STANDLEY FLORA OF GLACIER PARK. 323 



16b. Salix anglorum kophophylla C. Schneid. Habitat of the last, often in the 

 highest, most exposed places. Cited by Schneider only from eastern Que. and Newf . — 

 Ae the last but the leaves thicker, broadly elliptic to roundish, more strongly nerved, 

 and more densely glaucous beneath. 



17. Salix subcoerula Piper. Common on the east slope at all altitudes; along 

 streams, in wet thickets, or on high slopes; scarce on the west slope, apparently, and 

 noted only at Avalanche Lake. Alta. and B. C, south to N. Mex., and Calif. — 

 Shrub 1 to 3 meters high; twigs glabrous, usually covered with a bluish powder; 

 leaves narrowly to broadly lanceolate or oblanceolate, acute at both ends, 3 to 6 or 8 

 cm. long, 0.8 to 2.5 cm. wide, entire or subcrenulate, green and sparsely pubescent 

 above, densely silvery-pubescent with short appressed shining hairs beneath; catkins 

 sessile or nearly so, the pistillate 2 to 4 cm. long; scales brown or black; capsules 



4 to 5 mm. long, subsessile or on pedicels 0.5 to 1 mm. long; style 1 to 1.5 mm. long. 



18. Salix drummondiana Barratt. ' Frequent at low and middle altitudes, and 

 sometimes found above timber line; in thickets or meadows, on moist slopes, or 

 along streams. Rocky and Selkirk Mts. of Alta. and B. C. and northwestern Mont. — 

 Shrub 1 to 3 (?) meters high; young twigs mostly pubescent or woolly, not bluish- 

 powdery; leaves obovate, obovate-oblong, or elliptic-oblanceolate, entire, broadly 

 acute to obtuse at apex, 3 to 6 or 8 cm. long, 1.5 to 3 cm. wide, densely silvery-woolly 

 beneath with a thick mat of tangled hairs, thinly so above; catkins as in No. 17; 

 capsules 5 to 6 mm. long, silvery-woolly; pedicels 0.5 to 1.5 mm. long; style 0.5 to 1 

 mm. long. 



19. Salix scoulerlana Barratt. Frequent at low and sometimes at middle altitudes, 

 in moist woods or thickets, along streams, or on rather dry, thinly wooded hillsides; 

 on the west slope frequently a small slender isolated tree; the only species of the 

 park, apparently, which ever attains the dimensions of a tree. Alta. to N. Mex. 

 and west to the coast.— Shrub or small tree, 2 to 4 meters high; twigs glabrate to 

 densely woolly; leaves obovate to broadly oblanceolate, obtuse or mostly abruptly 

 pointed at apex, wedge-shaped at base, entire or shallowly crenulate, dark green and 

 glabrate above, glaucous, net-veined, and often densely tomentose beneath; catkins 

 appearing before the leaves, sessile or nearly so, the pistillate 3 to 5 cm. long; scales 

 obovate or oblanceolate, black, covered with long shining hairs; capsules beaked, 7 to 9 

 mm. long, gray-woolly; pedicelslto 2 mm. long; stylesshort; stigmas aboutl mm. long. 



20. Salix bebbiana Sarg. Common at low altitudes, in swamps, along streams, 

 or on brushy slopes. Across the continent to Alaska, N. Mex., and Calif. — A shrub 

 or small tree, 2 to 5 meters high; leaves broadly oblanceolate to obovate-oval, entire 

 or somewhat crenulate, 2 to 5 cm. long, 1 to 2.5 cm. wide, dull green above, paler to 

 subglaucous and coarsely net-veined beneath, more or less gray-woolly on both 

 sides, especially beneath; catkins appearing before or with the leaves, the staminate 

 subsessile, 1 to 2' cm. long, yellow, the pistillate (on peduncles 0.5 to 2 cm. long) 2 to 



5 cm. long, very lax in fruit; scales yellowish, oblong, 2 mm. long; capsules 6 to 10 

 mm. long, thinly pubescent, on slender pedicels 2 to 5 mm. long. 



20a. Salix bebbiana perrostrata (Rydb.) C. Schneid. Occasional at low altitudes, in 

 the same situations as the species. Throughout the Rocky Mts. — Differs in the smaller 

 and thinner, elliptic or oblanceolate leaves, acute at both ends, 2 to 3.5 cm. long, 

 glabrous or glabrate on both sides, and more finely net-veined on the lower surface. 



21. Salix geyeriana Andersa. Belton, on a dry brushy slope. Mont, to Colo., west 

 to the coast. — Shrub 1 to 3 meters high; twigs glabrous, leafy, black with a bluish 

 powdery bloom; leaves linear-oblanceolate or narrowly elliptic, very acute at both 

 ends, 2 to 4 or 6 cm. long, entire, dark green above, more or less glaucous beneath, 

 thinly to densely silky-hairy on both sides; catkins on short leafy peduncles, 

 roundish, 1 to 2 cm. long, 1 to 1.3 cm. wide; capsules 5 to 7 mm. long, pubescent, on 

 stoutish pedicels about 2 mm. long. 



2048—21 7 



