572 ARTHUR: NEW SPECIES OF UREDINEAE 
truncate above, somewhat narrowed below, slightly constricted 
at the septum; wall chestnut-brown, considerably paler below, 
rather thin, 1.5-2u, much thicker above, 7—9u, smooth; pedicel 
somewhat tinted, firm, usually tapering downward, one half length 
of spore or shorter. 
On Nabalus racemosus (Michx.) Hook., Seven Islands, Sague- 
nay Co., Quebec, August 6, 1907, C. B. Robinson 785. A well- 
marked species, probably a leptoform, although the sori become 
uncovered slowly and the spores germinate tardily. 
Uromyces Glyceriae sp. nov. 
O.and I. Pycnia and aecia unknown. 
II. Uredinia amphigenous, intercostal, scattered, oval or lens- 
shaped, small, 0.2-0.4 mm. long, soon naked, pulverulent, brownish 
yellow, ruptured epidermis usually inconspicuous; urediniospores 
broadly ellipsoid or globoid, 16-21 by 18-26y; wall pale golden 
yellow, moderately thick, 1.5-2.5u, finely and evenly verrucose- 
echinulate; pores 6-8, scattered, rather distinct. 
Ill. Telia amphigenous, intercostal, scattered, oval or lens- 
shaped, small, 0.2-0.4 mm. long, tardily naked, finally pulvinate, 
dark chestnut-brown, longitudinally ruptured epidermis usually 
conspicuous; teliospores irregularly obovoid or oblong-obovate, 
14-19 by 21-34u, rounded, truncate or obtuse above, usually 
narrowed below; wall smooth, cinnamon-brown, often paler be- 
low, rather thin, I-1.54, apex much thicker, 3-74; pedicel slender, 
tinted, about length of spore. 
On Glyceria septentrionalis Hitche. (usually listed as G. fluitans), 
Racine, Wis., Oct. 19, 1890, J. J. Davis; Racine, Wis., April, 
1891, J. J. Davis (type) (Ellis & Everh., N. Amer. Fungi 2778); 
Western Union Junction, Wis., Oct. 24, 1897, J. J. Davis; Oregon, 
Ill., Sept. 11, 1889, M. B. Waite; G. acutiflora Torr., Newport, 
R. L., July, 1878, W. G. Farlow. This species is very similar in 
both gross and minute characters to Uromyces Poae Rabenh., for 
which it has been mistaken, but differs especially in having twice 
as many pores in the urediniospores. The true Uromyces Poae 
has been collected but once in America, so far as the writer knows, 
which was in Nova Scotia by Professor W. P. Fraser, on Poa 
trivialis. 
I am indebted to Dr. Davis for fine fruiting specimens of the 
host, collected Oct. 1, 1910, from the type station near Racine, 
with which the identity of the host has been re-established. Dr. 
