SALICINE^E. (WILLOW FAMILY.) 335 



closely glandular-serrate ; stipules small, roundish ; petioles glandular at the 

 tip : starninate aments densely flowered, oblong-cylindrical, 1 to 2 inches long* 

 obtuse ; fertile rather shorter, erect or spreading, in fruit thick; scales dentate, 

 hairy at base, in the female ament almost glabrous : stamens 5 or more : cap- 

 sules tapering from an ovate base : style short ; stigmas bifid. Banks of 

 mountain streams, frequent. Scarcely distinguished from S- lucida of the 

 Eastern States by the narrower and less glossy leaves. 



# * Stamens 2 : capsules tomentose or glabrous : leaves linear, remotely mucro- 



nate-dentate. 



3. S. longifolia, Muhl. Leaves varying from linear to lanceolate, long 

 acuminate, tapering at base, sessile or nearly so, 2 to 4 inches long, 1 to 6 lines 

 (usually 2 to 3 lines) wide, margin remotely denticulate with projecting teeth 

 or sometimes entire ; stipules very early deciduous : aments linear-cylindrical, 

 often clustered at the extremity of the branchlets : scales villous, dentate, 

 subdeciduous : capsules oblong-conical, obtuse, shortly pedicelled, tomentose 

 or glabrous : stigmas large, sessile. From Maine and Maryland across the 

 continent to Oregon and California. Exceedingly variable in foliage, flowers, 

 and fruit. A shrub (within our limits) rooting extensively in alluvial deposits 

 and forming dense clumps. 



2. Aments lateral or terminal with or without bracts: scales persistent, usually 



darker at the tip : stamens 2 , filaments glabrous. 



# Capsules glabrous. 



4. S. COrdata, Muhl. Leaves linear- or oblong-lanceolate, acuminate, 

 glandular-serrate, glabrous (usually more or less silky when young) ; those 

 of vigorous barren shoots broadly-lanceolate, rounded or subcordate at base, 

 3 to 4 inches long, 1 to l inches wide, rigid, paler and reticulate-veined be- 

 neath, coarsely serrate, conspicuous stipules ovate or reniform ; those of 

 depauperate growths linear-lanceolate, taper-pointed at both ends, 2 inches 

 long by j inch wide, very finely and closely serrate, scarcely paler beneath, 

 stipules minute : aments more or less bracted, cylindrical, 1 to 3 inches long 

 in fruit : scales dark at the tip, clothed with long white hairs : capsule lanceo- 

 late, glabrous, green or reddish, long pedicelled : style medium ; stigmas 

 notched. 



Var. Mackenziaua, Hook. Leaves obovate-lanceolate, narrowed at 

 base, subentire ; stipules small : aments shortly peduncled ; pedicels long and 

 slender, much exceeding the small, sparsely villous tawny scale. 



Var. vestita, Anders. Recent twigs tomentose ; young leaves silky : 

 aments thick, closely sessile, preceding the leaves : scales clothed with long 

 silky hairs. 



Northern States clear across the continent and northward to the Arctic 

 coast. The var. vestita, growing on the banks of the Missouri and Yellow- 

 stone Rivers, L. F. Ward, known as " Diamond Willow " from the peculiar 

 arrest of wood- growth at the base of the atrophied twigs, is said to afford 

 very durable timber. It is altogether incredible, however, that any form of 

 S. cordata ever attains tree-like size. 



5. S. Novse-Anglise, Anders. Leaves obovate-oblong or oval, somewhat 

 obtuse, closely crenate, green and glabrous both sides, young drying black, adult 

 rigid, striate-nerved, shining ; stipules small or none : aments short, oval-oblong, 



