* 



8 NORTH AMERICAN FLORA [Voi^UME 7 



Dakota, Ohio, Oklahoma, Rhode Island, South Dakota, Tennessee, Texas, Vermont, 

 Washington, West Virginia, Wisconsin, Wyoming; Nova Scotia. 



Type locality : Europe, on Avena sativa. 



Distribution : Coextensive with the cultivation of oats. 



Illustrations: Bull. 111. Agr. Exp. Sta. 57 : pi. A3, Sl-2 ; Bull. Conn. Geol. Nat. Hist. Surv. 

 5:/. 43 ; Bull. Kan. Agr. Exp. Sta. 8: pL 1-2; Ann. Rep. Kan. Agr. Exp. Sta. 2: pi. 1, 4,5 ; Bull. 

 Iowa Agr. Exp. Sta. 54: /. 114 {.13') ; Brefeld, Unters. Gesammt. Myk. 11 : pi. l,f. 1-4; Ann. Rep. 

 Mass. State Agr. Exp. Sta. 9: 248, pi, l,f. 1; Tubeuf, Diseases PI./. 156. 



ExsiCCATi: Seym. &Earle, Econ. Fungi (5'2, C 64 ; Shear, N. Y.^ Fungi 82; Ellis & Ev. Fungi 

 Columb. 539; Ellis, N. Am. Fungi 1092, p. p. ; Rav. Fungi Car. II. 99. 



10. Ustilago nuda (Jens.) Kellerm. & Swingle, Ann. Rep. Kan. Agr. 



Exp. Sta. 2: 277. 1890. 



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



Ustilago Hordei Rostr. Overs. K. Danske Vid. Selsk. Forh. 1890 : 10. 1890. 



Ustilagidium Hordei Herzb. in Zopf, Beitr. Phys. Morph. Org. 5 : 7. 1895. 



Sori in spikelets, forming a dusty olive-brown spore-mass, about 6-10 mm. long by 

 half as vnde, temporarily protected by a thin membrane but soon becoming dissipated and 

 leaving the naked rachis behind ; spores lighter- colored on one side, minutely echinulate, 

 subspherical to spherical or occasionally more elongate, 5-9 j" in length. 



On Poaceae : 



Hordeum spp. cult., Connecticut, Illinois, Iowa, Kansas, Maryland, Massachusetts, Michi- 

 gan, Minnesota, Mississippi, Missouri, New Hampshire, New York, North Carolina, 

 Ohio, South Dakota, Texas, Wisconsin ; Nova Scotia ; Mexico. 

 Type locality : Europe, on Hordeum sp. cult. 



Distribution : Coextensive with the cultivation of barley in America and Europe. 

 Illustrations : Bull. 111. Agr. Exp. Sta. 57 : pi. D ; Bull Conn. Geol. Nat. Hist. Surv. 5 : /. 

 47 ; Ann. Rep. Kan. Agr. Exp. Sta. 2 : pi. 2,f. 7- 11, pi. 8 ; BuU. Iowa Exp. Sta. 54 : /. 114 (IS) ; 

 Ann. Rep. Mass. State Agr. Exp. Sta. 9 : 248, pi. 1,/. 2. 



ExsiCCATi : Seym. & Earle, Econ. Fungi 82a, C 77, C 78; Ellis, Ev. & Earth. Fungi Columb. 

 2193. 



11. Ustilago Tritici (Pers.) Rostr. Overs. K. Danske Vid. Selsk. 



Forh. 1890 : 15. Mr 1890. 



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



Ustilago segetum Tritici Jens. Om Korns. Brand 61. 1888. 



Ustilago Tritici Jens.; Kellerm. & Swingle, Ann. Rep. Kan. Agr. Exp. Sta. 2 : 262. Je 1890. 



Ustilago Tritici i. folicola P. Henn. Zeits. Pflanzenk. 4: 139. 1894. 



Ustilagidium. Tritici Herzb. in Zopf, Beitr. Phys. Morph. Org. 5 : 7. 1895. 



Sori in spikelets, forming a dusty olive-brown spore-mass, about 8-12 mm. long by half 

 as wide, usually entirely destroying floral parts and eventually becoming dissipated and 

 leaving behind only the naked rachis ; spores lighter-colored on one side, usually sub- 

 spherical to spherical, occasionally more elongate, minutely echinulate especially on the 

 lighter side, 5-9/^ in length. 



On Poaceae : 



Triticum. vulgare, Alabama, Idaho, Illinois, Indiana, Iowa, Kansas, Massachusetts, 

 Michigan, Minnesota, Missouri, Nebraska, New Jersey, New York, North Carolina, 

 North -Dakota, Ohio, South Dakota, Tennessee, Texas, Vermont, Washington, West 

 Virginia, Wisconsin, Wyoming ; Mexico. 

 Type locality : Europe, on Triticum. vulgare'. 

 Distribution : Coextensive with the cultivation of wheat. 



Illustrations : Bull. 111. Agr. Exp. Sta. 57 : pi. F 1-2, R2, S5; E. & P. Nat. Pfl. li** : 9,/. 

 5A ; Ann. Rep. Kan. Agr. Exp. Sta. 2: pi. 2,f. 1-2, pi. 6; Ann. Rep. Mass. State Agr. Exp. 



Sta. 9 : 248, pi. l,f.3 ; Tubeuf, Diseases PI./. 160. 



ExsiCCATi : Underw. & Cook, Illustr. Fungi 5(5; Seym. & Earle, Econ. Fungi 80; ElHs & 

 Ev. Fungi Columb. 1369; Sydow, Ust. 167 ; Kellerm. Ohio Fungi 42 ; Griff. West Am. Fungi 22. 



12. Ustilago MuMenbergiae P. Henn. Hedwigia Beibl. 



41 : 61. Ap 1902. 



Ustilago MuMenbergiae Clinton, Jour. Myc. 8 : 133. 1902. (Type from Arizona, on Muhlenbergia 

 texana. ) 



Sori in the abortive inflorescence, ovoid to subspherical, about 3-6 mm. in length, pro- 



L 



tected by thin semitransparent membrane of the infected floral parts, upon rupture disclos- 

 ing a black-brown dusty spore-mass ; spores rather dark reddish-brown, chiefly spherical, at 

 first apparently smooth, but with age or approaching germination splitting off caps on 



