210 BROOKLYN BOTANIC GARDEN MEMOIRS 



Salix cordata Muhl. — Sumpter, Baker Co., Aug. 1915, J. R. Weir, 

 167. 



Salix Piperi Bebb. — Philomath, Oct. 29, 191 1, 3346; The Dalles, 

 Wasco Co., Aug. 26, 1915, E. Bartholomew (Barth. Fungi Columb. 



4736). 



Salix pseudocordata Anders. — Hilgard, Union Co., July 10, 1914, 



1536. 



Salix scouleriana Barr. — ^Corvallis, Sept. 19, 1910, 116^; St. 

 Johns, Multnomah Co., June 23, 1915, W. E. Lawrence, 3347; Austin, 

 Grant Co., Aug. 1915, J. R. Weir, i6j; Portland, Aug. 24, 1915, E. 

 Bartholomew (Barth., N. Am. Ured. 1417). 



Salix sp. — Calamity, Aug. 1901, Griffiths & Morris (Griffiths, W. 

 Amer. Fungi J47); Crater Lake, Klamath Co., Sept. 22, 1913, E. P. 

 Meinecke, Cr Pk D (2) 13; Hood River Co., May 14, 1914, i5og, 

 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. 

 Bigelowii. 



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 W^isconsin. 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 5. cordata niackenzieana 

 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. enropea. 



16. Melampsora confluens (Pers.) comb. nov. 



Uredo confluens Pers. Obs. Myc. i: 98. 1796. 

 On Grossulariaceae : I. 



Ribes lacustre (Pers.) Poir.— Philomath, May 3, 1913, F. D. 

 Bailey, 1107. 

 On Salicaceae: II, HI. 



Salix argophylla Nutt. — Freewater, Umatilla Co., June 17, 1913, 

 F. D. Bailey, 1164, Aug. 12, 1915, F. D. Bailey, 3344. 



