JACKSON: UREDINALES OF OREGON FAIS) 
qua Nat. Forest, near Diston, Lane Co., Oct. 27, 1909, Geo. G. Hedg- 
cock; Philomath, Jan. 6, 1914, 3298; Wren, Benton Co., Aug. 3, 
1914, 3296; Ashland, Jackson Co., Sept. I0, 1914, 3297; Mary’s 
Peak, Benton Co., Feb. 7, 1914, G. H. Godfrey, 3307, Aug. 15, 1914, 
3302; N. slope Mt. Hood, 4,000 ft., Aug. 9, 1914, 1616. 
On PotypopiAcEAE: II, III. 
Pteridium aquilinum pubescens Underw.—Corvallis, Sept. 1909, 
1142, July, 1910, roS2, Aug. 1910, 1058, Oct. 6, 1914, 3109; Bonneville, 
Multnomah Co., Aug. II, 1910, 1076; Scappose, Columbia Co., 
iuly 25, 19o1t, 71067; North slope Mt. Hood, Aug. 9; 19014, 7677; 
Ashland, Jackson Co., Sept. 10, 1914, 1993; Portland, Aug. 24, 1915, 
E. Bartholomew (Barth. N. Am. Ured. 1485); Grant’s Pass, Josephine 
Co, Sept: 5, 1916, J. R» Weir, 250. 
This species in all its stages is very common in western Oregon 
and the association of the infected aecial and telial hosts is everywhere 
apparent. 
From field observations made by the writer and others it has 
been assumed that Peridermium pseudo-balsameum was the aecial 
stage of this species. Recently Weir and Hubert (Am. Jour. Bot. 
4: 328-332. 1917) have conducted cultures showing the genetic con- 
nection of this species with aecia on Abies grandis. The authors 
evidently do not consider the aecia identical with P. pseudo-balsameum. 
The description which they give, however, agrees very well with the 
type of that species. 
According to the writer’s present interpretation, there are two 
closely related species of Peridermium on Abies grandis in western 
Oregon. One is to be referred to P. balsameum and is presumably 
genetically connected with Uredinopsis Copelandiu (cf. 31). The 
other is P. pseudo-balsameum and is genetically connected with the 
species under discussion. 
The walls of the aeciospores in P. balsameum are considerably 
thinner than those of P. pseudo-balsameum. In the former they are 
I-1.5 uw while in the latter they are 2—2.5 yw in thickness. 
PUCCINIACEAE 
33. EARLEA SPECIOSA (Fr.) Arth. Résult Sci. Congr. Bot. Vienne 341. 
1906. 
Aregma speciosa Fr. Syst. Myc. 3: 496. 1832. 
Phragmidium speciosum Cooke, Grevillea 3: 171. 1875. 
ON ROSACEAE: 
Rosa gymnocarpa Nutt.?—I, Austin, Grant Co., Aug. 1915, J. R. 
Weir, 188. 
