CONTENTS 
PAGE 
Illustrations of Fungi — ^XXII - William A. Murrill 221 
Uredinales of Porto Rico Based on Collections by F. L. 
Stevens - - - - - J. C. Arthur 227 
The Genus Clitocybe in North America 
William A. Murrill 256 
Penicillium avellaneum, a New Ascus-producing Species 
Charles Thom and G. W. Turesson 284 
News and Notes -------- 288 
Index to American Mycological Literature - - - 293 
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