176 



complementing published descriptions, whether such descriptions 

 be brief and imperfect, or whether they be very detailed. 



The subject of making leaf impressions or prints is not new, 

 nor does the method described here originate with me, yet I have 

 never seen this particular method described in print. Its utility 

 is so great, and the possibility of its application to other purposes, 

 illustration, for instance, is so evident, that the publication of a 

 short description of the method seems to be warranted. Per- 

 haps the very simplicity of the method explains why it has not 

 previously attracted attention among systematic botanists. 



Fi£ 



Ulmus cam pes tr is L. 



The method described by Berry* can be utilized only when 

 leaves can be sacrificed, as his method involves the removal of a 

 leaf from the specimen and the smearing of both surfaces with 

 ink. Manifestly this method should never be used in making 

 prints of the leaves of type specimens, or of other valuable 

 botanical material. 



* A method of making leaf prints. Torreya 2: 62-64, 1911. 



