Tart 3, 1912] AECIDIACEAK 



255 



On Fabacbae : 



Trifolium incamatum I^., Delaware, South Dakota. 

 Irtfohum medium L., Nebraska, South Dakota 



^^'"M^irr '^''^^?''^^^';/^^^l'^^' Colorado, Delaware, Illinois, Indiana, Iowa, Kansas, 



Maine, Maryland^ Massachusetts, Mississippi, Missouri, Nebraska, New York, North 



Larolina, Ohio Pennsylvania, South Carolina, South Dakota, Tennessee, West Vir- 



ginia ; British Columbia, Nova Scotia, Quebec. 



Type locality :I,ille, France, "in foliis Trifoliorum " ITrifoHum pratense-] . 



irc.^^^^^Zll^^^ •■ ^'l ^\l ^^^^^'^HS Lagopus throughout the eastern United States and Canada 



1^ Si^^L^ ^^?^^'''® ^"^ ^^^ Atlantic coast, and in one locality in the Selkirk mountains ; also 

 in iiurope ana Asia. ' 



ni,^??f,'^^wJ/)' ^i^'^ ^ Ev Fungi Columb. 173, 340, 2190; Earth. Fungi Columb. 2997; Kellerm. 

 Ohio Fungi 140; Seym. & Karle, Econ. Fungi J.?7 (in part), 512; D. Griff. W. Am. Fungi 92. 



60. Nigredo Trifolii (Hedw. f.) Arth. R&ult. Sci. Congr. 



Bot. Vienne 344. 1906. 



Puccinia Trifolii Hedw. f.; DC. Fl. Fr. 2 : 225. 1805. 

 Uredo Fabae Trifolii Alb. & Schw. Consp. Fung. 127. 1805. 

 Uredo Trifoht DC; Poir. in I,am. Encyc. 8 : 223. 1808. 

 Aectdtum Trtfolii-repentis Cast. Obs. 1 : 33. 1842. 

 Uromyces Trifolii X,t^ . Ann, Sci. Nat. III. 8: 371. 1847. 

 Trie hob asts fallens Cooke, Micr. Fungi ed. 2. 225. 1870. 

 Uromyces Trifolii-repentis Uro, Acta Soc. Faun. Fl. Fenn. 296 : 15. 1906. 



0. Pycnia chiefly epiphyllous, in small groups or sometimes spread out over larger 

 areas, not conspicuous, honey-yellow becoming reddish-brown, globoid, 100-130 y. in 

 diameter ; ostiolar filaments up to 30 ju long. 



1. Aecia amphigenous, in roundish crowded groups or on the veins and petioles in elon- 

 gate groups, short, cupulate, 0.2-0.3 mm. in diameter; peridium white, the margin erect 

 or slightly recurved, fi.nely erose ; peridial cells rhomboidal, slightly overlapping, 13-15 ju 

 broad by 18^26 ju long, the outer wall rather thick, 5-6 /x, transversely striate, smooth, the 

 inner wall thinner, 2-3 /x, moderately verrucose ; aeciospores broadly ellipsoid or somewhat 

 Angular, 15-17 by 16-21 \i ; wall light-yellow, or nearly colorless, thin, about 1 ju, finely 

 verrucose. 



II. Uredinia amphigenous, scattered, oval or roundish, 0.3-0.6 mm. in diameter, rather 

 tardily naked, pulverulent, cinnamon-brown, ruptured epidermis conspicuous; uredinio- 

 spores broadly ellipsoid, 18-21 by 21-26 ju; wall golden-brown, rather thin, about 1.5 /x, 

 rather sparsely echinulate, the pores 3 or 4, equatorial. 



III. Telia chiefly hypophyllous, scattered, oval or roundish, variable in size, 0.3-0.8 



mm. or more in diameter, rather tardily naked, somewhat pulverulent, chestnut-brown, 



ruptured epidermis conspicuous ; teliospores broadly ellipsoid or obovate-ellipsoid, 13-19 



by 20-29 /x; wall cinnamon-brown, rather thin, about 1.5 yx, with a small hyaline papilla 



over the germ-pore, smooth, or with a few, small, sparsely scattered papillae ; pedicel 



colorless or slightly tinted, short. 



On Fab ace ae : 



Trifolium amabile H.B.K., Mexico (state), Veracruz. 



Trifolium. arnphianthum, T. & G., Texas. 



Trifolium hybridum I,., Alabama, Connecticut^ Indiana, Maine, Massachusetts, Michigan, 



New York, South Dakota, Vermont, "Washington, West Virginia. 

 Trifolium. incamatum. ly., Wisconsin. 

 Trifolium Logani House, Hidalgo. 



Trifolium repens L., Colorado, Connecticut, District of Columbia, Illinois, Indiana, Iowa, 

 Maine, Massachusetts, Minnesota, Montana, Nebraska, New York, North Dakota, 

 Pennsylvania, Utah, Vermont, West Virginia, Wisconsin ; Newfoundland ; Jamaica. 

 Type locality: Fontenai-aux-Roses, France, on " trefle rampant" {Trifolium repens\. 

 Distribution : On the subgenus Trifoliasirum chiefly, from Newfoundland to Washington 

 southward to the West Indies and central Mexico, rare in the southeastern states and on the Pacific 

 coast ; also in Kurope, Asia, and Australia. 



Illustration : Beitr. Krypt. Schweiz 2'^: f 19. , „ . „, , ^ . -r^ 



FxsiCCATi: Garrett, Fungi Utah. 121; Brenckle, Fungi Dak. 74; Clements, Crypt Form. 

 Colo. 541; D. Griff. W. Am. Vxin^i 266; Ellis, N. Am. Fungi 1444; Ellis & Ey. Fungi Columb 

 2191; Earth. Fungi Columb. 2495, 3197, 3498, 3596, 3597 ; Seym. & Earle, Econ. Fungi 509a, b, 513. 



61. Nigredo Coluteae Arthur. 



Uromyces Coluteae Arth. Bull. Torrey Club 37 : 574. 1910. 

 O and I. Pycnia and aecia unknown. 



