134 SALICACEAE (wiLLOW FAMILY) 



VI. CoMMUTATAB. — ShriAs :l-4 in. high; stems densely caesmtosej twigs, duTJ' 

 brown, lustrous: leaves oblaiiceolate to obopate-oval or flliptic-oval, eritirc 



. or shallowly, serrulate,, densely to thinly vilUnis-tomerdose, at- lea^t[ above, st^ip- 

 ulate: aments on leafy, peduncles (sessile in No. 16), px^cocious or coetaneofts: 

 scales fuscous, broad, obtuse, villous: capsules ovate or rostrate, glabrous or 

 tornentose; pedicels 0.5-1.5 mm. long; styles 1-1.5 mm. long (except in No. 18). 



t<eaves glabrate above, glabrous and glaucous beneath, crenate or serru- 

 late. '"' 



Aments sessile .-.16. S. monticola. 



Aments leafy-pedunculate 17, Si. ^arclayi. 



Leaves densely villous-tomentose to glabrate on both sides, dull green 



beneath. . . . . . . . . . . . 18. S. Wolfii. 



16. Salix monticola Bebb ip Coult. Man. 336. 1885. Shrub ,3-6 m. high; 

 twigs rather stout and divaricate, usually glabrous, deep reddish-brown, 

 lustrous: ;leaves at first oblanceolate, obovate or oval, finally more elliptical 

 or oblong-elliptioal, acute or abruptly short-^acuminate at the apex, usually 

 narrowed and rounded at the base or sometimes subcordate, 5-7 or more c;^. 

 long, 2-4 cm^ wide, crenate-serrulate, dark green above, subglaucous to glau- 

 cous beneath, glabrous or thinly puberulent or pubescent above, especially 

 on the pale yellow midrib and the primary veins, strongly reticulate beneath; 

 stipules large, ovate or semicordate, acute, serrate: buds large.:, amepts 

 sessile, stout, naked or the pistillate with a few broad bracts, at thq base, 

 2-3 cm long, the pistillate becomiflg, 3-5 cm. long in fruit;, scales, dark, 

 obovate-oval, obtuse, densely villous with long white hairs: capsule glabrous, 

 sessile or subsessile, rostrate, rufescent, 5-7 mm. long; styles 1-1.5 mm. long. 

 (.S. padifolia Rydb. not Anders.; S. padophylla Rydb. 1. c. 28: 499. 1901). — 

 Common at high elevations, 2,400-3,500 m.; New Mexico to Montana and 

 .Alberta. 



17. Salix Barclayi Anders. I. c. 125. Shrub 1-4 m. high; twigs short, stout, 

 divaricate, blackish, tornentose to glabrate: leaves ovate-lanceolate to oval 

 or obovate, acute or cuspidate at the apex, cuneate to rounded at the base, or 

 cordate on vigorous shoots, 3-7 cm. long, 1.5-2.5 or more cm. wide, prenate- 

 serrulate, the glandular teeth inflexed, or subentire, thinly, tornentose above, 

 especially on the midrib and veins, becoming glabrate, glabrous, reticulate 

 and mostly glaucous beneath; stipules large, jovate-acuminate, serrate: aments 

 stout, on leafy peduncles 1-3 cm. long;.staminate aments 1-3, and, the pistil- 

 late 2-6 cm. long, 1.5 em. wide; sca,les fuspous, mostly acute, thinly tq densely 

 villous with long hairs: capsules glabrous, or sometimes thinly sericeous, 

 greenish, rostrate, 5-7 mm. , long; pedicels 0.5-1 mm. long; styles 1-1,.,5 

 mm. long. (S. conjuncta Bebb, Bot. Gaz. 13: 111. 1888). — ^High elevations, 

 mountains of Colorado and , southeastern Wyoming to , Oregon, Washington, 



18. Salix Wolfii Bebb, Bot. Wheeler Exp. 241. 1878. Low shwb 6-10 dm. 

 high; twigs chestnut, leafy, the younger yellowish, lustrous: leaves oblanceo- 

 late or rhomboid-oblanceolate, or elUptical, acute at the apex, rounded at the 

 base, 2-4.5 cm. long, 8-13 mm. wide, entire, dull green and silky-viUous with 

 shining hairs on both sides, becoming somewhat glabrate; petioles yellow, 

 villous; stipules small or wanting: peduncles short, bearing several leaf-like 

 bracts which often exceed the ament; pistillate aments 1-2.5 cm. longj sub- 

 globose to oblong, densely flowered; staminate aments 0.5-1.5 cm. long; 

 scales dark, obovate, sparsely long-villous: capsules glabrous, greenish, or 

 rufescent, 3.5^.5 mm. long; pedicels about 0.5 mm. long; styles variable, 

 0.5-1 mm. long. S. desertorum PfoZ^V.— At middle to high ele;v^ations; south- 

 em Colorado to Wyoming and Idaho. 



18a. Salix Wolfii idahoensis Ball, Bot. Gaz. 40: 378. 1905. Leaves, larger, 

 3-6 cm. long, 1-1.8 cm. wide, oblanceolate: amenjis longer, 1-3,5 en),, in 

 length; pedvmcles proportionate: capsules about 5 mm. long, greenisl^i thinly 

 tomentose. This includes most of the material called " S.glauca viUpsq^". in 

 herbaria. — Big Horn, Mountains of north Wyoming to east Oregor ^.nd north 

 Idaho- ?/o'mdant '" the region qf the Yellowston- National Park. ; 



