38 NORTH AMERICAN FI.ORA [V01.UMK 7 



Illustrations : Trans. Acad. Sci. St. I,ouis 7 : pi. 25, f. 19-23 ; Bull. Iowa Aer. Exp. Sta. 54 : 

 /. 114 {19) . 



ExsrcCATi : li^llis & Ev. Fungi Columb. 1600; Griff. West Am. Fungi 214, 214<^. 



2. Sorosporium Eriochloae Griff. Bull. Torrey Club 31 : 84. 1904. 



Sori in ovaries, oblong, about 2-3 mm. in length, more or less concealed by the envel- 

 oping glumes, with a conspicuous whitish false membrane that ruptures in lobes from the 

 apex disclosing a blackish somewhat agglutinated spore-mass and a small columella ; sterile 

 cells of false membrane adhering together rather firmly, chiefly cubical to 2-3 times as long 

 as broad, occasionally more rounded ; spore-balls rather irregular but chiefly ovoid to sub- 

 spherical, soon separating into spores, usually 60-100^ in length ; spores somewhat agglu- 

 tinated, dark reddish-brown, ovoid to subspherical or occasionally polyhedral, smooth or 

 minutely verruculose, 11-16 fi in length. 



On Poaceae : 



Monachne punctata {Eriochloa punctata) , Arizona. 

 Type locality : Bmpire Ranch, Santa Rita Mountains, Arizona, on Eriochloa punctata 

 {Monachne punctata) . 



Distribution : Known only from the type locality. 

 Illustration : Bull. Torrey Club 31 : 85,/. 13-16. 



3. Sorosporium Everhartii Ellis & Gall. Jour. Myc. 6 : 32. 1890. 



Tolyposporium Everhartii Dietel, in E. & P. Nat. Pfl. 1^** : 14. 1897. 



Sori in ovaries of the spikelets, linear, about 1-2 cm. in length, with prominent false 

 membrane dehiscing from apex into several lobes, with black-brown agglutinated spore- 

 mass that wears away from apex disclosing the flattened columella of plant tissue ; spore- 

 balls oblong to subspherical, composed of many rather firmly agglutinated spores, usually 

 55-125 ," in length ; spores reddish- brown, inner often nearly hyaline, polyhedral or some- 

 times ovoid to subspherical, smooth or outermost spores granular- verruculose, chiefly 8-12/^ 

 in length. 



On Poaceae : 



Andropogon glomeratus {A. macrourus), Florida. 



Andropogon virginicus, Alabama, Georgia, Mississippi, New Jersey. 



Schizachyrium scoparium {Andropogon scoparius), Alabama, Connecticut. 

 Type locality: Newfield, New Jersey, on Andropogon virginicus. 

 Distribution : Connecticut to Florida and Mississippi. 



ExSiCCATi : Ellis & Ev. N. Am. Fungi 2265 {b)\ Sydow, Ust. 190 ; Ellis & Ev. Fungi Columb. 

 473 ; Seym. & Earle, Econ. Fungi 74, C 115; Rav. Fung. Car. II. 98. 



4. Sorosporium contortum Griff. Bull. Torrey Club 31 : 83. 1904. 



Sori in the inflorescence, forming linear bodies often 3-5 cm. in length, with basal part 

 concealed by leaves but apical end exposed, rupturing upon maturity and scattering the 

 black granular spore-mass and leaving behind the prominent shredded false membrane and 

 the filaments of plant tissue ; spore-balls opaque, ovoid to subspherical or occasionally mor^ 

 irregular, firm, composed of many spores, chiefly 50-90 /^ in length ; sterile membrane 

 composed of hyaline thick-walled cells^ rather firmly bound together and cubical or 2-3 

 times as long as broad ; spores reddish-brown, interior ones often scarcely colored, ovoid 

 to subspherical or polyhedral, smooth or outer ones becoming obscurely verruculose, 9-13 fJ- 

 in length. 



On Poaceae : 



Heteropogon contortus {Andropogon contortus), Arizona; Mexico. 

 Type locality: Santa Rita Mountains, Arizona, on Andropogon contortus {Heteropogon 

 contortus) . 



Distribution: Arizona and Mexico (Guadalajara). 

 Illustration : Bull. Torrey Club 31 : 85. /. 1-3. 

 Exsiccati : Seym. & Earle, Econ. Fungi C 114. 



5. Sorosporium Syutherismae (Peck) Farl.; Farl. & Seym. Host Index 



N. Am. Fungi 152. 1891. 



Ustilago Syntherismae Peck, Ann. Rep. N. Y. State Mus. 27 : 103. 1875. 



Sorosporium CenchriV. Henn. Hedwigia 35: 221. 1896. (Type from Brazil, on Cenchrus 

 echinatus.) 



Sori involving entire inflorescence, elongate, 3-7 cm. in length, or rarely limited to 



