CLINTON: NORTH AMERICAN USTILAGINEAE. 
349 
Ustilago Lorentziana Thtim. 
Ustilago Lorentziana 1 Thtim., Flora, 1880 : 30. 1880. 
Ustilago Holwayi Diet., Bot. Gaz., 18 : 253. 1893. 
Exsiccati: Ustilago Holwayi Diet., on Hordeum nodosum, Syd., Ust., 
206; on Hordeum pratense, Syd., Ust., 9 ; on Hordeum sp., Syd., Ust., 154; 
Ustilago Hordei (Pers.) Kell. & Sw., on Hordeum maritimum, Ell. & Ev., 
Fungi Col., 1281; Ustilago Lorentziana Thtim., on Hordeum jubatum, Ell. 
& Ev., N. A. Fungi, 2702, Griff., West Amer. Fungi, 192. 
Sori in spikelets, usually infecting all of a spike, rather completely 
destroying their parts except the awns, protected at first by thin 
transparent membrane which easily ruptures disclosing dusty purple 
black spore mass; spores rather dark olive brown, ovoid to spherical 
or sometimes with more irregular and angular forms, with a brittle 
epispore that breaks up into more or less irregular granules or min¬ 
ute verruculations, chiefly 7-12 p in length. 
Hosts; Hordeum jubatum, Mont., N. Dak., S. Dak.; II. mariti¬ 
mum, Ida.; II. murinum , Calif.; H. pratense, Calif, (type U Hol¬ 
wayi), Utah; Hpusillum, Calif.; Hordeum sp., Calif., Wash. 
Ustilago Holwayi is not distinct from Ustilago Lorentziana. 
Dietel says it differs in the shape of the epispore. The only dif¬ 
ference the writer makes out, and this does not exist uniformly, 
seems to be in the more brittle epispore of Ustilago Holwayi which 
often breaks up into rather coarse irregular granules, while Ustilago 
Lorentziana in the specimens issued by de Thfimen has spores with 
a more distinct verruculose character. The germination apparently 
has not been reported. Literature : 29. 
Ustilago bromivora (Tul.) Fisch. d. Waldh. 
Ustilago Carbo a vulgaris d bromivora Tul., Ann. Sci. Nat., Bot., in, 7 : 
81. 1847. 
Ustilago bromivora Fisch. d. Waldh., Bull. Soc. Nat. Mosc., 40 1 : 252. 1867. 
Cintractia Patagonica Cke. & Mass., Grev., 18 : 34. 1889. 
Exsiccati : Ustilago bromivora Fisch de Waldh., on Bromus arvensis, Ell. 
& Ev., N. A. Fungi, 3052; on Bromus marginatus , Syd., Ust., 202, Griff., West 
Amer. Fungi, 206, 206 a; on Bromus racemosus, Syd., Ust., 102 ; on Bromus 
secalinus , Ell. & Ev., Fungi Col., 536, Griff., West Amer. Fungi, 204; on 
Bromus vulgaris, Griff., West Amer. Fungi, 205; on Bromus sp., Seym. & 
Earle, Econ. Fungi, 534, Seym. & Earle, Econ. Fungi, Clinton Ust. Supp. C 65. 
1 Also described in de Thiimen’s Myc. Uni., 1711. 1880. 
