116 SALICACEAE. 



aments appearing with the leaves, on short (4-8 mm.) peduncles bearing 2-3 

 small leaves; pistillate rather lax, 2.5-6 cm. long; scales oblanceolate, obtusish, 

 drying brown, thinly tomentose on the outside, densely so within; capsule 

 4.5-5.5 mm. long, glabrous; pedicel 2.5-4 mm. long; style about 0.5 mm. long; 

 staminate aments shorter and more dense; stamens 2; filaments 2, glabrous. 

 In moist ground, not common in our limits. This species and its subspecies 

 S. mackenziana macrogemma Ball have been confused with the eastern S. 

 cor data Muhl. 



Salix mackenziana macrogemma Ball, n. var. Branchlets densely pubes- 

 cent-tomentose with gray hairs; buds elongated, 10-16 mm. long, lanceolate, 

 acuminate, densely pilose-tomentose with long gray hairs; petioles and basal 

 portion of midrib on upper surface pubescent, otherwise as in the species. 



Seattle, Piper & Smith; Portland, Henderson; Corvallis, Ball. 



Salix barclayi Anderss. Shrub 1-4 m. high; leaves ovate-lanceolate to 

 elliptic, broadly oblanceolate or obovate, acute to abruptly-acuminate or 

 cuspidate, mostly rounded at base, 5-10 cm. long, crenate-serrate to subentire, 

 thinly tomentose but becoming glabrate above, paler to glaucous and glabrous 

 beneath; aments borne on leafy peduncles, 2-4 cm. long; the staminate 1-3 cm. 

 and the pistillate 2-6 cm. long; scales linear-lanceolate, acute, fuscous, villous- 

 tomentose; capsules 6-8 mm. long, glabrous to pubescent; style 1-1.5 mm. 

 long; stigmas short; stamens 2; filaments glabrous, free. 



In the mountains at about 2000 m. altitude, usually forming thickets. 



Salix commutata Bebb. Shrub 1-3 m. high; leaves oblong to broadly 

 oblanceolate or obovate, 6-10 cm. long, entire to minutely glandular-serrulate, 

 cuspidate, densely tomentose on both sides when young, becoming glabrate 

 in age, not paler beneath; aments appearing with the leaves, stout, 2-3 or 4 cm. 

 long, on leafy peduncles, as in S. barclayi; scales brownish, oblanceolate, 

 obtuse, woolly; capsule 5-7 mm. long, glabrous; pedicels 1 mm. long; style 

 1-1.5 mm. long; stigmas short; stamens 2; filaments glabrous, free. 



Higher altitudes in the mountains, often growing with 5. barclayi. 



Salix piperi Bebb. Large shrub, 5-6 m. tall; branchlets stout, glabrous, 

 shining; leaves broadly elliptical or oblanceolate, obliquely acute or acumi- 

 nate, serrulate, glabrous, shining green above, densely glaucous beneath; 

 stipules rare, if present, semicordate or reniform; aments precocious or appear- 

 ing with the leaves; staminate cylindrical, 3-5 cm. long, short-peduncled; 

 scales black, hairy; stamens 2, the glabrous filaments united at the base for 

 half their length; pistillate aments 4-10 cm. long, dense, on short leafy ped- 

 uncles; capsules 6-7 mm. long, glabrous; pedicel and style 1 mm. long. 



Along streams and in swamps. Described from Seattle, at or near its 

 northern li soumit; rangingthward through the Willamette Valley to Curry 

 County, Oregon. 



Salix hookeriana Barratt. Shrub or tree, 4-10 m. high, with rough dark- 

 gray bark; twigs densely pubescent and very brittle; leaves broadly lanceolate 

 to elliptic-oval, acute, crenate-serrate to subentire, dark green and glabrous 

 above, densely white- (becoming rusty-) tomentose beneath, 3-12 cm. long; 

 aments appearing before the leaves; staminate aments stout, short-cylindric, 

 densely flowered, 2-5 cm. long, the obovate scales black, densely covered 

 with long white hairs; pistillate aments 4-7 cm. long, stout; capsules usually 

 tomenfrose, sometimes glabrate; style 1 mm. long; stigmas short. 



A species occurring mainly near the ocean beach and rare along the shores 

 of Puget Sound. 



Salix sitchensis Sanson. Shrub with smooth gray bark, 2-7 m. high; 

 l>rnnchlets slender, at first downy; leaves oblong, spatulate or somewhat obo- 

 vate, mostly acute, dark green above, the veins conspicuous, covered beneath 



