 



^T^^T«^m?^T^'i^^^J^^"^'^^^^^ Hamilton County, Indiana, on Carex utriculaia. 

 Distribution: Known only from the state of Indiana 

 Illustration: Rhodoral2: 126,/. 2. 



28. Nigredo perigynia (Halsted) Arth. Result. Sci. Congr. Bot. 



Vienne 344. 1906. 



Uromyces perigynius Halsted, Jour. Myc. 5 : 11. 1889 



Uromyces cartcinus Ellis & Ev. Bull. Torrey Club 22 • 58 1895 



Caeomurus cartcinus Kuntze, Rev. Gen. 33 ; 449. 1898 



Caeomurus perigynius Kuntze, Rev. Gen. 33 : 450. 1898. 



Uromyces Sohdagini-Caricis Arth. Jour. Myc. 10: 16. 1904. 



Caeomurus Sohdagini-Caricis Kxth.. Proc. Ind. Acad. Sci. 1903: 144. 1904 



Nigredo cartctna Arth. Result. Sci. Congrr. Bot. Vienne 343. 1906. 



JNigredo iyohdagini-Caricis Arth. Result. Sci. Congr. Bot. Vienne 344. 1906. 



O. Pycnia amphigenous, numerous, in extended groups, on conspicuous discolored 

 spots, honey-yellow, not conspicuous, globoid, small, 60-80 /z in diameter ; ostiolar filaments 

 about 75 ju long. 



I. Aecia chiefly hypophyllous, gregarious, in irregular or sometimes annular groups 

 2-4 mm. or more across, on larger discolored spots, cupulate, 0.1-0.2 mm. in diameter ; 

 peridium colorless, the margin lacerate, strongly recurved ; peridial cells rhomboidal in longi- 

 tudinal section, 16-20 ju thick by 22-29 /x long, the outer wall rather thick, 5-7 m, finely and 

 transversely striate, smooth, the inner wall thinner, 3-4 ju, moderately verrucose, somewhat 

 striate; aeciospores globoid, 12-16 by 13-18/*; wall colorless, thin, 1 m, minutely verrucose. 



On Carduaceae : , 



Asters,'^., proven by culture, but not yet collected. 

 Solidago rugosa Mill., Maine. 

 Solidago sp., Indiana. 



II. Uredinia hypophyllous, scattered, oval or oblong, 0.3-0.7 mm. long, rather tardily 

 naked, cinnamon-brown, slightly pulverulent, ruptured epidermis noticeable ; uredinio- 

 spores broadly ellipsoid, 14-19 by 18-26^ ; wall light cinnamon-brown, rather thin, 1-1.5 m, 

 moderately and rather sparsely echinulate, the pores 2, opposite and slightly superequatorial . 



III. Telia chiefly hypophyllous, scattered, oblong or linear, 0.1-0.3 mm. wide by 0.3- 

 0.8 mm. or more long, rather early naked, pulvinate, chocolate-brown, often appearing 

 blackish, ruptured epidermis noticeable ; teliospores obovoid or ellipsoid, 12-19 by 19-34/*, 

 rounded or sometimes narrowed above, usually narrowed below ; wall light chestnut-brown, 

 rather thin, 1.5 /x, much thicker at apex, 7-13 /t, smooth ; pedicel slender, slightly tinted, 

 as long as the spore, or longer. 



On Cyperaceae : 



Carex cristate lla Britton (C cristaia Schw. not Clairv.), Ontario. 



Carex defiexa Hornem., Indiana, Maine, Massachusetts, Vermont; Nova Scotia. 



Carex flava L., Newfoundland, Nova Scotia. 



Carex intumescens Rudge, Iowa, Wisconsin ; Nova Scotia. 



Carex Novae-Angliae Schw., Nova Scotia. 



Carex scoparia Schkuhr, Delaware, New York ; Nova Scotia. 



Carex iribuloides Wahl., Ontario. 



Carex sp., Colorado. 

 Type locality : Ames, Iowa, on Carex intumescens. 



Distribution : Delaware, Indiana, and Colorado northward, mostly local. 

 ExsiCCATi: Ellis & Ev. N. Am. Fungi 222^; Earth. Fungi Columb. J59(9; Shear, N. Y. Fungi 

 318. 



29. Nigredo uniporula (Kern) Arthur. 



Uromyces uniporulus Kern, Rhodora 12 : 125. 1910. 



O and I. Pycnia and aecia unknown. 



11. Uredinia hypophyllous, scattered, roundish or oval, small, punctiform, 0.1-0.3 mm. 

 across, rather early naked, somewhat pulvinate, light chestnut-brown, ruptured epidermis 

 not conspicuous ; urediniospores globose or subglobose, 18-21 by 21-23 y. ; wall dark cinna- 

 mon-brown, rather thin, about 1.5 m, rather sparsely and strongly echinulate, the pore 1, 

 evident, in the lower part near the hilum. 



