338 SALICINE^E. (WILLOW FAMILY.) 



12. S. glauca, L., var. villosa, Anders. Leaves oblanceolate, acute, 

 attenuate at base, entire, 2 to 4 inches long, varying from soft villous to 

 scarcely pilose when young, at length glabrate and rigid, more or less glau- 

 cous beneath ; stipules lanceolate : aments short-peduncled, cylindrical, the 

 fertile w/ien mature sometimes very large, 2 to 3 inches long : scales oblong- 

 obovate, rather acute, brownish : capsules lanceolate-acuminate, tomentose, at 

 length subglabrate : pedicels equalling the nectary : style produced, entire or 

 deeply bifid ; stigmas entire or bifid. A diffuse shrub, 3 to 7 feet high, with 

 short and stout branches, differing from typical S. glauca only in the less 

 woolly and more pointed capsules and the usually entire styles. Low meadows, 

 foot-hills of the mountains. 



13. S. desertorum, Richards. Leaves elliptical-oblanceolate, rigid, more 

 or less whitish-tomentose beneath, the yellow midrib prominent : aments very 

 short, subglobose or oblong, densely flowered : scales pale rose-color, densely white- 

 villous : capsules ovate-conical, white-woolly, sessile : style short ; stigmas bifid. 



Var. ? Wolfii. Leaves at length smooth, scarcely paler beneath, with a 

 tendency to blacken in drying : scales very dark, sparingly villous : capsules 

 reddish, glabrate: style entire; stigmas notched. S. Wolfii, Bebb, Bot. 

 Wheeler Exped. 241. 



A low, 1 to 2 feet high, scraggy shrub, growing in clumps on alpine slopes 

 far above the timber line. The leaves scarcely exceed an inch in length by 

 2 or 3 lines in width, the small, roundish compact aments very numerous, less 

 than half an inch long, on short peduncles which are invested with two or 

 three narrow leaf-like bracts often exceeding the anient in length. This is 

 the typical form, Drummond, n. 657 ; Hall $ Harbour, n. 523. Toward the 

 fcot-hills occur " varieties which have a very different aspect, with much larger, 

 more woolly leaves, and longer and looser catkins," (Hooker,) presenting a 

 manifest transition into S. glauca-villosa. 



14. S. arctica, R. Br., var. petraea, Anders. Leaves obovate, obtuse or 

 lanceolate and tapering somewhat equally to the base and apex, an inch long, 

 to inch wide, entire, green on both sides, slightly paler and prominently 

 nerved beneath : aments terminal, erect, at length thick and densely flowered, 

 1 to 2 inches long : scales dark, thinly pilose : capsules ovate-conical, 2 to 3 

 lines long, tomentose, subsessile, the nectary rather exceeding the base of the 

 capsule : style elongated, slender, entire ; stigmas bifid, divaricate. Far 

 above the timber line in little patches among the rocks, frequently blooming 

 close to snow-banks. A very small creeping shrub, the half-buried hori- 

 zontal branches sending up short few leaved twigs, which, with the conspicu- 

 ous aments, rise only 2 to 3 inches above the surface. Colorado, California, 

 and northward in other forms to the limit of vegetation. 



-w. *+ Styles none : alpine shrubs with orbicular, reticulate-veined leaves. 



15. S. vestita, Pursh. Leaves elliptical or oblong-ovate, obtuse, rounded 

 at base, 1 to 2 inches long, obscurely crenulate, strongly reticulate on both 

 surfaces, green above, glaucous beneath, and beautifully clothed with silky 

 hairs, especially along the prominent midrib and excurrent veins; petioles 

 short, about the length of the large, obtuse buds : aments on short villous 

 peduncles opposite the last of 2 or 3 leaves on the branch, elongate-cylindrical, 



