338 SALICINF^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 when 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. desertomm, 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. ? Wolfli. 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 Bxped. 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 ament iu length. This is 

 the typical form, Drummond, n. 657 ; Hall 8f Harbour, n. 523. Toward the 

 foot-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. arotiea, R. Br., var. petrsea, Anders. Leaves obovate, obtuse or 

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

 i to J 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. 



++ ++ 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 



