32. Salix Vestita Pursh. Hairy Willow

Fig. 1482

Salix vestita Pursh, Fl. Am. Sept. 610. 1814. Salix Fernaldii Blankenship, Mont. Agric. Coll. Stud. Bot. 1: 46. 1905.

A low shrub, similar to the preceding species, the twigs 4-sided, green. Leaves obovate, thick, mostly retuse or emarginate at the apex, slightly crenulate, narrowed or rounded at the base, dark green and glabrous above, persistently tomentose-silky beneath, short-petioled, 1-3' long; petioles 2"-4" long, channeled, not glandular; aments small, terminal, unfolding after the leaves, stalked; stamens 2; filaments distinct; capsules narrowly ovoid-conic, sessile, densely silky-tomentose, about 3" long.

Labrador and Quebec to British Columbia and Montana. June.

33. Salix Barclayi Anders. Barclay's Willow

Fig. 1483

S. Barclayi Anders. Ofv. Handl. Vet. Akad. 1858: 125. 1858. Salix Barclayi latiuscula Anders, in DC. Prodr. 16: Part 2,

255. 1868. Salix latiuscula Anders. Vet. Acad. Handl. 61: 165. 1867.

A low shrub, with dark brown glabrous twigs, the young shoots pubescent. Leaves obovate, oval, or oval-lanceolate, short-pointed at the apex, very minutely serrulate, floccose-pubescent when young, when mature glabrous, bright green above, pale beneath, 1'-2' long, 1/2'-l' wide; petioles 1"-2" long; stipules ovate, acute, deciduous; aments unfolding with the leaves, borne at the ends of short branches, dense, spreading or erect, the staminate 1' long, the pistillate 2'-3' long in fruit; bracts persistent, slightly villous; stamens 2; filaments distinct; capsule narrowly conic, tomentose or glabrous, acute, 3" long; style longer than the stigmas.

Newfoundland and Quebec. Northwestern arctic America. Summer.

34. Salix Argyrocarpa Anders. Silver Willow

Fig. 1484

S". argyrocarpa Anders. Mon. Sal. 107. f. 60. 1867.

An erect or diffuse shrub, 6'-2° high, the twigs dark green, nearly terete, shining. Leaves oblong or oblanceolate, acute at each end or the lower obtuse, short-petioled, entire or crenulate, bright green and glabrous above, persistently silvery-silky beneath, 1-2' long, 3"-6" wide, the margins slightly revolute; aments unfolding with the leaves, leafy at the base, dense, 1' or less long; bracts persistent, villous; stamens 2, distinct, their filaments glabrous; style slender, longer than the stigmas; capsule oblong-conic, densely silvery, acute, 1"-1 1/2" long, about twice as long as its pedicel.

. Labrador and Quebec to the mountains of Maine and New Hampshire. Hybridizes with S. phylici-folia. June-July.

35. Salix Arctica Pall. Arctic Willow. Ground Willow

Fig. 1485

Salix arctica Pall. Fl. Ross, 1: Part 2, 86. 1788.

A low branching shrub, rarely 6' high, the twigs terete or nearly so. Leaves glabrous, elliptic or broadly obovate, entire, obtuse and usually rounded at the apex, narrowed or rounded at the base, long-petioled, pale, glaucous and reticulate-veined beneath, 1-2' long, 1/2-1 1/2 wide, often darkening in drying; petioles slender, 1/2-1 1/2' long; aments borne at the ends of short leafy branches, very dense, the pistillate l'-2' long in fruit; bracts dark purple-brown, oblong to obovate, obtuse, white-villous, persistent; stamens 2; filaments glabrous; style filiform, longer than the stigmas; capsule conic, villous, very short-pedicelled.

Quebec; Arctic America and Asia. Summer.

Salix callicarpaea Trautv., of Labrador and recorded from Quebec, has broadly obovate leaves which do not darken in drying.