11 



Uncinula Salicis (DC.) Wint. 



On Populus balsamifera, Balsam Poplar. Burl., Aug. 1890; J. 915 



On Populus treniuloides, American Aspen. Newfane, Aug. 1892; 

 G. 917. 



On Salix alba var. vitellina, Yellow Willow. Charlotte, Aug. 1897; 

 O. 918. 



On Salix cordata, Willow. Burl., Oct. 1897; O. 919. 



On Salix discolor. Burl., Oct. 1897; O. 920. 



On Salix humilis. Burl., July, 1897; Flynn, 921. 



On Salix myrtilloides. Charlotte, Sept. 1897; O. 922. 



On Salix sp. Wardsboro, Sept. 1892; G. 923. Newfane, Sept. 

 1892; G. 596. 



USTILAGINEAE. 

 DoASSANSiA OCCULTA var. Farwellii Setchell. 



On fruits of Potamogeton Pennsylvanicus. Townshend. In Herb. 

 A. J. Grout. 



Sphacelotheca hydropiperis (Schum.) DeBy. 



In ovaries of Polygonum sagittatum. Burl., Oct. 1892; J. 1120. 

 Johnson, Sept. 1893; G. 715. Newfane, Sept. 1892; G. 67. Water- 

 bury, Aug. 1898; J. and O. 1882. 



Tilletia striaeformis Westd. 



On leaves of Calamagrostis Canadensis, Blue-joint. Newfane, 

 July, 1894; G. 58. 



Urocystis Agropyri (Preuss.) Schroet. 



On leaves of Agropyron repens. Witch-grass. Burl., June, 1891 ; 

 J. 1214. 



USTILAGO anomala J. Kunze. 



In ovaries of Polygonum dumetorum var. scandens. Beaver, 

 Sept. 1897; O. 1121. 



UsTiLAGO AvENiE (Pers.) Jensen. 



In ovaries of Avena sativa. Oat. Present to a greater or less de- 

 gree in all oat fields. Often quite destructive, especially where west- 

 ern seed is used. Burl., July, 1894; J. 1122. 



UsTiLAGO Caricis (Pers.) Fuckel. 



In ovaries of Carex sp., Sedge. Johnson, July, 1893 ; G. 66. 

 In ovaries of Carex monile. Burl., July, 1898; H. 1753. 

 In ovaries of Carex siccata. Burl., July, 1898; H. 1754. 

 In ovaries of Carex sterilis. Stratton, July, 1895; J. 1124. 

 In ovaries of Rhyncospora alba. Newfane, Sept. 1892; G. 68. 



