Part 3, 1912] AECIDIACBAE 



259 



II. Uredmia amphigenous, scattered, round, 0.2-0.5 mm. across, soon naked, pale 

 cmnamon-brown, pulverulent, ruptured epidermis inconspicuous ; urediniospores globose, 

 18-21 /x m diameter; wall cinnamon-brown, 1.5-2 m thick, minutely and closely echinulate, 

 the pores 4, equatorial. 



III. Telia amphigenous, scattered, round, 0.2-0.5 mm. across, soon naked, cinnamon- 

 brown, pulverulent, ruptured epidermis inconspicuous; teliospores oblong or oblong- 

 lanceolate, 10-15 by 26-32 M, narrowed toward both ends ; wall pale golden-brown, smooth, 

 thin, 1 /* or less, thicker at apex, 3-6 m, with a nearly colorless umbo ; pedicel slender, half 

 length of spore, nearly colorless. 



On Fabaceae : 



DolichoLus texanus (T. & G.) Vail {Rhynchosia texana T. & G.), Texas. 

 Type locality: San Angelo, Texas, on Dolicholus texanus. 

 Distribution : Known only from the type locality ; or possibly also in South America, 



68. Nigredo Galphimiae (Dietel & Holway) Arthur. 



Uromyces Galphimiae Dietel & Holway; Holway, Bot. Gaz. 24 : 25. 1897. 



0. Pycnia epiphyllous, gregarious, inconspicuous, punctiform, golden-brown, globoid, 

 110-130 ju in diameter. 



1. Aecia hypophyllous, loosely gregarious, roundish, 0.3-0.6 mm. in diameter, brownish- 

 yellow, deep-seated, ruptured epidermis inconspicuous ; peridium rather firm ; peridial cells 

 oblong, about 40 M long, overlapping, the outer wall rather thick, 4-5 m, transversely striate, 

 the inner wall somewhat thinner, moderately verrucose ; aeciospores broadly ellipsoid or 

 obovate-globoid, 21-24 by 27-32 ju; wall colorless, 1.5-2 ju thick, closely and strongly 

 verrucose. 



II. Uredinia chiefly hypophyllous, numerous, scattered or somewhat gregarious, 

 round, 0.2-0.5 mm. across, tardily naked, cinnamon -brown, ruptured epidermis noticeable ; 

 urediniospores globoid or ellipsoid, 23-28 by 27-31 /x; wall pale golden-brown, rather thin, 

 1-1. 5ju, strongly echinulate with conical points, the pores obscure, apparently 2, equatorial, 



III. Telia amphigenous, scattered, roundish, 0.2-0.5 mm. across, tardily naked, 



blackish, pulverulent, ruptured epidermis conspicuous ; teliospores globoid, ellipsoid or 



obovate, 24-29 by 32-A3(m, obtuse at apex ; wall chestnut-brown, thick, 4-6 m, thicker at apex, 



9-1 2ju , including a conspicuous lighter umbo, finely and evenly verrucose ; pedicel hyaline, 



one to one and a half times length of spore. 



On Malpighiackae : 



Thryallis Humboldtiana (Bartl.) Kuntze {Galphiynia Humboldtiana Bartl.), Jalisco. 

 Type locality : Guadalajara, Mexico, on Galphimia Humboldtiana. 

 Distribution : Western Mexico. 

 Illustration : Sydow, Mpnog. Ured. 2 : pi. 5^f. 88. 

 ExsiccATi : Sydow, Ured. 2006. 



69. Nigredo proeminens (DC.) Arthur. 



Uredo proeminens DC. Fl. Fr. 2 : 235. 1805. 



Aecidium Euphorbiarum Chamaesycis Duby, Bot. Gall. 2: 907. 1830. 



Caeoma {Aecidium) Euphorbiae-hypericifohae Schw. Trans. Am. Phil. Soc. II. 4 : 293. 1832. 



Aecidium {Caeoma) Euphorbiae-hypericifoliae Schw. Trans. Am. Phil. Soc. II. 4: 309. 1832. 



Trichobasis euphorbiaecola Berk. & Curt. Jour. Ivinn. Soc. 10: 357. 1869. 



Uromyces Euphorbiae Cooke & Peck ; Peck, Ann. Rep. N. Y. State Mus. 25 ; 90. 1873. 



Uromyces proeminens Pass.; Rab. Fungi Eur. 1795. 1873. 



Uromyces Chamaesycis Sacc. Atti Accad. Sci. Padova 24 : 199. 1874 ; Hedwigia 14 : 192. 1875. 



Uromyces Myristica Berk. & Curt.; Berk. Grevillea 3 : 57. 1874. 



Uromyces pulvinatus Kalchb. & Cooke, Grevillea 9 : 21. 1880. 



Uromyces Euphorbiae minor Arth. Bull. Minn. Acad. Sci. t^ : 28. 1883. 



Uredo euphorbicola De-Toni, in Sacc. Syll. Fung. 7 : 847. 1888. 



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



Uromyces Euphorbiae subcircinalus Ellis & Ev. N. Am. Fungi J^^5. 1894. 



Uromyces Ellisianus P. Henn. Hedwigia 37 : 269. 1898. 



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



Ni^edo Euphorbiae-hypericifoliae Axth.. R6sult. Sci. Congr. Bot. Vienne 343. 1906. 



Uromyces euphorbiicola Tranz. Ann. Myc. 8 : 8. 1910. 



Uromyces Poinsettiae Tranz. Ann. Myc. 8 : 11. 1910. 



O. Pycnia hypophyllous, widely scattered among the aecia, rather few, punctiform, 

 honey-yellow becoming brownish, globoid, 130-145 ;u in diameter; ostiolar filaments up to 



65 m long. 



