Part 1, 1906] USTILAGINACBAE 9 



opposite sides of epispore and these eventually breaking up into small granular echinula- 

 tions thus leaving a dark, less broken central band, 4-6 /i in diameter. 

 On Poaceae : 



Muhlenbergia Porteri {M, iexana), Arizona. 



Muhlenbergia Frtnglei, New Mexico. 

 Type locality : Hot Springs, New Mexico (not Mexico, as stated) , on Muhlenbergia Pringlei. 

 Distribution : New Mexico and Arizona. 

 ExsicCATi : Seym. & Karle, Econ. Fungi C 142. 



13. Ustilago residua Clinton, Jour. Myc. 8 : 133. 1902. 



UsHlago segetum f. Danihoniae Ellis & Ev. N. Am. Fungi 1893a; hyponym. 1887. 



Sori in the inflorescence, prominent, infecting the whole or sometimes confined to the 

 individual spikelets, usually enclosed by leaf -sheaths, on exposure showing as an olive-brown 

 dusty spore-mass ; spores rather light olive-brown, ovoid or ovate to spherical or occasion- 

 ally irregular, thin-walled, wdth coarse granules giving granular-reticulate appearance 

 under an immersion, usually 5.5-8.5//, sometimes even 11//, in length. 



On Poaceae : 



Danthonia californica, California. 



Danthonia compressa, New York. 



Danthonia intermedia, California, Wyoming. 



Danthonia spicata, New Hampshire. 



Danthonia unispicata, California. 



Danthonia sp., Colorado. 

 Type locality: New Hampshire, on Danthonia spicata. 

 Distribution : New Hampshire, New York, Colorado, Wyoming, and California"; also in 



ExSicCATi : Seym. & Earle, Econ. Fungi C 146 ; Ellis & Ev. N. Am. Fungi 1893a. 



affinis 



1893. 



Ustilago Hilariae P. Henn. Hedwigia 37 : 267. 1898. (Type from Mexico, on Hilaria cenchroides.^ 



Not U. Hilariae Ellis & Tracy. 1890. 

 Ustilago Stenoiaphri P. Henn. Hedwigia 37: 293. 1898. (Type from Cape Colony, on Steno- 



tcLphrum glabrutn.') Not U. Stenoiaphri McAlpine. 1895. 

 Ustilago americana Speg. Anal. Mus. Nac. Buenos Aires 6 : 207. 1899, (Type from La Plata, 



Argentina, on Stenotaphrum glabrum.) 

 UsHlago StenotaphriM.iiBS^^, Kew Bull. 1899 : 184. 1899. (Type from Bermuda, on Stenotaphrum 



glabruTU . ) 

 Ustilago Henningsii Sacc. & Sydow ; Sacc. Syll. Fung. 16: 368. 1902. 



Sori in spikelets, usually infecting all, which are sometimes slightly merged, at first 

 more or less hidden by enveloping leaves, protected by a thin transparent membrane but this 

 soon rupturing and the olive-brown spore-mass scattering until there remains only the naked 

 rachis; spores light reddish-brown, oblong or ovate to chiefly subspherical or spherical, 

 often slightly angled, smooth, 5.5-9// in length. 



On Poaceae : 



Hilaria cenchroides, Mexico. 



Stenotaphrum secundatum {S, americanum) , Bermuda, Jamaica. 

 Type locality : Mandeville, Jamaica, on Stenotaphrum amertcanum {S. secundatum). 

 Distribution : Bermuda, Jamaica, and Mexico ; also in South America and Africa. 



15. Ustilago Lorentziana Thiim. Flora 63: 30. 1880. 



UsHlago Holwayi Dietel, Bot. Gaz. 18 : 253. 1893. (Type from California, on Hordeum pratense.) 

 Sori in spikelets, usually infecting all of a spike, rather completely destroying their 

 parts except the awns, protected at first by a thin transparent membrane which easily rup- 

 tures disclosing a 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 minute verruculations, chiefly 7-12 /^ in 



length. 



On Poaceae : y^"'^'^ 



Hordeum caespitosum ^^^^^^ , , ^^ .i. -r^ i 4. n^ i, 



Hordeum jubatum, MoifEana, North Dakota, South Dakota, Utah. 



Hordeum ■mariiifnum, Idaho. 



Hordeum murinum, Calif OTnia. 



Hordeum nodosum {H. pratense), California,^Jtah^ 



Hordeum pusillum, California. 



Hordeum sp., California, Washington. 



