100 Salicaceae 



stamens with filaments distinct or sometimes united be- 

 low. Pistillate usually erect or spreading ; ovary sessile 

 or short-stipitate ; style short or filiform, with 2 entire 

 or 2 cleft stigmas. Capsule mostly 2-valved. 



* Stamens 3 or more; aments terminating leafy branchlets. 



1. S. nigra vallicola Dudley n. var. Tree 8-12 m. high, with 

 dark, rough hark ; leaves green on both surfaces, glabrate, nar- 

 rowly lanceolate, 5-12 cm. long, 8-12 mm. wide, closely serrulate, 

 acute or acuminate, narrowed at base to petioles 4-6 mm. long, 

 which are quite puberulent or nearly glabrous at maturity ; stip- 

 ules lanceolate when well developed, the larger 8-10 mm. long, 

 all glandular toothed, often with similar glands on the lower sur- 

 face and on the serratures of the young leaves ; aments expand- 

 ing with the leaves, terminating the short lateral branches, the 

 starninate 3-6 cm., the pistillate 2.5-5 cm. long; stamens 5-11, 

 their filaments tomentose below ; bracts pale, obovate or round- 

 ish, usually very tomentose; style short; stigmas 2, lobed ; 

 capsule ovoid, glabrous or more or less pubescent, mostly 4-5 mm. 

 long, from slightly longer to twice the length of the smooth 

 pedicels. 



The largest willow in southern California. Frequent along the Santa Ana 

 River from Santa Ana to San Bernardino; also along the San Dieguito and 

 San Diego Rivers in San Diego County. The type of this heretofore unde- 

 scribed willow is the author's no. 3256, collected along the Santa Ana 

 River near Orange. 



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

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

 ing 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; sta- 

 mens 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 Cahu- 

 enga Pass. A form with smaller leaves and aments is apparently 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 



