UNITED STATES DEPARTMENT OF AGRICULTURE 
BUREAU OF PLANT INDUSTRY 
WASHINGTON 
ECONOMIC AND SYSTEMATIC BOTANY 
June 24, 1920. 
Dr, B. L. HoMnson, 
Grey Herbarium, 
Cambridge, Massachusetts. 
Dear Dr. Robinson: 
I have your letter of June 21st concerning the 
British Guiana plants. I am very glad that you find them of 
use and that they will be a valuable addition to your collection. 
You, of course, understand that I went to British 
Guiana primarily to study and collect the grasses. The col- 
lection of other plants was incidental from my standpoint. 
For this reason I have no especial interest in the miscellaneous 
collection after they are distributed to the contributing insti- 
tu: ions. I think it would not be worth while to send me a list 
of the identifications, though, of course, the national Herbarium 
would be pleased to ha^ such a list. It seemed to me that it 
would be the best thing to turn over to you the responsibility 
of having the plants determined since you, probably more than 
the other institutions, are interested in the flora of north and 
South America, Therefore if you are vailing to undertake this 
I shall be very ^ad to turn the whole natter over to you to 
