CLINTON: NORTH AMERICAN USTILAGINEAE. 
4(53 
rank. The hosts marked by a star have not been seen by the 
writer. It is barely possible that some of these may belong under 
Entyloma poly sporum. Setchell reported the germination of the 
spores. Literature : 54, 162. 
Entyloma polysporum (Pk.) Farl. 
Protomyces polysporus Pk., 1 Tliiim. Myc. Uni., 1813. 1881. 
Entyloma polysporum Farl., Bot. Gaz., 8 : 275. 1883. 
Entyloma Holwayi Syd., Ust., 282, 1901. 
Exsiccati : Entyloma Compositarum Farl., on Ambrosia artemisiaefolia , 
Ell., N. A. Fungi, 1492 b, Seym. & Earle, Econ. Fungi, 292 a-b, Ell. & 
Ev., Fungi Col., 541 ; Entyloma Holwayi Syd. n. sp., on Cosmus sulphu- 
reus, Syd., Ust., 282 ; Entyloma polysporum (Pk.) Farl., on Ambrosia biden- 
tata , Seym. & Earle, Econ. Fungi Clinton Ust. Supp., C 31, on Ambrosia 
trifida , Rourn., Fungi Sel., 4868; Protomyces polysporus Pk. n. sp., on 
Ambrosia trifida , Thiim., Myc. Uni., 1813. 
Sori in leaves, forming subcircular to more irregular and often 
indefinite areas, generally dark brown, 2-5 mm., usually limited in 
number and killing more or less of the surrounding tissue ; spores 
hyaline to yellowish or even light chestnut brown, ovoid to spherical 
or somewhat polyhedral, smooth, usually with remains of gelatinous 
hyphae forming outer coat of the thick wall, 12-17 y or in some 
cases even 20 y in length; evidence of conidia usually lacking. 
Hosts: Ambrosia artemisiaefolia , Conn., Ia., Ill., Ind., Mich., 
N. Y., Wise.; A. bidentata, Ill.; A. trifida, la., Ill., N. Y. (type); 
Cosmus sulphurous, Mex., Chapala (type E. Holwayi ); Gaillardia 
pulcliella , Ivans.; Helianthus annuus , Mont. 
While this species is based on Peck’s specimens issued in Thiimen’s 
Myc. Uni., these represent a form that approaches Entyloma com¬ 
positarum ; and the specimens on Ambrosia bidentata from Illinois 
represent the opposite extreme. Entyloma. Holwayi is included 
here as not specifically distinct. The germination of the spores has 
not been reported. Literature : 54. 
Entyloma arnicalis Ell. & Ev. 
Ramularia arnicalis Ell. & Ev., Proc. Acad. Nat. Sci. Pliila., 1891 : 85. 
1891. 
1 Also described by Peck in Ann. Rep. N. Y. St. Mus. Nat. Hist., 34 : 45, 
but this was not issued until 1883. 
