Trees of the Northern United States 117 



7. Salix alba L. White Willow. A large tree with 

 rough gra}' bark. Leaves lanceolate, narrowed at the base. 

 serrulate, silky-puhescent on both sides wdien young, less so 

 and pale and glaucous beneath wlien mature, 2-5 in. long, ]-] 

 in. wide; capsule ovoid, acute. In moist soil. Native of 

 Europe. The sul)species S. alba vitellina { L. ) Koch., has the 

 mature leaves glabrous and the twigs yellowish-green. N. S. 

 and Out. to N. C. and Iowa. 



8. Salix babylonica L. Weeping Willow. A large 

 graceful tree with weeping branches, often planted in yards 

 and cemeteries. Leaves linear-lanceolate, serrulate, narrowed 

 at the base, glabrous when mature, green above, paler beneath, 

 0-6' in. long, \-l in. wide ; capsule ovoid-conic. Native of Asia. 

 Conn, to Va. and Mich. 



9. Salix pyrifolia And. Balsam Willow. Usually a 

 shrub but sometimes arborescent with a slender erect stem. 



Leaves elliptic, ovate-oval, or obovate, thin, glabrous, acute 

 3' the apex, rounded or subcordate at the base, glaucous be- 

 neath, 2-3 m. long, 'l-ll in. wide, slightly crenulate-serrulate : 

 capsule very narrow, acute. Tn swamps. Newf. to B. C. south 

 to Me., Mich., and Minn. 



10. Calix cordata Muhl. Heartleaf Willow. A tree or 

 shrub with small, appressed scales on the thin bark. Leaves 

 lanceolate, or oblanceolate, acuminate, finely serrate with 

 minute gland-tipped teeth, rounded or narrowed at the base, 

 glabrous or nea'dy so when mature, pale beneath, '2^--^ in. 

 long, .]-l in. wide; capsule .ovoid. Wood dark ])rown. On 

 river l)anks and in moist places. N. B. to B. C, Va., Mo., 

 Col, and Cal. 



11. Salix viminalis L. Osier Willow. A small slen- 

 der tree or shrulj with green twigs. Leaves long linear- 

 lanceolate, sparingly, repand-crenulate or entire, revolute- 

 margined, short-petioled, gla1)rous above, silvery-silky beneath. 

 3-() in. long; ca])sule narrowly ovoid-conic, acute. Cultivated 

 for wicker-ware. Native of Europe and .\sia. Newf. to Penn. 



12. Salix bebbiana Sarg. r.ebh Willow.. A slirub cr 

 small tree. Leaves elliptic, oblong, or ohlong-lanceolate, spar- 

 ingly serrate or entire, dull green and puberulent above, pale 

 and tomentose beneath, nearly glabrous when very old ; cap- 

 sule very narrowly long-conic, twice as long as the filiform 



