NORTH AMERICAN PARASITIC EXOASCE.E. 1 1 :> 



Newton, Springlield, and Weymouth. Mass., and Mr. F. L. 

 Stevens has kindly contributed material collected by himself 

 in Wisconsin, which he believes to be P. i>ra>ididcidata. 



The ovaries of Popnliis frcmontii are reported as affected 

 by the same disease as some of the above material, but I have 

 had no opportunit}- for its studv upon that host. 



Tapiirina carnea yo/miiso)i. 

 Bibl. and S\'n. : 



Johaiison "b^. Rostrup '88. 



87. '• '91. 



Sadebeck '93. 



This species, reported in Greenland upon leaves of Bettda 

 nana, is described as forming blisters conspicuous both for 

 their size and reddish color. The asci, borne only on the 

 upper side of the leaves, have rounded or truncated apices, 

 and are in diameter 14-30", in length 44-80//; they are filled 

 with conidia; stalk-cells are not formed. I have had no 

 opportunit}' to study the species except by its bibliograph}-. 



Taphrina ccerulescens [Mont. t£- Dcsiii.) Talasnc. Plate 

 in. Fig. 2. 



Bibl. and Syn.: 



Asconiyccs ccvriilcsctvis Mont. & Desm. 



Trelease '84. 

 Ellis '85. 



Taphrijia Civrulcscens Tul. 



Robinson '87. Sadebeck "90. 



Ellis "89. Seymour & Earle '92. 



Sadebeck "93. 



Asconiyccs qncrciis Cke. 



Cooke '78. Ilarkness "85. 



Ravenel '78. Ellis & Everhart '87. 



Thiimen '81. Langlois '87. 

 Cooke '83. 



Taphrina qncrciis Sacc. 



Saccardo '89. 



