Salix. SALICACE.E. gg 



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. sessimfolia. 



Leaves h inch long, yew-like : anients short and thick. 6. S. 'I'Axifolia. 



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



Staminate araents 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. CoULTERi. 



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. Geyeuiana. 



Style evident. 



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



myrtle-like. 18. S. Monica. 



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



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



Anients oblong or cylindrical : capsules more or less pedicelled. 

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

 sules shortly pedicelled. 

 Leaves entire. 

 Leaves glandular-serrulate. 

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

 celled. 

 Leaves green above, densely silky-pubescent beneath. 

 Leaves soon glabrate or scarcely pul)pscent beneath. 

 Aments preceding the leaves, sessile. 

 Aments produced with the leaves, more or less peduncled. 



§ 1. Stamens 3 to 5 : scales yellowish, falling before the viaturity 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 liairs r 

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

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

 xvi.*"'. 200. 



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

 Clear hake {Bolander) ; "Sacramento Valley," AVilkes'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 | to H 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-peibincled, elongated, flexuose, 2 to 4 

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



