130 SALICACEAE (WILLOW FAMILY) 



aments yellow, 3-5 cm. long; pistillate aments lax in fruit, 4-8 cm, long: cap- 

 sules lanceolate, 4-5 mm. long; pedicels filiform, 2 mm. long. PEACH -LEAVED 

 WILLOW. Common on banks of streams and wet ground throughout to an al- 

 titude of 2,000 m. A form with very narrow leaves, scarcely 1 cm. wide, is 

 found on the high plains east of the Rocky Mountains. 



II. PENTANDRAE. Tall shrubs or small trees (within our range) with sparingly 

 caespitose stems, 3-6 m. high, and reddish-brown bark; twigs and obtuse buds 

 stouter than in AMYGDALINAE, olive to reddish-brown, lustrous: leaves large, 

 lanceolate or elliptical, acute to long-acuminate, closely glandular-serrate, 

 especially near the base, glabrous; petioles stout, glandular near the distal 

 end or naked; stipules small or none: aments coetaneous, stout, dense, oblong, 

 on short lateral leafy twigs, 1-2 cm. wide; scales pale yellow, deciduous, lan- 

 ceolate to obovate, thinly pilose at the base: capsules rather large, 5-9 mm. 

 long, glabrous; pedicels 1-2 mm. long; styles about 0.5 mm. long; stigmas short, 

 notched or bifid. 



Fruiting in early summer; capsules thin-walled, 5-7 mm long. 



Leaves short-acuminate, glaucous beneath . . . . . 3. S. lasiandra 



Leaves long-acuminate, scarcely paler beneath . . . . 4. S. Fendleriana. 



Fruiting in late summer; capsules thick-walled, 7-9 mm. long . 5. S. serissima. 



3. Salix lasiandra Benth. PI. Hartw. 335. 1849. A small tree within our 

 limits; twigs rather stout, deep red, lustrous: leaves lanceolate to broadly 

 lanceolate or sometimes oblanceolate, acuminate at the apex, acute to rounded 

 at the base, dark green and shining above, glaucous beneath, 6-10 cm. long, 

 1.5-3.5 cm. wide; stipules small, acute, glandular: aments on peduncles 1-6 

 (usually 2-3) cm. long; staminate aments 2-6 cm. long, 1-1.3 cm. wide; 

 pistillate aments 3-10 cm. long, 1.2-2 cm. wide; scales lanceolate to ovate, 

 sometimes glandular at the apex: capsule pale straw-color or light brown, 

 lanceolate, 5-7 mm. long: pedicel 1.5-2 mm. long, 4-6 times as long as the 

 gland. Rare in our limits; Sante Fe, New Mexico, to California, and north- 

 ward. 



4. Salix Fendleriana Anders. 1. c. 115. Twigs long but not slender, shin- 

 ing, reddish or reddish-yellow: leaves narrowly lanceolate to lanceolate, long- 

 acuminate, dark green on both sides or somewhat paler but never glaucous 

 beneath, 6-13 cm. long, 1.2-3 cm. wide; stipules usually none, if present, 

 small, semicordate to reniform: staminate aments 2-4 cm. long, 1-1.2 cm. 

 wide; pistillate 2-5.5 cm. long, 1.5 cm. wide; scales lanceolate to oblanceolate: 

 capsule pale straw-color or brownish, 5-7 mm. long; pedicels 1-1.5 mm. 

 long; styles 0.5-0.7 mm. long. FENDLER'S WILLOW. [S. lasiandra caudata 

 (Nutt.) Sudw.] Mountain streams and wet places, at 1,500 to 3,000 m. altitude, 

 common; New Mexico to Canada and west to the coast. 



5. Salix serissima (Bail.) Fern. Rhodora 6: 6. 1903. A shrub or small 

 tree, sometimes 4 m. in height; twigs lustrous, bright red or brownish: leaves 

 elliptic-lanceolate, acute at both ends or short-acuminate at the apex, closely 

 glandular-serrulate, dark green and shining above with the midrib whitish, 

 pale or subglaucous beneath, coriaceous, 4-8 cm. long, 1-25 cm. wide; petioles 

 more slender than in the related species: aments very short and stout; the 

 staminate 1-2 cm. long, 1-1.2 cm. thick; scales broad, obtuse; pistillate ament 

 1.5-3 cm. long, 2-2.3 cm. wide, usually loosely flowered: capsules lustrous, 

 long-conic, thick-walled, olive-brown to deep brown, 7-9 mm. long; pedicels 

 thick, 1-15 mm. long, 2-3 times as long as the gland. AUTUMN WILLOW. 

 Wet ground; Montana to Alberta, eastward to New Jersey and New England. 



III. LONGIFOLIAE. Shrubs 2-5 m. high, with densely caespitose stems and gray 

 or light brown bark; twigs slender, brown or reddish, often lustrous: leaves 

 linear to linear-lanceolate or narrowly elliptical, remotely denticulate or en- 

 tire; petioles very short; stipules none: aments serotinous, terminating lateral 

 leafy branches, the staminate often and the pistillate occasionally in pairs 

 or threes; scales light yellow, deciduous: stamens 2, filaments hairy below: 

 capsules glabrous to thinly villous, 4-7 mm. long; styles none; stigmas short 

 (in our species), divided. 



