256 Rowlee: North American Willows 



Parish), Aqua Caliente, Colorado Desert (S. B. and W. F. Parish, 



no. 729). 



Arizona: San Francisco Mountains (H. H. Rusby, no. 371), 



Tucson (G. Vasey, no. 7) ; Nevada (S. Watson), Virginia City 



(Bloomer). 



Utah : Dirty Devil River (L. F. Ward, no. 399). 



New Mexico : Crow Agency (T. C. Porter, no. 5). 



Colorado : Platte River (T. C. Porter, no. 6), Ft. Collins (C. 

 F. Baker, nos. 4 and 5), Headwaters of Clear Creek (H. N. 

 Patterson). 



Wyoming : Bitter Creek, Platte Canon, Pine Bluffs, Ft. Steele, 

 Laramie (A. Nelson, nos. 245, 2740, 2885, 3102, 3137), Yellow- 

 stone Park (J. N. Rose, no. 90), Ft. Bridger (T. C. Porter). 



South Dakota : Hermosa, Black Hills (P. A. Rydberg, no. 

 1020). 



Montana : Jefferson River (F. L. Scribner), Jacks River (W. 

 M. Canby, no. 3) (Tweedy). 



Idaho : Lewiston (A. A. Heller, no. 3007). 



Washington : Pullman (C. V. Piper, no. 1774). 



Oregon : Umatilla River (J. and T. H. Howell). 



The variety virens is quite distinct and may upon further in- 

 vestigation prove to be of specific rank. It is apparently confined 

 to Arizona and southern California. 



Arizona (J. T. Rothrock). 



California : San Bernardino (W. G. Wright, no. 2), Dos 

 Cabesas (C. R. Orcutt, no. 2227); Kernerville (W. G. Wright; 

 Santa Isabel Creek, San Diego Co. (R. D. Anderson, no. 700), A. 

 Kellogg and W. G. Harford, no. 922), banks of the Merced, near 

 Clarks (H. N. Bolander, no. 5031). 



11. Salix melanopsis Nuttall, Sylva, 1 : 1842 



" Shrub or small tree, bark of old branches dark chestnut brown 

 to nearly black, young branches puberulent, very leafy: leaves ob- 

 lanceolate or elliptical, closely sessile, 5 cm. long, 1 cm. wide, on 

 vigorous shoots, glabrous when mature, silky hairy when young, 

 very distinctly veiny beneath, somewhat glaucous, the margin with 

 rather low and close serrations : stipules lanceolate, few toothed: 

 aments long and slender, often flexuous on peduncles which 

 bear 5-8 leaves, 5-7 cm. long, 1-2 cm. thick, cylindrical, loosely 



