S. P. LANGLEY 



SECRETARY 

 CHAS. D. Walcott 



ACTING ASSISTANT SECRETARY 



IN CHARGE U. S. NATIONAL MUSEUM 



SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 



WASHINGTON, D. C, DeC, 23 , 189... 7 



Mr. waiter Deane, 



Cambridge, Mass. 

 My dear Deane : 



Your letter and package of Thasp ium — Zlzia were re- 

 ceived. The latter wqs returned last night, you have some very in- 

 teresting sheets but it is too bad that they are mostly all only 

 in flower. We do not h^ve a single Thaspium even T.barbinode from 

 New England and only a single specimen of Zizia. The two speci- 

 es of 2izia and Thaspium aureura ( trifoliatum) are three very dis- 

 tinct species with no intergradet so far as I have ever been able to 

 find out. I rarely see a specimen even in flower that I cannot 

 name * still it is hard to put down on paper characters that will 

 always separate them. I puzzled over your plants quite a little 



yesterday. I inclose a key which I wish you would look over and 



other 

 see how it works with your, specimens. 



The Thas pium with the central sessile flower which you say you 



named must be Zizia. 



