GYMNOSPORANGIUM WITH REPEATING SPORES 
43 
from Professor H. S. Jackson of the Oregon Agricultural College, 
having been made by H. P. Barss and G. B. Posey August 15, 1914, 
on the north slope of Mount Jefferson, along the trail to Hanging 
Valley, at an altitude of 5,000 feet. The green sprays of Chamaecy- 
paris nootkatensis were abundantly dotted beneath with the conspicu- 
ous, golden-yellow sori of the rust. Upon microscopic examination 
the sori were found to contain many teliospores, some of which were 
in process of germination at time of gathering (fig. i), although six 
weeks later, when they had reached me, both urediniospores and 
teliospores had lost their viability. The teliospores in a sorus prob- 
ably did not exceed one teliospore to a hundred urediniospores, the 
condition apparently being that of the early stage in the transformation 
of a uredinial into a telial sorus. 
It still seems probable that true telial sori will eventually be found. 
There would, however, evidently be no difficulty in producing the 
aecial stage from such teliospores as those found in the present in- 
stance; and cultures could confidently be attempted with similar 
material, should circumstances favor. 
It is now some five years since Dr. Kern^ suggested "the possi- 
bility of a relationship between the cedar-rust, JJredo nootkatensis, and 
Aecidium Sorbi.'' This prediction was supported by "inferences 
drawn from analogy, homology and geographic distribution," as he 
explained in his monograph (p. 408) of the following year. Without 
taking time to review the grounds of the argument, it may be said 
that time has added items of strength, without detecting flaws. The 
argument from geographic distribution has the present basis. The 
following list embraces all collections now known to the writer: 
Alaska, Baranof Island: I on Mains rivularis, Aug. 2, 1914, /. P. Anderson, on 
Sorbus scopulina, Aug. 30, 1897, C. S. Sargent, on S. sitchensis, Aug. 2, 1914, /. P. 
Anderson, II on Chamaecyparis nootkatensis, June 15, 1899, Wm. Trelease. 
British Columbia, Vancouver Island: I on Sorbus occidentalis , Aug. 8, 1905, 
F. K. Butters, on M. rivularis, Aug. 4, 1907, F. K. Butters. 
Washington, Mount Rainier (Tacoma): I on 6". occidentalis, Aug. 24, 1901, 
E. W, D. Holway, Hon C. nootkatensis, August;i9i3, C. von Tubeuf; — Goat Mountains 
(near Mt. Rainier): I on S. occidentalis, Sept. 11, 1895, /. A. Allen; — Olympic Moun- 
tains: I on 5. occidentalis, June, 1900, A. D. E. Elmer, Aug. 15, 1907, T. C. Frye. 
Oregon, Mount Jefferson: II and III on C. nootkatensis, Aug. 15, 19 14, H. P. 
Barss and G. B. Posey. 
8 Kern, Prediction of relationships among some parasitic fungi. Science 31: 
833. May, 1910. 
