Part 1, 1906] USTILAGINACEAB 39 



individual spikelets and then shorter, protected by leaf-sheaths, provided with false mem- 

 brane that ruptures from apex down disclosing black-brown spore-mass and shredded fila- 

 ments of plant tissue ; sterile cells of membrane hyaline, oblong to cubical or subspherical , 

 with , tendency to adhere in filaments when separated ; spore-balls rather evanescent, vari- 

 able in shape and size, irregularly oblong to subspherical, 40-100 (J- in length ; spores very 

 minutely verruculose, inner often appearing smooth, subspherical or somewhat polyhedral 

 to occasionally more elongate, chiefly 9-13 fJ- in length. 



On Poaceae : 



Cenchrus echinatus, Mexico (Guadalajara). 



Cenchrus multiflorus, Mexico. 



Cenchrus tribuloides^ Colorado, Connecticut, Illinois, Indiana, Iowa, Kansas, Michigan, 



Minnesota, Nebraska, New York, South Dakota, Texas, Wisconsin. 

 Cenchrus sp., Kansas, Texas ; Mexico. 

 Panicum agrostoides, Missouri. 



Panicum capillare, Indiana, Iowa, Kansas, Massachusetts, Nebraska, South Dakota. 

 Panicum hirticaulum^ Arizona. 

 Panicum proliferum., Delaware, District of Columbia, Illinois, Iowa, Kansas, Missouri, 



Nebraska, North Carolina, Ohio. 

 Panicum sp., Kansas, Missouri. 

 Type locality : New York, on Cenchrus iribuloides. 



Distribution : New England to North Carolina, South Dakota, and Mexico ; also in South 

 America. 



Illustrations: Trans. Acad. Sci. St. I.ouis 7 : pi. 26, f. 1, 2, 6-13, pi. 27, f. 1-3, 9-12; Bull. 

 Conn. Geol. Nat. Hist. Surv. 5 : /. 7, 36; Bull. Iowa Agr. Kxp. Sta. 54 : /. 114 (J, 5, 6). 



ExsiccATi : Seym. & Earle, Econ. Fungi 66, 398, C 39, C 40, C 116, C 117 ; Ellis & Ev. Fungi 

 Columb. 646, 748, 1785, 1786; Sydow, Ust. 163, 348; Ellis & Ev. N. Am. Fungi 1890a, 2260a, 2260b; 

 Griff. West Am. Fungi ^6* ; Kellerm. Ohio Fungi 41. 



6. Sorosporium EUisii Wint. Hedwigia 22 : 2. Ja 1883. —Bull. Torrey 



Club 10: 7. Ja 1883. 



Sori elongate, including the entire inflorescence or more rarely confined to the indi- 

 vidual spikelets, chiefly 1-5 cm. in length, often hidden by enveloping leaf-sheaths, pro- 

 vided with evident false membrane, within which is the black-brown dusty spore-mass ; 

 spore-balls dark reddish -brown, subopaque, rather temporary, oblong to subspherical, 

 chiefly 40-100 ^ in length ; spores somewhat irregular, oblong to chiefly subspherical or 

 polyhedral, thick-walled (wall often irregularly thickened and lighter-colored where spores 

 have been in contact), verruculose, chiefly 12-19 /i in length. 



On Poaceae : 



Andropogon virginicus, New Jersey. 



Arts llda dicho^ma, Ohio, Tennsylvainia. _ . 



Schizachyrium scoparium {Andropogon scoparius), Connecticut, Illinois, Kansas. 

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

 Distribution : Connecticut and New Jersey to Kansas. ^^ . . o 



Illustration : Trans. Acad. Sci. St. I.ouis 7 -pi. 26, f. 3 pL 29, f. 6-8. _ 



Exsiccati: Seym. & Earle, Econ. Fungi C 38 ; Elhs & Ev. N. Am. Fungi 7^9P, 1494. 



7. Sorosporium provinciale (Ellis & Gall.) Clinton, Jour. Myc. 8 : 



145. 1902. 



Sorosporium EUisii provincialis Ellis & Gall. Jour. Myc. 6 : 31. 1890. 



Sori in the inflorescence, linear, often 6 cm. or more in length, concealed within the 

 leaf -sheath or upper part protruding, with false membrane that becomes lacerated exposing 

 the black-brown granular spore-mass; spore-balls variable, apparently gradually wearing 

 away chiefly 50-100^ or possibly even longer; spores medium-light reddish-brown though 

 often' darker in places, rather regular, ovoid to chiefly subspherical, minutely verruculose, 

 with thick uniform cell-wall (3;/), 14-19 \i in length. 



On Poaceae : • t^t i. i 



Distribution : Missouri and Nebraska. 



Illustration : Bull. Iowa Agr. Exp. Sta. 54: /. 120 {,U). 



Exsiccati : Ellis & Ev. N. Am. Fungi 2425. 



8 Sorosporium granulosum Ellis & Tracy, Jour. Myc. 6: 77. 1890. 



Sori taking the place of the aborted inflorescence, linear, usually enclosed in the leaf- 

 sheaths, forming an agglutinated brown-black spore-mass ; spore-balls reddish- to black- 



