SALICACEAE. 91 



2. S. lasiandra Benth. A middle-sized tree with rough bark; 

 leaves rather broadly lanceolate, 7-15 cm. long, abruptly tapering 

 at the base, acuminate at apex, sharply and closely serrulate, pale 

 beneath; petioles glandular at the base of the blade; stipules small, 

 glandular-serrate; aments on long peduncles, the pistillate 5-7 cm. 

 long; bracts of the staminate yellowish, toothed; stamens usually 5; 

 ovary glabrous; stigma nearly sessile, bifid; capsule lanceolate, 6-8 

 mm. long, on pedicels 2 mm. long. 



Occasional along streams in the valleys. Los Angeles River, near 

 Cahuenga Pass. A form with smaller leaves and aments is appar- 

 ently frequent along all the streams in the valleys; it is near the 

 type, but the petioles and stipules are inconspicuously glandular. 



3. S. laevigata Bebb. Tree 10-15 m. high; branches reddish- 

 brown; leaves lanceolate to oblong-lanceolate, serrulate, green and 

 shining above, more or less glaucous beneath, 8-12 cm. long, gla- 

 brous; petioles about 1 cm. long; puberulent above and somewhat 

 grooved; staminate aments usually flexuose, 5-7.5 cm. long; bracts 

 more or less elliptic, woolly at base, glabrous and pallid towards the 

 apex; stamens 5-6; filaments pubescent below; capsule conic from a 

 thick base, acute, glabrous, on pedicels 3-4 times as long as the 

 gland; stigma nearly or quite sessile, emarginate. 



Frequent along all streams, especially in the canyons. 



4. S. lasiolepis Benth. Tree or large shrub, 4-8 m. high; leaves 

 oblong or somewhat broadest above the middle, obscurely and 

 irregularly serrulate, dull green above, more or less gray-pubescent 

 beneath, 12-20 mm. broad, 5-7 cm. long, on petioles 5-10 mm. long; 

 aments appearing before the leaves, suberect; the staminate 2-4 

 cm. long; stamens 2; pistillate 2.5 cm. long or less; capsule acute, 

 smooth, short pedicelled; styles rather short; stigmas erect. 



The most common willow, covering a considerable area along the 

 Santa Ana and San Gabriel Rivers toward the coast. 



5. S. scouleriana Barr. Small tree, 4-10 m. high, with dull gray 

 bark; leaves variable, mostly narrowly obovate, obtuse at the apex 

 and cuneate at base, 3-12 cm. long, entire or shallowly serrulate, 

 dark green and glabrous above, pale beneath and usually rusty 

 pubescent; stipules ear-shaped, denticulate; aments densely flow- 

 ered, appearing before the leaves, 2-5 cm. long; capsules tomentose; 

 stigmas sessile, long; scales obovate; black, long-hairy; filaments 

 free, glabrous. 



Borders of mountain streams and meadows; San Bernardino 

 Mountains, but not reported from the San Gabriel. 



6. S. exigua Nutt. Small shrub or becoming a small tree; 

 branches light brown; leaves 4 cm. long, 1-2 cm. wide, yellowish, 

 closely sessile, entire or nearly so, canescent when young, usually 

 becoming quite glabrous at maturity, very narrowly elliptic, veins 

 very indistinct; stipules none; aments 2-5 cm. long, on peduncles 

 about the same length, appearing with the leaves, rather densely 

 and evenly flowered, sometimes the lower flowers remote; scales in 

 the staminate ament oblong to obovate, in the pistillate narrower 

 and longer, smooth or more or less crisp villous on the margins; 

 capsule closely sessile, lanceolate, glabrous, light green; stigmas 



