Ustilago syntherismae (Schwein.) Peck 1875

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 individual spikelets and then shorter, protected by leaf-sheaths, provided with false membrane that ruptures from apex down disclosing black-brown spore-mass and shredded filaments 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, variable in shape and size, irregularly oblong to subspherical, 40-100 (Jin length ; spores very minutely verruculose, inner often appearing smooth, subspherical or somewhat polyhedral to occasionally more elongate, chiefly 9-13 fJin 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.