SALICACEAE. 115 



villous), green above, paler to glaucescent beneath; aments clustered, terminal 

 on leafy branchlets; pistillate 3-7 cm. long; ovary villous; capsule subsessile, 

 lanceolate, 5-7 mm. long, thinly villous to glabrous; style about 0.5 mm. long, 

 divided; stigmas 1 mm. long, divided, linear; staminate ament shorter; stamens 

 2; filaments pubescent; anthers 1 mm. long; scales in both sexes 2.5 -3.5 mm. 

 long, glabrous. 



S. sessilifolia of authors, not of Nuttall. A distinct species probably but 

 not certainly S. fluviatilis Nutt. On the Columbia River at and near the 

 mouth of the Willamette and southward in Multnomah County, Oregon. 

 Nuttall collected his original specimens on " the border of the Oregon, a little 

 below its confluence with the Wahlamet." 



Salix sessilifolia Nutt. Shrub 2-3 m. high; branchlets villous-tomentose 

 with spreading hairs, those of the season densely so; stipules ovate-lanceolate, 

 1-4 mm. long; leaves narrowly to broadly lanceolate or elliptic-lanceolate, 

 2.5-5 cm. long, 8-15 mm. wide, the sprout leaves larger, acute to rounded at 

 the base, acute or short-acuminate and subaristate at the apex, spinulose- 

 denticulate, especially on the outer half, green and densely to thinly lanate- 

 tomentose with spreading hairs on both sides; aments appearing after the 

 leaves, solitary (?), terminal or falsely lateral, on short leafy peduncles 1-5 

 cm. long; pistillate aments 4-6 cm. long, the deciduous yellow_scales broadly 

 elliptic-lanceolate, densely villous; pedicel 0.5 mm. long, villous; capsule 

 lanceolate, 5-6.5 mm. long, villous; style about 0.5 mm. long, divided; stigmas 

 nearly 1 mm. long, divided; staminate aments not seen on typical material 

 (on approximately typical specimens 3-4 cm. long; scales elliptical, pilose- 

 pubescent; stamens 2; filaments pubescent, free; anthers about 1 mm. long). 



Common in the upper Willamette Valley and on the Umpqua at Roseburg. 

 Nuttall's type in the British Museum is matched by Hall, no. 474, Western 

 Oregon, and Cusick, no. 1514?, Linn County, Oregon. Henderson, April 25, 

 1885, Oregon City, Oregon, and Ball, no. 1978, Corvallis, Oregon. Nuttall's 

 original specimens were collected on the "rocky borders of the Oregon at 

 the confluence of the Wahlamet.'' 



Salix prolixa Anderss. Low shrub; branchlets slender, dark, glabrous; 

 stipules minute or wanting; leaves oblanceolate or lanceolate to broadly 

 lanceolate, acute, 3-6 cm. long, entire or very shallowly serrulate, green above, 

 paler to glaucous beneath, glabrous, loosely reticulate on both surfaces with 

 slender raised veins; aments on short leafy peduncles, appearing with the 

 leaves; pistillate 3-5 cm. long, very lax; scales tawny, oblanceolate, acute, 

 very small, thinly tomentose; capsule 3-4 mm. long, glabrous; pedicel slender, 

 3-5 mm. long; style about 0.3 mm. long; stigmas short; staminate aments 

 2-3 mm. long; stamens 2; filaments glabrous, free; anthers round, dark. 



Rare in our limits; "not uncommon around Victoria, Vancouver Island," 

 Macoun. 



Salix pedicellaris hypoglauca Fernald. Shrub, 1-2 m. high, glabrous 

 throughout; leaves elliptic to obovate, 2-4 cm. long, entire, mostly obtuse, 

 narrowed at the base, short-petioled, firm in texture, green above and glaucous 

 beneath, finely reticulate on both sides; aments 1-2 cm. long, appearing with 

 the leaves and borne on leafy-bracted peduncles; stamens 2; capsules narrowly 

 conic, 5-7 mm. long, glabrous; pedicels slender, 2-3 cm. long, longer than the 

 persistent acutish thinly villous scale; style very short. 



In sphagnum bogs. 



Salix mackenziana (Hook.) Barr. A shrub or small trees, 2-6 m. tall, 

 with elongated dark sometimes tomentose branchlets; leaves lanceolate or 

 ovate-lanceolate, to conic-lanceolate (often obovate while expanding), short- 

 acuminate, rounded to cordate at the base, glandular-serrulate, 6-10 cm. long, 

 glabrous, glaucous beneath; petioles stoutish; stipules reniform to sublimate; 



