WILLOW FAMILY 



493 



n. Salix 



exigua 



Nuttall. Slender Willow, 



Fig. 



1200. 



Salix exigua Nuttall, Sylva 1: 75. 1843. 



Sallx longifolia exigua (Xutt.) Bebb, Willows, Calif 

 (repr. S. Wats. B'ot. Calif. 2: 85.) 1879. 



Salix fluviatilis exigua (Nutt.) Sarg. Silva N. Am. 9: 

 124. 1S96, in part. 



Shrub 2-4 m. high; color effect grayish; 

 leaves linear, acute at both ends, 5-12 cm. long, 

 2-10 mm. wide, entire or remotely denticulate, 

 opaque, more or less canescent on both sur- 

 faces or silky with a fine silverj- tomentuni 

 beneath, or on both surfaces on young shoots 

 (then frequently mistaken for ^. argophylla) ; 

 peduncles sometimes 7 cm. long; staminate 

 aments 2-4 cm. long, the pistillate 3-6 cm. 

 long ; scales lanceolate, mostly acute, glabrate 

 or more or less white-pilose ; capsules nar- 

 rowly lanceolate, 4-6 (mostly 5) mm. long, 

 sessile or short-pedicelled, especially at the 

 base of the ament, glabrous or thinly villous; 

 gland about 0.5 mm. long; stigmas sessile, 

 divided, about 0.5 mm. long. 



Very common along mountain streams and wet places from sea level to 6,000 feet elevation, Sonoran 

 and Transition Zones; Fraser River in British Columbia southward, east of the Cascade and Sierra Ne- 

 vada ranges, throughout southern California, and east to Alberta and New Mexico or west Texas. Type 

 locality: probably "on the banks of Lewis River of the Shoshone" (the Snake River, in Idaho). 



Variety rnrens Rowlee (Bull. Torrey Club 27: 255. 1900) apparently represents merely the large green- 

 ish, glabrate leaves found commonly with normal foliage. 



Salix exigua nevadensis (S. Wats.) Schneider, Bot. Gaz. 67: 331. 1919. (Salix nevadensis S. Wats. Am. 

 Nat. 7: 302. 1873.) Capsule (and ovary) glabrous, short-pedicelled, with both dorsal and ventral glands- 

 leaves may be somewhat shorter and broader. 



With the species, east central California (Nevada County) southward to the border and east to south- 

 eastern Idaho and southern Utah. 



12. Salix melanopsis Nuttall. Dusky Willow. Fig. 1201. 



Salix melanopsis Nutt. Sylva 1: 78. pi. 21. 1843. 



Dark green shrub or small tree, 3-5 m. 

 high, more divaricately branched than the 

 related species; twigs brown to blackish, 

 often lustrous; leaves oblanceolate to ellip- 

 tical, acute at both ends, 4-6 or 8 cm. long, 

 6-15 mm. wide, rather closely denticulate, 

 often spinulose-denticulate. especially near 

 the apex, or subentire, dark green and 

 glabrous above, paler to glaucescent be- 

 neath; stipules lanceolate to semicordate, 

 dentate; aments slender, 3-4 cm. long, the 

 pistillate 7-8 mm. wide; scales oblong to 

 obovate, sometime erose at the apex, glab- 

 rous to thinly pilose outside, the pistillate 

 often plainly striate with 3-5 nerves ; cap- 

 sules ovate-lanceolate, glabrous, sessile or 

 subsessile, 4-5 mm. long. 



Stream banks. Upper Sonoran and Transition 

 Zones; Rocky Mountains of Alberta and Briti=h 

 ( olumbia south to southern California, east to 

 western Montana and Wyoming and northeastern 

 Ltah. Type locality: "Fort Hall, on the alluvial 

 lands of Lewis River of the Shoshonee" (Snake) 

 in southeastern Idaho. 



Salix melanopsis bolanderiana (Rowlee) Schneider, Bot. Gaz. 67: 338. 1919. (Salix bolanderiana Row- 



ee. Bull. Torrey Club 27: 257. pi. 9, f. 9(1). 1900.) Leaves more or less densely pubescent to densely gray- 



tomentose beneath. The characters given by Rowlee do not separate his species in any way from true 



melanopsis. The characters assigned by Schneider (longer leaves, wider aments, and longer capsules) are 



not shown by the type (Bolander 4958), which is pubescent beneath, or by the topotype (Bolander 5031). 



With the species throughout; abundant in Glacier National Park. Type locality: "Yosemite Valley in 

 California (Bolander 4958, 5031)." 



