Parasitic Fungi of [linois. 169 
On leaves of Scirpus fluviatilis: ‘Champaign, Aug. 13, 
1031, IL., UI.; Piatt, Aug. 16, 1088; LaSalle, Sept. 16, 1551, 
Sept. 20, 1597; Ogle, Sept. 22, 6114, IT., ITT. 
The leaves are thickly mottled with conspicuous brown 
spots, not definitely circumscribed. The appearance is nearest 
to that of Uromyces spartine, Farlow (U. junci, var. spartine, 
Hillis Exs. No. 239), of anything found, but it is sufficiently 
distinct in the characteristics of the sori, and in the larger, 
differently shaped spores. 
U. acuminatus, Arthur. 
II., II. Hypogenous, sori scattered, elongated, soon 
naked, ruptured epidermis ragged, conspicuous. Uredospores 
globose or oval, somewhat echinulate. Teleutospores very 
irregular, subglobose to clavate, sometimes rounded or trun- 
cate, but usually conspicuously and variously pointed; epispore 
thin, smooth, yellowish brown, 15-18 by 24-39 u; pedicel 
rather slender, somewhat colored, from one to three times 
length of spores. 
I. Unknown. II., III. Sori linear, narrow, elongated, on the un- 
der surface of the leaves plane or slightly convex, sunken, soon naked; 
encircling epidermis somewhat conspicuous. II. Uredosori yellowish, 
inconspicuous; uredospores large, round or elliptical, finely and plenti- 
fully echinulate, brcwnish yellow, .00088 to .0012 in. broad by .00102 to 
.0014 in. long. III. Teleutosori brownish black; teleutospores oblong- 
club-shape and oblong lanceolate to obovate, smooth, golden brown, 
darker at the apex, .0006 to .00088 in. broad by .0010 to .00163 in. long ; 
wallthin; apex much thickened, .90032 to .00048 in. thick, more or less 
obliquely acuminate, or rarely only apiculate, sometimes with two 
pointed terminations, one longer than the other, very rarely obtuse or 
rounded; base narrowed or only acute; pedicel of uniform thickness, 
as long as the spore, or shorter, very rarely longer, colored.—Arthur, 
Bull. Minn. Acad. Nat. Sci. Vol. XI. p. 35. 
On leaves of Spartina cynosuroides: McHenry, Aug. 26, 
1326, I., IL; LaSalle, Sept. 16, 1559. 
Among the Uromycetes inhabiting grasses this is readily 
distinguished by the irregular and peculiar shape of the teleu 
tospores. While some are no longer than wide, many are ob- 
long or nearly lanceolate, while the apex has a multitude of 
forms: sometimes straight, sometimes acutely acuminate; often 
