6 ARTHUR: NEW SPECIES OF UREDINEAE 
On Fimbristylis spadicea Vahl, borders of low swampy ground | 
along the coast eight miles west of Ponce, Porto Rico, December, 4 
1902, A. A. Heller, no. 6279. The spores are very much larger | 
and coarser than those of the Puccinia occurring on Fimbristyhs i ins 
Mexico. No teleutospores were found. 
Aecidium Qnosmodii sp. nov. 7 
O. Spermogonia amphigenous, in very small circular groups, — . 
inconspicuous, punctiform, honey-yellow, entirely immersed, ol 
epidermal, seen in vertical section globose, g0—120 # in diameter ; 
ostiolar filaments 60-80 p» lon Sr res Uae wa 4 
I. Aecidia hypophyllous, is small circular groups, or solitary, — 
small, pustular; peridia delicate, erect or somewhat recurved, 
margin coarsely lacerate, peridial cells much thicker on outer than — 
on inner side ; aecidiospores globoid, 19-23 by 20-29p; wall : 
colorless, medium thick, 2—2.5 p, closely and finely verrucose. 
On Oxosmodium molle Michx. Type collection from Calla- 
way, Nebraska, May 25, 1902, 7, M@. Bates. It has also been re- : 
ported from Kansas (Bartholomew, Kans. Ured. 180) and North q 
Dakota (Bolley, Agric. Sci. 5: 263), both on O. Carolinianum DC. 
Aecidium Mertensiae sp. nov. 
O. Spermogonia epiphyllous, in small circular groups, crowde: 
punctiform, wholly immersed, subepidermal, seen in vertical sec- 
tion, globose, 65-120 in diameter; ostiolar filaments 60—-go 
long. me 
T Aecidia hypophyllous, in circular groups, crowded, broa 
and low; peridia spreading, recurved, coarsely lacerate ; aecidio- 
spores globoid, 19-26 by 22-284; wall colorless, very be , 
I-2 4, minutely and closely verrucose, appearing smooth ; 
tents deep orange-yellow, 
On Mertensia paniculata (Ait.) Don, near Lolo Creek, in the 
Bitter Root Mountains, Idaho, August 10, 1902, C. V. Piper. On 
M. Sibirica (L.) Don, Jefferson Lake, Marion County, Oregon, 
August, 1892, Moses Craig. The former to be taken as the type. 
Aecidium malvicola sp. nov. 
O. Spermogonia epiphyllous, in groups, punctiform, honey- 
yellow, immersed, subepidermal, in vertical section globose, 100 
125 : in diameter ; ostiolar filaments very numerous, 35—80 4 lon: 
I. Aecidia hypophyllous, in diffuse circular groups often | 
mm. in diameter ; peridia short, cylindrical, margin erect or s 
what revolute, erose ; aecidiospores globoid, 14-22 by 16-, 
wall colorless, thin, r. 5 4, minutely and evenly Verraeaee 
