31 8 FLORA. 



32. Salix tristis Ait. Dwarf Gray Willow. Sage Willow. (I. F. f. 

 1 186.) A tufted, slender shrub, 3-6 dm. tall, the twigs terete, puberulent, the 

 roots long and thick. Leaves oblanceolate or linear-oblong, acute or obtusish, some- 

 what undulate, green and puberulent or glabrous above, crowded, 2-5 cm. long, 

 their margins revolute; petioles about 2 mm. long; stipules minute, deciduous; 

 aments expanding much before the leaves, dense, very small, sessile; bracts per- 

 sistent; stigmas sessile or nearly so; capsule ovoid with a long, slender beak, tomen- 

 tulose, about 6 mm. long. In dry soil, N. S. (?), Me. to Minn., south to Fla. and 

 Tenn. March-April. 



33. Salix Candida Fluegge. Hoary Willow. (I. F. f. 1193.) An erect 

 shrub, 6-15 dm. tall, the older twigs red or purple and terete, the younger densely 

 white-tomentose. Leaves green and loosely tomentose or becoming glabrate above 

 when mature, oblong or oblong-lanceolate, thick, sparingly repand-denticulate or 

 entire, acute at both ends or the lower obtuse at the apex, 5-10 cm. long, 6-16 mm. 

 wide, their margins slightly revolute; petioles 3-4 mm. long; stipules lanceolate- 

 subulate, about equalling the petioles, deciduous; aments expanding before the 

 leaves, dense, cylindric, the staminate about 2.5 cm. long, the pistillate 3-5 cm. 

 long in fruit; bracts villous, persistent; capsule ovoid-conic, acute, 5-6 mm. long. 

 In bogs, Lab. to N. W. Terr., south to N. J., Iowa and Mont. Hybridizes with S. 

 petiolaris and S. cor data. May. 



34. Salix sericea Marsh. Silky Willow. (I. F. f. 1188.) A shrub, 2-4 m. 

 tall, with slender purplish puberulent twigs, the young leaves densely silky-pubes- 

 cent. Mature leaves glabrous or nearly so, lanceolate, acuminate, narrowed or 

 obtuse at the base, serrulate all around with gland-tipped teeth, dark green above, 

 paler and somewhat glaucous beneath, turning brown or black in drying, 6-10 cm. 

 long, 1-2 cm. wide; stipules narrow, deciduous; petioles 4-14 mm. long, sometimes 

 glandular; aments expanding before the leaves, sessile, usually with a few leafy 

 bracts at the base, dense, the staminate about 2 cm. long, the pistillate 2-4 cm. long 

 in fruit; bracts villous, persistent; capsule ovoid-oblong, obtuse, pubescent, about 4 

 mm. long. In swamps and along streams, Me. to Mich, and Va. May. 



Salix sericea subsericea (Anders.) Rydb. Leaves less silky, more sharply serrate; 

 capsule smaller. N. Y. to Mich. (S. petiolaris stibsericea Anders.). 



35. Salix argyrocarpa Anders. Silver Willow. (I. F. f. 1190.) An erect 

 or diffuse shrub, 1.5-6 dm. 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 alx>ve, persistently silvery-silky 

 beneath, 3-5 cm. long, 6-12 mm. wide, the margins slightly revolute; aments un- 

 folding with the leaves, leafy-bracted at the base, dense, 2.5 cm. or less long; scales 

 persistent, villous; capsule oblong-conic, acute, 2-3 mm. long, about twice as long 

 as its pedicel. Lab. and Quebec to the White Mountains of N. H. Hybridizes 

 with 5*. chlorophylla. June-July. 



36. Salix viminalis L. Osier Willow. (I. F. f. 1194.) A small slender 

 tree or shrub, with terete green twigs. Leaves sparingly repand-crenulate or 

 entire, revolute-margined, short-petioled, dark green and glabrous above, persist- 

 ently silvery-silky beneath, 7-15 cm. long, 4- 16 mm. wide; stipules narrow, 

 deciduous; aments expanding before the leaves, dense, the pistillate 5-7 cm. long 

 and I cm. in diameter in fruit; capsule narrowly ovoid-conic, acute, about 6 mm. 

 long. Cultivated for wickerware and occasionally escaped into wet places in the 

 Eastern and Middle States. Native of Europe and Asia. April-May. 



37. Salix chlorophylla Anders. Tea-leaved Willow. (I. F. f. 1195.) 

 A -hrub, 3-30 dm. high, much branched, the twigs glabrous, dark purple-green, 

 sometimes glaucous. Leaves oblong, lanceolate or elliptic, acute or obtuse at the 

 apex, minutely repand-crenulate or entire, narrowed at the base, bright green and 

 shining above, pile and glaucous beneath, 3-7 cm. long, 1-2 cm. wide; petioles 

 6-16 mm. long; stipules minute, fugacious, or wanting; aments sessile, dense, 

 oblong-cylindric, the stamin;\te 2 cm. or less long, the pistillate 2-5 cm. long in 

 fruit; bracts rillous, persistent; cap-ule conic-, acute. 5 mm. long. Swamps, Lab. 

 to Br. Col., and tin- White Mountains of N. H., and Colo. Summer. [S. phylli- 

 cifolia Bebb, not L.] 



38. Salix Groenlandica (Anders) Lundst. Greenland Willow. Alow 



