JACKSON: UREDINALES OF OREGON 225 
Posey, 1394; Whitewater Ranger station, Aug. 28, 1916, H. P. Barss; 
Foot of Mt. Jefferson, Aug. 28, 1916, H. P. Barss. 
The material collected by Barss and Posey in 1914 contained 
teliospores in the uredinia and forms the basis of the transfer of the 
very interesting and much discussed Uredo nootkatensis to Gymno- 
sporangium. A full account of the history of this species has been 
given by Arthur (I. c.). In the collections of 1916 made in the same 
locality by Prof. Barss, teliospores were found in great abundance 
with the uredinia, and in many sori predominated. The uredinio- 
spores were germinated in this laboratory and the germ tubes found to 
develop in the usual way for urediniospores. 
43. GYMNOSPORANGIUM SorBI (Arth.) Kern, Bull. N. Y. Bot. Gard. 7: 
A338; \1GED: 
Aecidium Sorbi Arth. Bull. Torrey Club 33: 521. 1906. 
On MALACcEAE: I. 
Sorbus occidentalis (S. Wats.) Greene—Whitewater Ranger station, 
Mt. Jefferson, Aug. 28, 1916, H. P. Barss. 
There is little doubt that the suggestion of the genetic relationship 
of this species with Gymnosporangium nootkatensis (cf. 42) originally 
made by Kern (Science 31: 833. 1910) and later re-affirmed by 
Arthur (Am. Jour. Bot. 3: 43-44. 1916) will prove to be correct. 
The above collection extends the range of the aecia to correspond 
exactly with the range of the known collections of uredinia and is the 
most southern record. 
It seems best, however, for the purpose of this list to retain the 
above name till actual cultures confirming the prediction have been 
made. 
44. GYMNOSPORANGIUM TUBULATUM Kern, Bull. N. Y. Bot. Gard. 7: 
SE clOLT. 
Roestelia tubulata Kern; in M. E. Jones, Bull. Univ. Mont. 61: 64. 
1910. 
On MALAcgEAE: I. 
Crataegus Douglasii Lindl.—Minam River, Wallowa Co., Oct. 5, 
1897, E. P. Sheldon, 9061; Wallowa Nat. Forest, Sept. 28, 1910, 
G. G. Hedgcock, 1944. 
The above collections were found in the Arthur herbarium at the 
Purdue University Experiment Station. The specimens show chiefly 
foliage infection, though the first-mentioned collection also includes 
infected fruit. 
Weir (Phytopath. 5: 218. 1915) has recently demonstrated by 
cultures that the telia, which were previously unknown, occur on the 
twigs of Juniperus scopulorum forming irregularly lobed galls. Telia 
