CLINTON: NORTH AMERICAN USTILAGINEAE. 
467 
Hosts: Physalis angulata , Miss.; P. heterophylla , la.; P. lance- 
olata , la., Ill., Ivans.. Ohio, S. Dak. ; P. lanceolata var. laevigata , 
Ivans.; P. Philadelphia , la., Inch; J P. pubescens , Conn, (on cult, 
strawberry tomato), Ill., Ind., Kans., Tex., Wise.; P. Virginiana , 
Conn., Ia., Ill., Mass., Mich., N. J., N. Y., Wise., Can.; Physalis 
sp., Conn., Ia. (type E. Besseyi ), Ivans., Ivy., Minn., Neb., N. Y., 
Tex., Wise., Porto Rico; Solarium nigrum , Ia., Ivans.; S. triflorum , 
N. Dak. 
This is perhaps the most common species of Entyloma. It some¬ 
times does considerable injury to the cultivated strawberry tomato. 
Literature: 54. 
Entyloma serotinum Schrot. 
Entyloma serotinum Schrot., Cohn’s Beitr. Biol. Pflanz., 2 : 437. 1877. 
Entyloma leuto-maculans Hume, Proc. Ia. Acad. Sci., 9 : 238. 1902. 
Sori in leaves, subcircular, about 2-5 mm. in diameter, thin, light 
colored, sometimes with slightly darker border, usually showing on 
both surfaces though more plainly below; spores hyaline to light 
reddish yellow, ovoid to chiefly subspherical or spherical, occasion¬ 
ally slightly angled, with medium thick wall, smooth, 11-15 /x. in 
length ; conidia not observed. 1 
Host: Mertensia Virginia, Ia. (type E. leuto-maculans ), Md. 
The American specimens on Mertensia agree fairly well with the 
European form of this species on Symphytum. If Entylo7na canes- 
cens on Myosotis is distinct from this species, it is possible that the 
form described here might come under it. Schroter described both 
species, the chief difference between them, apparently, being that 
Entyloma canescens is usually found in the spring and its spores 
germinate in the leaves producing sporidia, while Entyloma seroti¬ 
num is more likely to be found in the fall and the mycelium gives 
rise to conidia similar to the sporidia of the other species. The 
spores of the two are alike. Hume thinks that the American speci¬ 
mens are distinct from either of the European species and he has 
given it the name Entyloma leuto-maculans but with no special 
specific description accompanying it. Literature : 39, 87. 
1 Described, however, by European botanists as hyaline, filiform, 26-50 p. X 
2-3 ji. 
