Salix. SALICACJELE. 83 



Shrubs. Stamens 2 : scales pale ; those of fruiting ament subdeciduous. 

 Leaves 1 to 3 or 4 inches long. 



Stigmas very short, thick : leaves smooth or silky. 4. S. LONGIFOLIA. 



Stigmas bifid, with linear lobes : leaves hoary-pubescent. 5. S. SESSILIFOLIA. 



Leaves- \ inch long, yew-like : aments short and thick. 6. S. TAXIFOLIA. 



Dwarf creeping alpine shrub : scales dark, persistent. 17. S. ARCTICA. 



Staminate aments sessile or nearly so; pistillate sessile or on short peduncles, 



with or without bracts, the scales persistent. 

 Stamens solitary : scales densely villous : leaves rigid, persistent, densely 



tomentose beneath. 19. S. CoULTERl. 



Stamens 2 to each usually dark colored scale. 

 Capsules glabrous. 



Shrub. Leaves finely serrate, soon smooth, paler beneath. 7. S. CORDATA. 



Tree or shrub. Leaves unequally subserrate, pubescent, rusty- 

 glaucous beneath. 8. S. LASIOLEPIS. 

 Capsules tomentose, sometimes glabrous in n. 16. 

 Style none. 



Aments oblong, sessile, appearing before the wedge-obovate leaves. 9. S. FLAVESCENS. 

 Aments roundish, peduncled, appearing with the silky lanceolate 



leaves. 10. S. GEYERIANA. 



Style evident. 

 Ameuts small, roundish : capsules sessile, 1 line long : leaves 



myrtle-like. 18. S. MONICA. 



Aments elongated -cylindrical : capsxiles sessile, 2 lines long : leaves 



narrow, sage-like. 14. S. BREWERI. 



Aments oblong or cylindrical : capsules more or less pedicelled. 

 . Alpine shrubs, 4-6 feet high . branches short and stout : cap- 

 sules shortly pedicelled. 



Leaves entire. 15. S. GLAUCA. 



Leaves glandular-serrulate. 16. S. CALIFORNICA. 



Large shrubs, 6-15 feet high : branches slender : capsules pedi- 

 celled. 



Leaves green above, densely silky-pubescent beneath. 11. S. SlTCHENSls. 



Leaves soon glabrate or scarcely pubescent beneath. 



Aments preceding the leaves, sessile. 13. S. AUSTINS. 



Aments produced with the leaves, more or less peduncled. 12. S. LEMMONI. 



1. Stamens 3 to 5 : scales yellowish, falling before the maturity of the fertile 

 ament : filaments hairy below. Trees. 



* Petioles not glandular. 



1 . S. nigra, Marsh. Trunk slender, often crooked or leaning, with rough dark 

 bark, branches brittle at base ; leaves linear-lanceolate, tapering from near the acute 

 base to an extremely long point, often falcate, 4 to 6 inches long, 3 or 4 lines wide, 

 closely serrate, smooth and green on both sides, the midrib prominent ; stipules 

 semicordate, often wanting : aments with leafy peduncles, elongated, the fertile be- 

 coming rather lax : scales entire or only slightly dentate, villous with crisp hairs : 

 capsules ovate-conical, glabrous, brownish-tawny, more or less pedicelled : styles very 

 short; stigmas slightly notched. Anders. Sal. Monogr. 19, fig. 15, and DC. Prodr. 

 xvi. 2 . 200. 



Growing on the banks of streams and lakes, and bending over the water. Cache Creek, near 

 Clear Lake (Bolander) ; "Sacramento Valley," Wilkes's Exploring Expedition (n. 1234) ; Fort 

 Mohave, Cooper. Collected by Fremont in Utah and by Wright in New Mexico ; not before re- 

 corded from west of the Sierra Nevada. Everywhere common between the Gulf of Mexico and 

 the Great Lakes. 



2. S. laevigata, Bebb. Leaves lanceolate or oblong-lanceolate, acute or acumi- 

 nate, 3 to 7 inches long and f to 1^ inches wide, the earliest obovate with a mucro- 

 nate point, glabrous, dark green, glossy and prominently nerved above, paler or 

 glaucous beneath, minutely serrulate : petioles downy, not glandular ; stipules semi- 

 cordate, usually small or none : aments leafy-peduncled, elongated, flexuose, 2 to 4 

 inches long, rather densely flowered : scales pallid, villous, dentate ; in the male 



