THE WILLOWS OF ALASKA 317 



and Kearney (Nos. 623, 641, 652, 660, 700), Trelease and Saunders 

 ^Nos. 3406, in part, 3459 to 3461), Trevor Kincaid, 1897. 



Takutat Bay. — Common all about the bay, Coville and Kearney 

 (Nos. 1034, 1046, 1060, 1 1 19, 1 139, 1 152), Trelease and Saunders 

 (Nos. 3415, 3462, 3466 to 3468, 3471, 3473), Frederick Funston, 

 1S92 (No. 6). 



Prince William Sound, — In Port Wells and in Columbia Fiord, 

 Coville and Kearney (Nos. 1260, 1361). 



Cook Lilet, — At Kenai, F. A. Walpole, 1900 (No. 1144), and an 

 abnormal form at Halibut Cove, Coville and Kearney (No. 2416a). 

 Also betsveen Cook Inlet and the Tanana River, E. F. Glenn, 1S99. 



Kadiak Island. — At various points near Kadiak village, Coville 

 and Kearney (Nos. 1436, 2329), Trelease and Saunders (Nos. 3476, 

 347S, 3479), Fernow, Cole, A. Kellogg, 1867 (Nos. 175, in part, 

 221, in part). Walter H. Evans, 1897 (Nos. 313, 314), F. A. Wal- 

 pole, 1900 (Nos. 1 149 to 1 153, 1 158, 1159). 



Alaska Peyiinstila. — At Kukak Bay, Trelease and Saunders (Nos. 

 3480,3481). 



Shii77iagin Islands. — On Popof and Unga, Coville and Kearney 

 (No. 1796), Trelease and Saunders (Nos. 3453a, 3455), Kincaid, M. 

 W. Harrington, 187 1-2. 



Unalaska. — Near Iliuliuk, Coville and Kearney (No. 1785), 

 Fernow, C. Hart Merriam, 1891, J. M. Macoun, 1891, 1896, B. W. 

 Evermann, 1892 (No. 19), Walter H. Evans, 1897 C^^* 537)- 



For remarks on the relationship of this species with Salix cominu- 

 iata^ see the notes under that species. 



8. SALIX COMMUTATA Bebb. Greenbacked Willow. 



Plate xxxvii. 

 Salix comviiitata Bebb, Bot. Gaz. 13 : no. 1888. 



An erect bushy willow commonly .5 to 1.5 meters in height, similar 

 to Salix barclayi but distinguishable by the characters given in the 

 key. The most prominent difference lies in the color of the backs of 

 the mature leaves, which in barclayi are covered with a conspicuous 

 bloom but in commutata have no bloom, but nearly the same green 

 color as the upper surface. The differences in the toothing of the 

 leaf margins of the two species are indicated in the plates. The 

 upper leaves on the leaf shoots of co?nmutata often present a grayish 

 appearance, due to a thin but permanent tomentum on both surfaces. 

 The species extends from the coast region of eastern Alaska southward 

 through British Columbia to Oregon, in Alaska not extending west of 



