GENUS 2. 



WILLOW FAMILY. 



60 1 



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. 



Salix Uva-ursi Pursh, Fl. Am. Sept. 610. 1814. 



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



A depressed or prostrate glabrous shrub, the 

 terete brown branches 6'-i2 r 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"-$" wide, 

 prominently veined, deep green and shining above, 

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

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

 pistillate i'-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. Herb- 

 like Willow. Fig. 1478. 



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



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"-^." long; aments termi- 

 nating 2-leaved branchlets, 4-10- 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. 



