GENUS 2. 



WILLOW FAMILY. 



601 



26. Salix obtusata Fernald. Blunt-leaved 

 Willow. Fig. 1476. 



Salix obtusata Fernald, Rhodora 9: 223. 1907. 



A shrub ii-3 high, with smooth brown shining 

 twigs. Leaves oblong to oblong-orbicular, thin, 

 rounded at the apex, obtuse or subcordate at the 

 base, I '-2' long, ii' wide or less, closely dentate, 

 somewhat pubescent beneath when young, glabrous 

 when mature, the petioles 3 "-6" long, slender, the 

 small cordate stipules persistent ; aments sessile, 

 borne on twigs of the previous season, the pistillate 

 10" long or less, 3 "-4" thick; bracts obovate, obtuse, 

 villous ; capsule conic, glabrous, about ii" long; 

 gland very short; style not longer than the stigmas. 



Gravelly shores, Quebec. Summer. 



27. Salix Uva-ursi Pursh. Bearberry Willow. Fig. 1477. 



Sali.v Uva-ursi Pursh, Fl. Am. Sept. 610. 1814. 



Salix Cntleri Tuckerm. Am. Journ. Sci. 45 : 36. 1843. 



A depressed or prostrate glabrous shrub, the 

 terete brown branches 6'-i2 x long, diffuse from a 

 deep central root. Leaves obovate or elliptic, ob- 

 tuse or acute at the apex, narrowed at the base, 

 crenulate-denticulate, 4"-io" long, 2"-5" wide, 

 prominently veined, deep green and shining above, 

 pale beneath; petioles i"-2" long; aments on short 

 leafy branches, dense, about \' long in flower, the 

 pistillate 1-2' long in fruit; bracts persistent, obo- 

 vate, obtuse, densely silky; stamens usually solitary, 

 rarely 2; filaments glabrous; style short; capsule 

 ovoid-conic, acute, glabrous, very short-pedicelled. 



Labrador and Hudson Bay to Alaska, south to the 

 summits of the mountains of New York and New Eng- 

 land. May-June. 



Salix myrtillifolia Anders., of high boreal regions, 

 differs in having nearly erect branches and larger 

 leaves. 



28. Salix herbacea L. Dwarf Willow, 

 like Willow. Fig. 1478. 



Salix herbacea L. Sp. PI. 1018. 1753. 



Herb- 



A depressed matted shrub, with very slender angled 

 twigs i '-6' long, the youngest foliage somewhat pubes- 

 cent. Mature leaves glabrous, suborbicular, rounded or 

 retuse at the apex, cordate or rounded at the base, thin, 

 crenulate-denticulate all around, finely reticulate-veined, 

 bright green and shining on both sides, 5"-io" in diam- 

 eter; petioles very slender, 2" -4" long; aments termi- 

 nating 2-leaved branchlets, 4-io-flowered, 2"-^" long; 

 bracts obovate, obtuse, persistent, glabrous or nearly so; 

 stamens 2; filaments glabrous; style rather longer than 

 the 2-cleft stigmas; capsule narrowly conic, glabrous, 

 nearly sessile. 



Labrador and Quebec, through arctic America, and on the 

 White Mountains of New Hampshire and Mt. Katahdin, 

 Maine. Also in Europe and Asia. Summer. 



