48 NORTH AMERICAN FLORA [V01.UME 7 



Spores 25-35 n, occasionally smaller ; with coarse scales. 

 Sori about 3-4 mm. in length. 



Completely destroying the seed. 20. T. pulcherrima. 



Incompletely destroying the seed. 21. T. horrida. 



Sori 1 mm. or less in length. 22. T, Eragi'ostidis, 



1. Tilletia foetens (B. & C.) Trel. Par. Fungi Wise. 35. 1884. 



Ustilago foe tens B. & C. (Rav. Fungi Car. V. 100; hyponyra. 1860) GrevilleaS: 59. 1874. 

 Tilletia laevis Kuhn ; Rab. Fungi Eur. 1697. 1873. 



Sori in ovaries, ovate or oblong, 5-8 mm. in length, more or less concealed by the 

 glumes, all or only part of the ovaries of a spike infected ; spores light- to dark- brown, 

 oblong to chiefly subspherical or spherical, occasionally somewhat angular, foetid especially 

 when young, smooth, chiefly 16-22 /i, the most elongate rarely 28//, in length. 



On Poaceae : 



Triticum vulgare, Colorado, Illinois, Indiana, Iowa, Kansas, Kentucky, Maryland, Massa- 

 chusetts, Michigan, Minnesota, Montana, Nebraska, New Jersey, North Carolina, North 

 Dakota, Ohio, South Dakota, Wiscpnsin, Wyoming ; Manitoba, Northwest Territory. 

 Type locality : North Carolina, on Triticum vulgare. 

 Distribution : Coextensive with the cultivation of wheat. 



Illustrations: Bull. N. Dak. Agr. Kxp. Sta. 27 : f. 2-11 ; Bull. 111. Agr. Exp. Sta. 57: pi. 

 F4, R6, T4 ; Bull. Kan. Agr. Exp. Sta. 8 : pi. 4; Bull. Iowa Agr. Exp. Sta. 54 : /. 120 (5) ; Ann.. 

 Rep. Mass. State Agr. Exp. Sta. 9 : 248, pi. l,f. 6. 



ExsiCCATi: Seym. & Earle, Econ. Fungi 79, C50, C51; Griff. West Am. Fungi 2^, 2,y«, 2,^6/ 

 Ellis, N. Am. Fungi 1497, 3236; Ellis & Ev. Fungi Columb, 647 ; Rav. Fungi Car. V. 100. 



2. Tilletia Tritici (Bjerk.) Wint.; Rab. Krypt. Fl. l' : 110. 1881. 



Lycoperdon Tritici Bjerk. K. Sv. Vet.-Acad. Handl. 36 : 326. 1775. 



Uredo Caries DC. Fl. Fr. 6 : 78. 1815. (Type from France, on Triticum vulgare.) 



Tilletia Caries Tul. Ann. Sci. Nat, III, 7 : 113. 1847. 



Sori in ovaries, ovate to oblong, 5-8 mm. in length, more or less concealed by tlie 

 glumes ; sterile cells few, hyaline, subspherical, -wnth medium thin wall, smaller than spores ; 

 spores chiefly subspherical or spherical, light- to dark-brown, with winged reticulations 

 about 1 fj- high by 2-4 ^ wide, 16-22 fi in diameter. 



On Poaceae : 



Triticum^ vulgare, Arizona, Iowa, Kansas, Michigan, Minnesota, Montana, Nevada, New 

 Jersey, New York, Ohio, Oregon, Washington, West Virginia. 

 Type locality: Sweden, on Triticum. hybernum {T. vulgare). 

 Distribution : locally distributed wherever wheat is cultivated. 



Illustrations: Ann. Sci.' Nat. III. 7: pi. 5, /. 1-16; ibid. IV. 2: pi. 12, f. 1-26; Bull. 

 Iowa Agr. Exp. Sta. 54: /. 120 (i) ; Brefeld, Unters. Gesammt. Myk. 5: pi. 12, f. 25-34, pi. 13 ; 

 Tubeuf, Diseases PI. /. 166, 167 ; Bull. Soc. Nat. Mosc. 40i : pi. 3, /. 22; Jahrb. Wiss. Bot. 7: 

 pi. 9,f. 1-5 ; Plowright, Brit. Ured. Ust. pi. 6,f. 7-13. 



3. Tilletia Elymi Dietel & Holway, Bot. Gaz. 19 : 305. 1894. 



Sori in ovaries, oblong, about 5 or 6 mm. in length, showing between the glumes, 

 upon rupture disclosing dark reddish-brown dusty spore-mass ; spores foetid, showing dif- 

 ferent stages of development, with youngest as hyaline cells smaller than the mature spores 

 which are chestnut-brown, chiefly subspherical or spherical, provided with evident often 

 regular polygonal reticulations (in some varying to irregularly elongate or somewhat cereb- 

 riform), which show at circumference as more or less evident winged projections 1-3 (i in 

 height, 23-28 /i in diameter. 



On Poaceae : 



Elymus glaucus, Montana. 



Elymus sp., Washington. 

 Type locality: Skamania County, Washington, on Elymus sp. 

 Distribution : Montana and Washington. 

 BxsiCCATi : Griif. West Am. Fungi 20?; BHis & Bv. Fungi Columb. 1486. 



4. Tilletia Anthoxanthi Blytt, Forh. Vid.-Selsk. Christ. 



1896': 31. 1896. 



Sori in ovaries, chiefly ovate, about 3 mm. in length, usually infecting all of the 

 flowers of the spike and showing somewhat between the glumes, upon rupture disclosing 

 dusty reddish-black spore-mass ; sterile hyaline cells chiefly smaller than the spores, with 

 thin to medium thick walls ; spores reddish-brown, ovoid to spherical, with usually rather 



