210 BROOKLYN BOTANIC GARDEN MEMOIRS 
Salix cordata Muhl.—Sumpter, Baker Co., Aug. 1915, J. R. Weir, 
TO: 
Salix Piperi Bebb.—Philomath, Oct. 29, 1911, 3346; The Dalles, 
Wasco Co., Aug. 26, 1915, E. Bartholomew (Barth. Fungi Columb. 
4730). 
Salix pseudocordata Anders.—Hilgard, Union Co., July 10, 1914, 
1530. 
Salix scoulerrana Barr.—Corvallis, Sept. 19, 1910, 17165; St. 
Johns, Multnomah Co., June 23, 1915, W. E. Lawrence, 3347; Austin, 
Grant Co:, Aug. 1915, J. R. Weir, 765; Portland, Aug. 24, tors Be 
Bartholomew (Barth., N. Am. Ured. 1417). 
Salix sp.—Calamity, Aug. 1901, Griffiths & Morris (Griffiths, W. 
Amer. Fungi 347); Crater Lake, Klamath Co., Sept. 22, 1913, E. P- 
Mieinecke, Cr Pk D (2) 13; Hood River Co., May 14, 1914 a5@0; 
Aug. 5, 1914, 1483, 1484; Beaverton, Washington Co., July 15, 1914, 
F. D. Bailey, 1507; Austin, Grant Co., Aug. 25, 1915, J. R. Weir, 262. 
The above specimens are tentatively assigned to this species. 
There are quite certainly not less than four species of Melampsora on 
Salix in North America. The characteristics by which they may be 
separated in the uredinial stages are not well worked out at the present 
time. The larger spored forms have been included here under M. 
Bigelow. 
Arthur (Jour. Myc. 11: 60. 1905) first established the fact that 
this rust has its aecia on Larix. He succeeded in infecting Larix 
decidua in two trials, by inoculating with basidiospores from germi- 
nating telia on Salix amygdaloides collected in Wisconsin. This 
result was later confirmed (Jour. Myc. 13: 194. 1907) with telial 
material collected in Indiana. 
Weir and Hubert (Phytopath. 6: 372. 1916) have succeeded in 
obtaining infection of this species from Salix bebbiana Sarg. collected 
in Montana on Larix occidentalis, and from SS. cordata mackenzieana 
collected in Idaho on Larix europea. The same authors (Phytopath. 
7: 109. 1917) have recently repeated the work with the last-named 
species of Salix and obtained infection with development of pycnia 
and aecia on both L. occidentalis and L. europea. 
16. Melampsora confluens (Pers.) comb. nov. 
Uredo confluens Pers. Obs. Myc. 1: 98. 1796. 
ON GROSSULARIACEAE: I. 
Ribes lacustre (Pers.) Poir.—Philomath, May 3, 1913, F. D. 
Bailey, 1107. 
ONS SALICACEAR: 1 TIT. 
Salix argophylla Nutt.—Freewater, Umatilla Co., June 17, 1913, 
F. D. Bailey, 1764, Aug. 12, 1915, F. D. Bailey, 3324. 
