UNITED STATES DEPARTMENT OF AGRICULTURE, 

 BUREAU OF PLANT INDUSTRY. 



TAXONOM1C AND RANGE INVESTIGATIONS. 



Washington, D. C, February IS, 1911 



Mr. Walter Deane, 



29 Brewster St . , 

 Cambridge , Mass . 



Dear Sir: 



Your letter of February 10 came just as we had gone over 

 your specimens of Panicum. "W. Herriot" is the way Mr. Herriot 

 s i gns hi s name . 



Most of your puzzling specimens under g, ted^toanaa* and 

 "P. barbulatum" are probably V. luei&ttffl, Mr. Bissell had similar 

 specimens from Connecticut when he was here, but being all of 

 the vernal form, they were too uncertain for an extension of 

 range. I wish some one would collect the autumnal form in Kew 

 England and settle the doubt. The plant is then unmistakable, 

 spreading out like a slender vine. I have generally found it 

 more or less hidden under brush, Smilax and the like. If you 

 collect the autumnal form we shall be glad to have specimens of 

 it. 



Panicum clute_i is but doubtfully distinct from P. Wfctt—ttf- 

 keetense. The two types are the two extremes and if there were 

 not so many intermediates would be readily admitted as two species, 

 P. commons ianum and P. addisonii are another such pair. In these 

 cases the intermediates were hardly numerous enough to necessitate 

 reducing one to a subspecies. 



