Part 1, 1906] USTII^AGINACEAB 



11 



On Poaceae : 



Lycurusphleoides, Arizona. 



^rilo^^^o^'^L^^^usp^^^ "^''^ ^^ Greaterville on road to Rosemont, Santa Rita Mountains, 



Distribution; Arizona. 

 Illustration : Bull. Torrey Club 31 : 85. f. 11, 12. 



19. Ustilago Rickerii Clinton, sp. nov. 



Sori in the ovaries, apparently infecting all in the inflorescence, ovoid to snbspherical , 

 about 3-6 mm. in length, covered by a smooth membrane of plant tissue that upon rupture 

 discloses the olive-black dusty spore-mass ; spores reddish-brown, ovoid to chiefly sub- 

 spherical or spherical, contents usually guttulate, apparently smooth, but under an immer- 

 sion lens usually minutely and sparsely granular-echinulate, 5.5-9 ^ in length. 



On Poaceae : 



Panicum paspaloides ^ Cuba. 



^ JTyP^ collected in Batabano, Cuba, March, 1906, by A. S. Hitchcock, and communicated by P. 

 ly. Ricker as an interesting species. 



20. Ustilago Panici-proliferi P Henn. Bot. Gaz. 28 : 274. 1899. 



Sori in the inner folded leaves and possibly also aborting the inflorescence, elongate, 

 chiefly 3-8 cm. in length, often thickest at base, more or less enveloped by leaf-sheaths, 

 covered with a thin transparent membrane that soon ruptures, exposing the dusty olive- 

 black spore-mass surrounding the prominent, elongate remains of the plant tissues ; spores 

 olive-brown, chiefly ovoid to spherical, contents often punctate, smooth, 7-10 ii in length. 



On Poaceae : 



Pamcunt paspaloides, Mexico. 



Panicum proliferum acuminatum, Mexico. 

 Type locality : City of Mexico, on Panicum^ proliferum acum-inatum.. 

 Distribution : Mexico. 

 ExsiCCATi: Sydow, Ust. 212 ; Seym. & Karle, Econ. Fungi C 143. 



21. Ustilago Ulei P. Henn. Hedwigia 34: 88. 1895. 



Sori in the leaves, rather indefinite, in striae or often involving more or less of the 

 inner surface of the blades as folded together, eventually causing them to become some- 

 what shredded and the olive-black dusty spore-mass to become scattered ; spores reddish- 

 brown, often with thin walls (such spores easily collapsing when dry), usually snbspherical 

 or spherical, smooth or very minutely punctate- verruculose, 8-11 ," in diameter. 



On Poaceae : 



Chloris subm.uiica, Mexico. 

 Type locality : Goyaz, Brazil, on Chloris sp. 

 Distribution : Mexico ; also in South America . 

 Illustration: Brefeld, Unters. Gesammt. Myk. 12: pi. 7,f. 14-18. 



22. Ustilago chloridicola P . Henn. Hedwigia 37 : 267. 1898. 



Sori in the inflorescence, linear, often about 3 cm. in length, causing more or less 

 shredding of the infected tissues, with dusty olive-black spore-mass that becomes scattered ; 

 spores reddish-brown, often irregular, oblong or elliptical to spherical, apparently mi- 

 nutely verruculose, but punctate-reticulate under an immersion lens, 6-11 M in length. 



On Poaceae : 



Chloris sp., California. 

 Type locality : Potter Valley, Mendocino County, California, on Chloris sp. 



Distribution : California. 



2?>. Ustilago Tillandsiae Patters.; Clinton, Jour. Myc. 8 : 135. 1902. 



Sori destroying inner flower parts, protected by enclosing bracts and perianth, form- 

 ing an irregular dusty black spore-mass about 1-3 cm. in length; spores olive-brown, 

 chiefly ovoid to spherical, thin-walled, more or less collapsed or hemispherically cupped, 

 smooth or with brittle epispore breaking up into thin polygonal areas, 7-13 ^ in length. 



On Bromeliaceae : 



Tillandsia Leiboldiana, Mexico. 



Tillandsia sp . , Costa Rica. 

 Type locality : Costa Rica, on Tillandsia sp. 

 Distribution : Mexico and Costa Rica. 



