Part 3, 1912] AECIDIACEAE 223 



about 0.5-0.8 mm. long, rather early naked, pulverulent, cinnamon-brown, ruptured epi- 

 dermis noticeable; urediniospores broadly ellipsoid or obovoid, 15-18 by 18-24//; wall 



golden-brown, rather thin, 1-1.5 m, rather finely and sparsely echinulate, the pores 2 or 3, 

 equatorial . 



III. Telia amphigenous, densely crowded in small roundish or irregular groups, occa- 

 sionally solitary, oval or oblong, small, 0.2-0.5 mm. long, often confiuent, soon naked, 

 pulvinate, compact, blackish, ruptured epidermis not conspicuous ; teliospores pyriform or 

 obovoid, 15-19 by20-27.M, rounded, obtuse or truncate attheapex, narrowed below ; wall cin- 

 namon-brown, 1 .5-2 ^ thick, much thicker above, 5-7 /z, smooth ; pedicel tinted, about length 

 of spore or less. 



On Sparganiaceae : 



Sparganium eurycarpum Engelm., Illinois, Iowa, Nebraska, New York, Ohio, Wiscon- 

 sin ; Ontario. 



Type locality : Buffalo, New York, on Sparganium [eurycarpum] . 

 Distribution : Eastern Ontario to Nebraska. 



ExsiCCATi : Kellertn. Ohio Fungi 2^£?; Sydow, Ured.55^, 2304; Rab.-Wint. Fungi Eur. 2904; 

 Earth. Fungi Columb. 2398; Earth. N. Am. Ured. 197. 



2. Nigredo pedatata (Schw.) Arthur. 



Caeoma {Aecidiuni) pedatatum Schw. Trans. Am. Phil. Soc. II. 4: 293. 1832. 

 Caeoma {Aecidium) sagiitaium Schw. Trans. Am. Phil. Soc. II. 4 : 293. 1832. 

 Aecidium {Caeoma) pedatatum Schw. Trans. Am. Phil. Soc. II. 4 : 309. 1832. 

 Aecidium {Caeoma] sagittatmn Schw. Trans. Am. Phil. Soc. II. 4 : 309. 1832. 

 Aecidium Peiersii Berk. & Curt.; Berk. Grevillea 3 : 61. 1874. 

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

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

 Nigredo Andropogonis Arth, Result. Sci. Congr. Eot. Vienne 343. 1906. 

 Uromyces pedataius J. Sheldon, Torreya 10 : 90. 1910. 



0. Pycnia chiefly epiphyllous, gregarious, rather loosely arranged in groups on pale 

 orbicular spots 1-5 mm. across, not conspicuous, honey-yellow becoming blacki sh -brown , 

 globose, 40-60 M in diameter. 



1. Aecia hypophyllous, gregarious, usually crowded on pale orbicular spots 1-5 mm. 



across, cupulate, short, small, 0,2-0.3 mm. across ; peridium colorless, the margin eroseand 



somewhat recurved; peridial cells rhomboidal in longitudinal section, 12-18^ thick by 15- 



21/1 long, slightly overlapping, the outer wall rather thick, 5-8 ju, transversely striate, 



smooth, the inner wall much thinner, 2-3 /i, moderately verrucose ; aeciospores subglobose, 



often somewhat angular from compression, small, 10-16 by 12-18/i; wall thin, 1-1. 5ju, 



minutely verrucose. 



On Violaceae : 



Viola lanceolata ly., Delaware. 



Viola pedaia I^., Pennsylvania. 



Viola prim-ulaefolia L-, District of Columbia, Georgia, Mississippi. 



Viola sagittata 1,., Delaware, Pennsylvania. 



II. Uredinia hypophyllous, scattered, oval or oblong, small, 0.2-0.4 mm. long, some- 

 times confluent, early naked, light-brown, somewhat pulverulent, ruptured epidermis not 

 noticeable ; urediniospores subgloboid or very broadly ellipsoid, 13-17 by 16-19 /x; wall light 

 cinnamon -brown, 2-2.5/* thick, closely verrucose-echinulate, the pores 4, sometimes 3, 



equatorial . 



III. Telia hypophyllous, scattered, oval or oblong, about 0.1 mm. wide by 0.2-0.5 mm. 

 long, sometimes crowded and confiuent, early naked, pulvinate, dark chocolate-brown, 

 ruptured epidermis somewhat noticeable; teliospores broadly ellipsoid, 13-16 by 19-29 /i, 

 rounded or often narrowed below, rounded or more often truncate above ; wall dark chest- 

 nut-brown, rather thin, 1.5-2 /x, thicker at apex, 5-10/t, smooth; pedicel somewhat tinted, 

 uniform in diameter, once to twice length of spore. 



On Poaceae : 



Andropogon glomeratus (Walt.) B.S.P. {,A. macrourus Michx.), Alabama, Delaware, 



Florida, Maryland, Mississippi, New Jersey, Tennessee. 

 Andropogon virginicus I^., Alabama, Arkansas, Delaware, Florida, Kentucky, Louisiana, 

 Maryland, Mississippi, North Carolina, Ohio, South Carolina, Tennessee, West Virginia. 

 Type locality: Bethlehem, Pennsylvania, on Viola pedata. 



Distribution : New Jersey to southern Ohio and Arkansas, southward to the coast, 

 BxsiCCATi : Ellis & Ev. N. Am. Vvingi 3138, 3343 ; Seym. & Earle, Econ. Fungi Suppl. Bl ; 

 Earth. Fungi Columb. 2890, 3088. 



