V 
/ 
Mr. Oakes Ames*2. 
to the usefulness of the work. It will he possible, also, to 
use half-tone illustrations to some extent. 
With regard to Pogonia affinis , our material of this 
species is certainly not very extensive. It consists of a 
photograph of a plant which is said to have been collected at 
Westtown, Pennsylvania, June 1, 1887, by Edith Cheyney. 
Sincerely yours 
Paul C. Standley 
Assistant Curator, 
Division of Plants. 
