This species is found in the high mountains west of the Groat 

 Basin southward as far as the Sierra Nevada of California. S. Cal- 

 ifornia is probably only an extreme modification of the same spe- 

 cie s. 



480. Peshastin. S. longi foli a Muhl . A form with very long, slen- 

 der aments. The same has been collected by Mr. piper in western 

 Washington and by Dr. Lyall in the mountains north of your local- 

 ity. 



In examining the willows which you send me from the Plain of 

 the Columbia or the mountains on the north, I am struck with a much 

 greater resemblance to the Flora of the Columbia river valley .much 

 farther down its course (say in Suksdorf's old collecting ground 

 Klickatat Co.) than I had expected to. find. The forms of S. las- 

 iandra, S. sitchgnsis, cordata , longi f olia, scouleriana &c. are 

 such as I should not have been surprised to rec eive from the Co- 

 lumbia any where clear down to its mouth. furthermore there is 

 not found in the entire collection a single species characteristic 

 of the Rocky Mountain Flora east of the Qreat Basin I shall be 

 glad to learn from you if in the Flora as a whole this relationship 

 is sustained. 



Let me thank you for the ample specimens. I do so enjoy 



having enough of a thing to fill a sheet while I am about it, espec 



so 



tally if the specimens are^judiciausly selected as are all that 

 come from your hand. 



Yours very sincerely, 

 M«S. Bebb 



