322 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Shrub 0.5 to 1.5 meters high; twigs stout, short, with wrinkled bark, the younger more 

 or less gray-woolly; leaves elliptic-lanceolate, oblanceolate, or ovate-lanceolate, acute 

 at apex, acutish to somewhat heart-shaped at base, entire or with a few glandular 

 teeth, usually densely clothed with long gray hairs, becoming somewhat glabrate in 

 age, 4 to 7 cm. long, 1 to 2 cm. wide; catkins stout, sessile, on old wood, 4 to 7 cm. 

 long; capsules densely hairy, 7 to 9 mm. long, subsessile, bearing a style 1.5 to 2.5 mm. 

 long. 



The specimen collected in the park was only 30 to GO cm. high and differs from typical 

 material in the shorter and relatively broader, elliptic-oval leaves, 2 to 4 cm. long, 

 and aments (one) only 4 cm. long. A similar collection has been made in the Rocky 

 Mountain Park at Banff, Alberta. 



12. Salix Candida Fluegge. Sageleaf willow. In a cold bog about a spring 

 near Swiftcurrent Creek below Lake McDermott. Alta. south to Wyo. and eastward 

 to N. J. and Newf., in cold bogs and swamps. — Shrub 0.2 to 1 meter high; young twigs 

 white-woolly; leaves linear to oblong or narrowly oblanceolate, the margins inrolled, 

 entire, 3 to 8 cm. long, densely white-woolly beneath, thinly so above; catkins 1 to 3 

 cm. long, on short leafy peduncles; capsules subsessile, white-woolly, 6 to 8 mm. 

 long; style reddish, 1 to 1.5 mm. long. 



13. Salix brachycarpa Nutt. Occasional above timber line and in some localities 

 abundant; on open slopes or rock slides or in wet meadows; also in an open mossy bog 

 along Appekunny Creek. Sask. and Alta. to southern Colo., west to Utah, eastern 

 Oreg., and B. C. (S. stricta Rydb.) — Alpine shrub 0.2 to 1 meter high; young twigs 

 woolly; leaves elliptic-oblong or oblanceolate to narrowly obovate, 2 to 3.5 cm long, 

 cutish at apex, mostly obtuse at base, yellowish green on both sides, somewhat woolly 

 above, densely yellowish-woolly beneath, sometimes becoming glabrate, entire; 

 catkins numerous, roundish to oblong, 0.5 to 2 cm. long; capsules ovoid-lanceolate, 

 5 to 7 mm. long, subsessile, woolly; styles 1 to 1.5 long. 



14. Salix glaucops glabrescens Anderss. Frequent above or near timber line, in 

 meadows, on gravelly slopes, or in moist woods; also in thicket along Swiftcurrent 

 Creek below I-ake McDermott. Yukon and Alaska south to N. Mex. and west to 

 Utah and Idaho. {S. glauca glabrescens C. Schneid.; S. pseudolapponum Seem.) — Sub- 

 alpine shrub, 0.4 to 1.5 meters high; twigs shining brown, the bark separating in gray 

 papery flakes; leaves elliptic-lanceolate, oblanceolate, or obovate-oblong, entire, 

 3 to 6 cm. long, thinly gray-woolly to glabrate on both sides, glaucous beneath, often 

 drying dark; catkins 2 to 5 cm. long, on leafy peduncles 2 to 3 cm. long; scales yellowish 

 throughout or brownish at the tip; capsules gray-woolly, 6 to 8 mm. long; pedicel and 

 style each about 1 mm. long. 



15. Salix petrophila Rydb. Abundant above timber line, in meadows or on rocky 

 slopes; a characteristic plant of alpine meadows, frequently forming large dense 

 mats. Alta. and B. C, south to northern N. Mex. and west to Calif, and eastern 

 Oreg. — Stems creeping; branches erect, 5 to 10 cm. high, glabrous; leaves broadly 

 elliptic and acutish to narrowly obovate and often obtuse, entire, 1.5 to 4 cm. long, 

 deep green above, pale and rather strongly veined beneath, sparingly hairy to 

 glabrous, petioles slender, yellow; catkins 1 to 3 or 4 cm. long, on short leafy branches; 

 capsules lanceolate, sessile, gray-woolly, 4 to 6 mm. long; style 1 to 1.5 mm. long. 



16a. Salix anglorum araioclada C. Schneid. Frequent above timber line, in wet 

 meadows or on rocky slopes. Rocky and Selkirk Mts., northern Mont, to B. C. and 

 Alta., also eastern Que. — Plant prostrate; branches yellowish to purplish; leaves 

 thin, papery, oval, elliptic, ovate-elliptic, or obovate-elliptic, usually obtuse at 

 apex, entire, 2 to 5 cm. long, 1 to 3 cm. wide, usually glabrous at maturity, deep 

 green above, glaucous beneath; catkins on leafy branches 3 to 4 cm. long, the pistillate 

 3 to 5 cm. long in fruit; capsule 7 to 8 mm. long, subsessile, gray-woolly; style 15 

 mm. long. 



