p\RT 3, 1912] ae;cidiace;ae; 243 



On Rtjbiaceae : 



tHoustonia angustifolia Michx., Kansas, Texas. 



Housioma caerulea I.., Connecticut, Delaware, Massachusetts, Missouri, Pennsylvania. 

 West Virginia. i j } 



"? Hoiistonia minima Beck, Texas. 



} Houstonia purpurea I,., West Virginia. 



II. Uredinia atnphigenous, arranged in small groups, oblong or linear, 0.3-0.8 mm. 

 long, early naked, somewhat pulverulent, very pale cinnamon-brown, ruptured epidermis 

 noticeable; urediniospores broadly ellipsoid, 16-19 by 23-26 m ; wall golden-brown, 1.5-2 m 

 thick, sharply and strongly echinulate, the pores 3, rarely 4, equatorial. 



III. Telia amphigenous, arranged in longitudinal lines, sometimes confluent, about 

 0.1-0.2 mm. wide by 0.3-0.8 mm. long, soon naked, cinnamon-brown, or paler from germi- 

 nation of the spores, pulvinate, ruptured epidermis noticeable ; teliospores narrowly ellipsoid, 

 obtuse or acute at both ends, 12-17 by 28-34; wall pale-yellow, smooth, thin, l/z, thicker 

 above, 4-9/1 ; pedicel hyaline, one to one and a half times length of spore. 



On Iridaceae : 



Sisyrinchium. angusHfolium Mill., Maine. 



Sisyrinchium gramineum Curtis (5. graminoides Bickn.), West Virginia. 

 Type locality: Bethlehem, Pennsylvania, on Housionia caerulea. 



Distribution : Along the Atlantic coast from Maine to West Virginia, and in Missouri pos- 

 sibly also from Kansas to Texas. 



ExsicCATi: Bllis, N.Am. Fungi 1422; Rab.-Wint.-Paz. Fungi Eur. 3936 0')\ Barth. Funei 

 Columb. 2403. 



42. Nigredo proba Arthur. 



Uromyces probus Arth. Bull. Torrey Club 38 : 376. 1911. 



0. Pycnia not seen. 



1. Aecia amphigenous, on the veins in series or rows 1-3 mm. long, short, cupulate, 

 0.3-0.4 mm. in diameter ; peridium colorless, erect or spreading, the margin erose ; peridial 

 cells rhomboidal, 28-35 /x long, the outer wall rather thick, 4-6 ju, transversely striate, the 

 inner wall about 3/i thick, moderately verrucose ; aeciospores broadly ellipsoid, 18-21 by 

 23-26 m; wall colorless, thin, about 1.5 /x, finely verrucose. 



II. Uredinia amphigenous, solitary or often in crowded groups 2-8i. mm. across, some- 

 times confluent, oblong or linear, 0.5-5 mm. long, rather soon naked, somewhat pulveru- 

 lent, light cinnamon -brown, ruptured epidermis conspicuous ; urediniospores broadly 

 ellipsoid, 19-23 by 26-31 \i ; wall golden-yellow, moderately thick, 2-3 m, sparsely echinulate 

 with fine short points, the pores 5 or 6, scattered. 



III. Telia usually amphigenous, thickly scattered, numerous, sometimes in series, oblong 

 or linear, 0.5-4 mm. or more long, rather tardily naked, pulvinate, chocolate-brown, rup- 

 tured epidermis conspicuous ; teliospores broadly ellipsoid or obovate-ellipsoid, 16-21 by 

 23-29 ju; wall dark cinnamon-brown, thin, about 1.5/*, slightly thicker at apex, 2-3 m, 

 smooth ; pedicels very slightly tinted, usually shorter than spore. 



On Iridaceae : 



Olsynium grandiflorum (Dougl.) Raf. {Sisyrinchium grandiflorum Dougl.), Idaho, 



' Washington. 



Type locality : Columbia River, Washington, on leaves of Olsynium grandiflorum. 



Distribution : Northwestern part of the United States. 



KxsiccATi : Ellis & Ev. Fungi Columb. 546; Ellis & Ev. N. Am. Fungi J7J7. 



43. Nigredo Polygoni (Pers.) Arth. R&ult. Sci. Congr. Bot. 



Vienne 344. 1906. 



Puccinia Polygoni Pers. Neues Mag. Bot. 1 : 119. 1794. 



Puccinia Poly goni- Aviculariae Pers. Syn. Fung. 227. 1801. 



Uredo Centumnodii Schum. Enum. PI. Saell. 2: 231. 1803, 



Puccinia Aviculariae DC Fl. Fr. 2 : 221. 1805. 



Dicaeoma Aviculariae S. F. Gray, Nat. Arr. Brit. PI. 1 : 542. 1821. 



Capitularia Polygoni Rab. Bot. Zeit. 9 : 4^9. 1851. 



Uromyces Polygoni Fuckel, Symb. Myc. 64. 1869. 



Uromyces Aviculariae Schrot. Abh. Schles. Ges. 48 : 8. 1870. 



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



O. Pycnia amphigenous, few, in small groups about 0.5 mm. across, inconspicuous, 

 honey-yellow becoming brownish, depressed-globoid, 112-144^ in diameter, 75-100 m high ; 

 ostiolar filaments 75-90 ju long. 



