6 NORTH AMERICAN FLORA [V01.UME 7 



Type locality : Vicinity of Berlin, Germany, on Elymus arenarius. 



Distribution : Connecticut ; Illinois to Texas, California, and Washington ; also in South 

 America, Europe, Asia, and Africa. 



Illustrations: Ann. Sci. Nat. III. 7: pi. 3,f.U; Bull. Torrey Club 29: 291,/. 5; Bull. 

 Iowa Agr. Bxp. Sta. 54 : /. 114 {15) , 117 ; Rev. Myc. 12 : pi. 19, /. 275, 276 : Flora 83 : pi. J, /. 7 ; Bull. 

 Soc. Nat. Mosc. 40^ : pl.J,f. 1. 



ExsicCATi : Griff. West Am. Fungi J, 201, 233, 234, 235, 236, 306; Seym. & Karle, Keen. Fungi 

 C 71; Ellis & Ev. N. Am. Fungi 3135; Ellis & Ev. Fungi Columb. 537, 1899; Sydow, Ust. 210. 



3. Ustilago longissima (Sow.) Tul. Ann. Sci. Nat. 



III. 7: 76. 1847. 



Ly coper don filiforme Schrank, Bot. Tasch. Hoppe 1793: 69. 1793. (Type from Bavaria, on Poa 



aquaiica.) 

 Uredo longissima Sow. Engl. Fungi ^/. 139. 1798. 

 Ustilago Jiliformis Rostr. Fests. Bot. For. KJ0b. 136. 1890. 



Sori in leaves, forming more or less distinct and linear groups from a few mm. to 

 length of the leaf, soon rupturing epidermal covering and the reddish-brown spore-mass 

 becoming scattered from the more or less shredded tissues ; spores light-brown, oblong or 

 ellipsoidal to spherical, smooth or scarcely granular under an immersion, 4-8// in length. 



On Poaceae : 



Panicularia a-mericana {Glyceria grandis), Connecticut, Iowa, Massachusetts, Michigan, 



Minnesota, New York, Vermont, Wisconsin. 

 Panicularia {Glyceria) sp., New Hampshire. 

 Type locality: Ivambeth Marsh, England, on Poa aquaiica {Panicularia aquatica). 

 Distribution : New England to Minnesota and Iowa ; also in South America, Europe, and Asia. 

 Illustrations : Bull. Conn. Geol. Nat. Hist. Surv. 5 : /. 1; Bull. Iowa Agr. Exp. Sta. 54 : /. 

 114 {17) ; Brefeld, Unters. Gesammt. Myk. 5 : pi. 8, pi. 9,f. 8-16; Rev. Myc. 12 : pi. 19,/. 282-284; 

 Bull. Soc. Nat. Mosc. 40^ : pl.3,f.2; Plowright, Bnt. Ured. Vst.pl. 7,f. 14-16. 



ExsiCCATi : Ellis & Ev. N. Am. Fungi 1096 ; Ellis & Ev. Fungi Columb. 469 ; Seym. & Earle, 

 Econ. Fungi 5^7, C73, €74. 



Ustilago longissima macrospora Davis, Trans. Wise. Acad. 11 : 174. 1897. Spores similar, some- 

 what more irregular and angled, apparently smooth but under an immersion minutely granular, 

 7-12jLt in length. On Poaceae: Panicularia fluitans (^Glyceria ^uilans), Illinois, Maine, Wis- 

 consin. Panicularia lax a {G. laxa), Maine. ExsiCCATi : Ellis & Ev. N. Am. V\m%i3235 ; Seytn. 

 & Earle, Econ. Fungi 54^0, C 75 ; Sydow, Vst. 253. 



4. 'Ustilago calcara Griff. Bull. Torrey Club 31 : 2,5. 1904. 



Sori in the leaf-sheaths, occasionally in the blades, extending between the veins and 

 rupturing upon the exterior, circular, 0.5 mm. in diameter, or linear through confluence and 

 then often 5 mm, or more in length; spores light to dark reddish-brown, irregular, ovate 

 to subspherical , often pointed, with thin smooth walls, chiefly 8-11 /i in length. 



On Poaceae : 



Bouteloua brevisela. New Mexico. 

 Type locality : Roswell, New Mexico, on Bouteloua breviseta. 



Distribution : New Mexico. 



Illustration : Bull. Torrey Club 31 : 85,/. 8. 



5. Ustilago mexicana Ellis & Ev. Jour. Myc. 3 : 56. 1887. 



Sori in the individual spikelets usually infecting all, ovate, small, about 1 mm. in 

 length, more or less concealed by the enveloping glumes; spores reddish-brown, often 

 lighter-colored on one side due in part to the thinner wall, ovoid to spherical or somewhat 

 angular and irregular, smooth, 5.5-8 /^ in length. 



On Poaceae : 



Muhlenbergia sp., Mexico. 

 Type locality : Mountains near Batopilas, Mexico, on Muhlenbergia sp. 



Distribution : Mexico. 



BxsiCCATi : Ellis & Ev. N. Am. Fungi 1891. 



6. Ustilago Hordei (Pers.) Kellerm. & Swingle, Ann. Rep. Kan. 



Agr. Exp. Sta. 2 : 268. 1890. 



Uredo segetum Hordei Pers. Tent. Disp. Fung. 57. 1797. 



Ustilago Hordei tecta Jens. Charb. C^r^ales 4. 1889. 



Ustilago J ensenii Rostr. Overs. K. Danske Vid. Selsk. Forh. 1890 : 12. 1890. 



Sori in spikelets, forming an adhering purple-black spore-mass, about 6-10 mm. in 

 length, covered rather permanently by the transparent basal parts of the glumes ; spores 



