UNITED STATES DEPARTMENT OF AGRICULTURE, 



BUREAU OF PLANT INDUSTRY. 



TAXONOMIC AND RANGE INVESTIGATIONS. 



Washington, D. C, 



April ZZ, 1913. 



Mr. Walter Deane , 



// 



29 Brewster St« , 



Cambridge , Masse chits etts . 



Dear Sir:-- 



Your letter and the specimen referred to bg.t« been received. 

 The loose paniole of long slender branches, and the long callus 

 hairs indicate G. canadensis with which the specimen agrees 

 perfectly except in having spike] ets scarcely 2.5 mm. long. 

 I do not find any specimens with spikelets quite so small as this "but 

 there are a number with spikelets less than 3 mm. These are from 

 Saskatchewan, Montana, 'Wisconsin, District of Columbia, showing 

 no geographical limitation. You will find a piece of rootstock 

 at the be.se of your specimen. I am returning the specimen by me. j 1 • 

 It reached here safely and I trust will return as safely. 



I have corrected my Rhodora by transferring P. umbrosum to 

 P. Ashei. We do not know what P. umbrosum of Retains is. It has 

 been referred to P. proatratum Lam. reptans I. ) but the 



description does not well apply to that nor does P. reptans in 

 this country grow in shady woods. That provision of the 



