Part 3, 1912] AECIDIACKAB 



23 



i 



^^^'^o^'!"^^L''c^^^^;^Si ^""^'^"^^ ^^'^'-'i' Massachusetts, New Jersey. 

 Type locality : North Carolina, ou Caladium sagitiaefolium 



Tex?s"a„T^n™ntrame'5ico°^^ '™'^^ "^^^^^^ ^° «-'^ ^^'^o'^' -"^"^--^ t° P'°"<ia -^ 



31. Nigredo pyriformis (Cooke) Arthur. 



Uromyces pyriformis Cooke ; Peck, Ann. Rep. N. Y. State Mus. 29 : 69. 1878. 

 O and I. Pycnia and aecia unknown. 



II. Uredinia amphigenous, solitary or sometimes more or less confluent in irregular 

 or oval groups, oval or oblong, 0.2-0.4 mm. wide by 0.5-1 mm. or more long, early naked, 

 pulverulent, cinnamon-brown, ruptured epidermis conspicuous ; urediniospores obovoid or 

 ellipsoid, 18-19 by 21-26 /x; wall light cinnamon-brown, 1.5-2 /x thick, evenly and rather 

 moderately echinulate, the pores usually 2, sometimes 3, approximately equatorial. 



III. Telia amphigenous, usually in oval groups 0.7-1.5 by 1.5-5 mm., often confluent, 

 sometimes solitary, oval or oblong, 0.2-0.3 mm. wide by 0.4-1.5 mm. long, early naked, 

 pulvinate, blackish -brown, ruptured epidermis conspicuous ; teliospores obovoid, 13-18 by 

 20-27 m; wall light chestnut-brown, concolorous, 1.5-2/x thick, much thicker above, 5-7 ju, 

 smooth ; pedicel tinted, about length of spore or shorter. 



On Araceae : 



Acortis Calamus I,., Illinois, Iowa, Maine, Michigan, New York, Virginia, Wisconsin ; 

 Ontario. 



Type locality : New York, on Acorus Calamus. 



Distribution : Maine to Virginia, and westward to Iowa and Illinois. 



ExsiccATi: Kllis, N. Am. Fungi 1071; Rab.-Wint. Fungi EJur. 2903; Sydow, Ured. 553; 

 Barth. Fungi Colurab. 3098. 



32. Nigredo Commelinae (Speg.) Arthur. 



Uredo Commelinae Speg. Anal. Soc. Ci. Argent. 9: 172. 1880. 



Uroviyces Commelinae Cooke, Trans. Roy. Soc. Edinb. 31 : 342. 1888. 



Uredo SpegazzimiDo^-To-ni, in Sacc. Syll. Fung. 7: 845. 1888. 



Uredo ochreacea Dietel, Hedwigia 36 : 35. 1897. 



Uredo commehnacea Ellis & Kelsey, Bull. Torrey Club 24 : 209. 1897. 



Uromyces losensis P. Henn. Hedwigia 42 : 107. 1903. 



Uromyces Spegazzinii Arth. Bull. Torrey Club 37 : 573. 1910. 



O and I. Pycnia and aecia unknown. 



II. Uredinia amphigenous and caulicolous, scattered, or somewhat gregarious, some- 

 times circinate, roundish or oval, 0.5-0.8 mm. across, soon naked, cinnamon-brown, pul- 

 verulent, ruptured epidermis conspicuous; urediniospores broadly ellipsoid, 20-26 by 26-35 ^ ; 

 wall rather thick, 2-2.5 ju, dark cinnamon -brown or chestnut-brown, finely echinulate, 

 the pores 2, equatorial. 



III. Telia amphigenous, scattered, roundish or oval, 0.6-1 mm. across, soon naked, 

 pulvinate, chocolate-brown, ruptured epidermis conspicuous ; teliospores ellipsoid or 

 obovoid, 21-24 by 29-35 /i, usually rounded above and below ; wall variable in color, mostly 

 chestnut-brown, 1.5-2 /z thick, thicker above, 8-10 m, with a slightly paler umbo; pedicel 

 nearly or quite colorless, rather thick, about length of spore, sometimes longer. 



On Commelinaceae : 



Commelina angustifolia Michx., Florida. 

 Comm-elina elegans H.B.K., St. Croix. 



Comm-elina erecta Iv., Florida. 

 Comm-elina virginica I^., Florida, Texas. 



Com.m.elina sp.. St. Thomas. 

 Type locality : Recoleta, Argentina, on '^Commelina sulcata,'' said to be error for Trades- 



cantia guyanensts. 



Distribution : Florida and Texas southward ; also in South America, Africa, and Japan, and 

 doubtless throughout the warmer parts of the world, usually in the uredinial stage. 



Exsic'CATi : Barth. Fungi Columb. 2492. 



