SALICACE.E 619 



closely sessile : style evident ; stigmas linear, several times longer than 

 thick. On sand bars along rivers, Oregon and Washington. 



S macrostachya Nutt. I. c. A shrub or small tree 3-18 feet high, of- 

 ten in dense thickets, with light brown bark and cinereous branches, the 

 young branchlets villous: leaves 2-3 inches long, sessile, oblanceolate to 

 elliptical, acute at both ends, more or less villous-pubescent, entire or 

 nearly so: stipules obsolete: aments on short leafy lateral branchlets, ap- 

 pearing after the leaves, 1-2 inches long: lower half of the filaments crisp- 

 villous : capsule closely sessile, clothed with long lax hairs : style evident ; 

 stigmas linear. Margins of ponds, Oregon to California. 



3 Shrubs or small trees. Scales of the aments persistent, 

 darker at the apex. 



S Scouleriana Barratt in Hook. Fl. ii, 145. S. flavescens Nutt. A 

 shrub or small tree 10-50 feet high, with light gray bark and cinereous 

 branchlets: leaves oblanceolate to oblong or elliptic, obtuse to acute or 

 acuminate, narrowed below to short petioles, entire or serrulate, 1-6 inches 

 long, glabrous and dark green above, pale and more or less pubescent and 

 becoming rusty in age beneath : stipules ovate to oblong, large and persis- 

 tent on vigorous shoots : aments appearing long before the leaves, very 

 densely flowered; staaainate aments sessile, about an inch long and half as 

 thick, * the orbicular to oblong scales black or red at the apex, densely 

 woolly with long white hairs : stamens 2, distinct ; the filaments glabrous": 

 pistillate aments short-peduncled, 1-2 inches long when mature, the scales 

 oblong to lanceolate, silky with long white hairs : capsule oblong with a 

 stout beak, pubescent, on pedicels a line or more long, maturing before the 

 leaves appear ; stigma sessile. Common from Brit. Columbia to California 

 and the Rocky Mountains. 



S. bella Piper Bull. Torr. Bot. Club xxvii, 399. A shrub or tree 6-12 

 feet high with slender erect branches and smooth gray bark : branchlets 

 shining yellow, usually glabrous, very brittle: leaves lanceolate to oblong 

 or oblong-obovate, acute, 1-3 inches long, green and glabrate above, densely 

 silvery-woolly beneath, entire or nearly so, short-petioled : stipules lunate, 

 usually persistent: aments appearing before the leaves ; staminate sessile, 

 short and thick, 6-12 lines long; scales acute, black, densely villous : sta- 

 mens 2: pistillate aments short-peduncled, 6-18 lines long; scales black, 

 obtuse, densely villous : capsules silky-hairy, nearly sessile : style about a 

 line long. Along the Palouse river eastern Washington. 



S. Gcyeriana Anders. Sal. Monogr. 86, fig. 50. A shrub 10-15 feet 

 high, the branchlets usually covered with a glaucous bloom : leaves lanceo- 

 late, acute at both ends 2-3 inches long by 4-6 lines wide, downy above, 

 grayish beneath with soft silky hairs, entire : stipules none : aments at first 

 small, subglobose, nearly equaled by the 3 or 4 silky bracts at their base, 

 becoming short-peduncled in fruit : scales tawny, obtuse, sparingly villous : 

 capsule tapering from an ovate base, silky- tomentose: pedicels slender, 

 puberulent, 4-5 times as long as the nectary : stigmas sessile, bifid. Oregon 

 to California and the Rocky Mountains. 



S. Hookeriana Barratt 1. c. 445. A large shrub or small tree 10-50 

 feet high, with dark rough bark and gray pubescent branchlets: leaves 

 lanceolate to oblong or elliptic, 1-5 inches long, green and smooth above, 

 densely tomentose beneath, entire, rounded at base, short-petioled : aments 

 appearing before the leaves, the staminate very densely flowered, 1-3 inches 

 long, the scales densely tomentose with long white hairs. Along the coast, 

 Oregon and Washington. 



S. rostrata Richardson Franklin Journ. App. 753. A much branched 

 shrub 6-9 feet high, with elongated branchlets: leaves oblong to lanceolate 



