Part 1, 1906] USTII^AGINACEAB 43 



smooth and apparently hyaline, very irregular, clavate to subspherical, 12-18 fJ-, or the most 

 elongate forms even 30 //, in length. 



On Amaranthaceae : 



Cladothrix lanuginosa^ Arizona. 



Type locality : Santa Rita Mountains, four miles north of Helvetia, Arizona, on Cladothrix 

 lanuginosa. 



Distribution : Known only from the type locality. 

 Illustration : Bull. Torrey Club 31 : 85, / 9, 10. 



9. Thecaphora aterrima Tul. Ann. Sci. Nat. III. 7 : 110. 1847. 



SorospoHum atrum Peck, Bot. Gaz. 5 : 35. 1880. (Type from Colorado, on Carex pennsylvanica.) 

 Tolyposporium aterrimum Dietel, in B. & P. Nat. Pfl. 1^** : 14. 1897. 



Sori rather indefinite, at inner base of bracts of staminate spikes, hidden from view- 

 but on removal of bracts showing as black granular spore-masses, more rarely filling the 

 perigynia (according to Peck) ; spore-balls usually black-brown, opaque, ovoid to spherical, 

 firm, composed of 2-12 or rarely more spores, 17-35 ^, rarely 50 //, in length ; spores dark 

 reddish-brown, triangular, semipolygonal or semicircular in cross-section, more or less 

 obscurely papillate on free surface, chiefly 10-16 \i in length. 



On Cyperaceae : 



Carex adusta, Iowa. 



Carex pennsylvanica y Colorado, Kansas. 



Carex sp., Iowa. 

 Type locality: France, on Carex prae cox. 



Distribution : Iowa, Kansas and Colorado ; also in Europe and Africa. 

 Illustrations : Ann. Sci. Nat. III. 7 : pL 4 J, 20-22; Mem. Acad. Sci. Bologna IV. 10 : 703. 



9. TOLYPOSPORELLA Atk. Bull. Cornell Univ. 3' : 16. 1897. 



Sori usually on the leaves, forming a black granular agglutinated coating ; spore-balls 

 variable, sometimes indefinite ; spores dark-colored, provided with a very thick, often sac- 

 like, epispore, usually of medium size ; germination by a branched septate promycelium 

 producing single lateral sporidia. 



Type, Tolyposporella Chrysopogonis Atk. 



Sori composed of definite spore-balls. 1. T. Chrysopogonis. 

 Sori composed of spores rather indefinitely agglutinated. 



Sori hidden on inner surface of leaf -sheaths. 2. T. Brunkii. 



Sori on exposed surface of leaves. 3. T. Nohnae. 



1. Tolyposporella Chrysopogonis Atk. Bull. Cornell Univ. 3^: 16. 1897. 



Sori on inner surface of leaf-sheaths by which they are concealed, forming linear more 

 or less merged striae of black granular-agglutinated spores ; spore-balls black, opaque, 

 more or less irregular, oblong to spherical, of many firmly agglutinated spores, 50-175// 

 in length ; spores dark-brown, chiefly subspherical or occasionally somewhat flattened, sur- 

 rounded by a very prominently swollen and less deeply tinted sac-like envelope (of vari- 

 able width and more or less sharply marked off from an inner dark thin layer), smooth, 

 chiefly 9-12 // in diameter exclusive of the envelope. 



On Poaceae : ^ -kt i. i 



Sorghastrum avenaceum {Chrysopogon avenaceus), Nebraska. 



Sorghastrum ?iutans {Chrysopogon nutans'), Alabama, Texas. 

 Type locality: Auburn, Alabama, on Chrysopogon nutans {Sorghastrmn nutans). 

 Distribution: Alabama and Texas. 

 BxsicCATi : Earth. Ellis & Ev. Fungi Columb. 1686, 2179. 



2. Tolyposporella Brunkii (Ellis & Gall.) Clinton, Jour. Myc. 8 : 147. 1902. 



UsHlago iSorospoHum?) Brunkii Ellis & Gall. Jour. Myc. 6 : 31-14 My 1890 

 Uslilago apiculata Ellis & Gall.; Jennings, Tex. Agr. Exp. Sta. Bull. 9 : 29. My 1890. 



Sori on inner surface of leaf -sheaths though often showing through, forming short 

 linear striae usually so thickly placed as to become merged into a coating of black granular 

 spores ; spores of different stages of development (the younger smaller and light-olive, the 

 older often opaque and olive-black), more or less agglutinated but not in definite spore-balls, 

 chiefly subspherical or spherical, obscurely granular with rather uniformly thickened epi- 

 spore (2-Afi) which often shows faint concentric layers (innermost often marked off as an 

 apparent endospore), chiefly 10-19 /^ in diameter. 



