A LIST OF FUNGI (USTILAGINALES AND URE- 

 DINALES) PREPARED FOR EXCHANGE. 



CONTENTS. 



Page. 



Exchange of duplicate specimens 3 



Abbreviations of authors' names 5 



Other abbreviations and symbols 6 



Page. 



Ustilaginales 7 



Uredinales 11 



Additional list 50 



EXCHANGE OF DUPLICATE SPECIMENS. 



Duplicates of myeological specimens in the United States Depart- 

 ment of Agriculture have been distributed by exchange since 1886. 

 Although but one list of such specimens has been published. 1 the 

 Myeological Exchange has been in continuous operation. This ex- 

 change is intended primarily for those plant pathologists and my- 

 cologists to whom such material is valuable from an economic and 

 educational viewpoint. Requests for specimens have always been 

 complied with whenever possible. When species desired for educa- 

 tional purposes were not available, suitable substitutions have been 

 made. Many specimens belonging to other groups than those listed 

 here are at the disposal of those who ask for them. Requests for 

 species which can not be supplied at the time will be filed and the 

 specimens sent when they can be obtained. 



It is greatly to be regretted that all the specimens represented in 

 this list are not in sufficient quantity to permit distribution in uni- 

 form sets, at least to State agricultural experiment stations. These 

 are exchanged, specimen for specimen, regardless of the fungus group 

 concerned, when those submitted are in satisfactory condition. Speci- 

 mens can not be accepted unless they are well preserved, in fair 

 quantity, authentically determined, labeled, and placed in herbarium 

 envelopes. 



Many species common in certain localities are rare in others. 

 Specimens, both rare and common, are solicited. In regard to the 

 exchange of undetermined specimens and of material in bulk re- 

 quiring preparation for herbarium use, arrangements may be made 

 by correspondence. 



The attention of specialists is called to the desirability of having 

 type specimens deposited in the Pathological Collections of the Bu- 



1 Patterson, Flora W. A collection of economic and other fungi prepared for distribu- 

 tion. U. S. Bur. Plant Indus. Bui. 8, 31 p. 1902. 



