252 ROWLEE : NORTH AMERICAN WILLOWS 



ament, narrower and more acute in the pistillate, glabrous on the 

 back, crisp, hairy on the margin and toward the base, erose toward 

 and at the apex, lower half of the filament densely crispy hairy : 

 capsule lanceolate, covered with straight appressed silky hairs, 

 closely sessile : stigmas sessile, oblong, about twice as long as thick, 

 mature capsule often nearly glabrous. 



This species is distinguished by its narrowly lanceolate entire 

 leaves, obsolete stipules, small and rather narrow aments, erose 

 scales and hairy capsules. 



Salix argophylla occurs on the Pacific slope from southern Cali- 

 fornia to British Columbia. 



CALIFORNIA : Panamint Mountains (F. V. Coville and F. 

 Funston, no, 788), Sierra Valley (J. G. Lemmon), North Idria 

 (H. N. Bolander, no. 766), Yosemite Valley (Anderson), San 

 Bernardino (W. G. Wright, nos. 3 and 4), Banks of the Merced 

 (W. H. Brewer, no. 5031), Tulare Co. (F. V. Coville and F. 

 Funston, no. 1 267), San Bernardino (S. B. and W. F. Parish, nos. 

 640, 2140). 



OREGON: Union Co. (W. C. Cusick, no. 1044), Hood River 

 (J. and T. H. Howell). 



WASHINGTON : Klickitat Co. (W. N. Suksdorf, no. 34), Sprague 

 (Leiberg and Sandberg, no. 134); British Columbia: Spences 

 Bridge, Thompson River (J. M. Macoun, no. 13). 



7. Salix Thurberi sp. nov. 



Slender shrub two or three meters high ; bark of older branches 

 brown and glabrous, younger branches puberulent : leaves linear- 

 lanceolate, 68 cm. long, 23 mm. wide, sessile, evenly denticu- 

 late, thin, midrib prominent, silvery silky when young, becoming 

 glabrate : stipules none : aments on long leafy peduncles 56 

 cm. in length : flowers borne in verticels, axis silvery canescent, 

 scale lanceolate, acute, midvein prominent : capsule densely clothed 

 with silvery white ascending hairs, very short pedicelled, gland 

 about equaling the pedicel : style very short: stigmas divided: red, 

 stamens with filaments hairy below, gland in staminate flower one. 



This species occurs in southern and western Texas and was 

 observed and collected there by Geo. Thurber many years ago. 

 His specimens (nos. 2368, 95, and 2341) are in the Gray Herba- 

 rium. It has been referred heretofore to S. interior ; it is easily 

 distinguishable from that species by the long thin leaves, single 



