116 ARTHUR: NEW SPECIES OF UREDINEAE 
it wasafterward placed under Uredo paspalicola P. Henn. (see Myco- 
logiag: 92. 1917). The other two collections, those by Whetzel 
& Olive on Ichnanthus, were placed under Puccinia substriata 
Ellis & Barth. (see Mycologia 9: 73. 1917),a species now consid- 
ered to include Uredo paspalicola. More intimate and extended 
- comparisons, however, have led to the belief that this form should 
be separated from the widely distributed and variable P. substriata. 
The most characteristic features are the large and usually pale 
urediniospores, with their thin walls, sparsely covered with spine- 
like points. The spores were at first thought to be thick-walled 
(see Mycologia 8: 22. 1916),an error due, as in many other cases, 
to mistaking the dense ectoplasm of the cell as part of the wall. 
Puccinia Coelopleuri sp. nov. 
O. Pycnia amphigenous or petiolicolous, crowded in groups 
I-2 mm. in diameter, noticeable, subepidermal, globoid, 96—112 u 
in diameter; ostiolar filaments short. 
II. Uredinia amphigenous; the primary form sometimes peti- 
olicolous, crowded, circinating about the pycnia in round or oblong 
groups 2-10 mm. long, oblong, 0.5-4 mm. long, early naked, 
pulverulent, cinnamon-brown, ruptured epidermis conspicuous, the 
secondary form scattered over the surface of the leaves unaccom- » 
panied by pycnia, oval, 0.2-0.5 mm. long, otherwise like the pri- 
mary form; urediniospores broadly obovoid or ellipsoid, 22-26 by 
27-35 u; wall cinnamon-brown, 2~-2.5 u thick, much thicker above, 
3-7 u, moderately echinulate, the pores 3, equatorial, covered by 
the colorless swollen cuticle. 
III. Telia mostly hypophyllous, scattered, oval, 0.2-0.5 mm. 
long, early naked, somewhat pulverulent, chocolate-brown, rup- 
tured epidermis evident; teliospores cylindric, oblong or oblong- 
clavate, 15-20 by 37-63 », rounded at both ends, or slightly nar- 
rowed below, not or slightly constricted at septum; wall dark 
cinnamon-brown, thin, 1-2y, slightly thickened at apex, 3-4n, 
smooth; pedicel colorless, fragile, short. 
On Coelopleurum Gmelini (DC.) Ledeb., Juneau, June 20, 1917, 
No. 355, July 18, 1918, No. 481; Mendenhall, June 24, 1917, No. 
366, September 9, 1917, No. 387 (type), August 3, 1918, No. 487; 
Haines, August 21, 1918, No. soz, all from Alaska, and collected 
by J. P. Anderson. A conspicuous and, on account of its large ~ 
spores, a striking species. 
