62 SALICACEAE 



Leaves usually long-acuminate, serrate. 26. S. lutea. 



Leaves acute or rarely short-acuminate, entire or indistinctly crenulate. 



27. S. Walsonii. 

 Capsule short-stipitate or subsessile; stipe in fruit less than 1.5 mm. long and much 

 shorter than the bractlets; style 0.5-1 mm. long. 

 Leaves more or less dentate, rarely subentire. 



Young leaves and twigs rather densely pubescent with long white hairs; 

 the former glandular-denticulate or dentate. 

 Bractlets fuscous. 28. S. Barklayi. 



Bractlets yellowish or Light brown. 29. S. commulata. 



Young leaves glabrous or sUghtly pubescent. 



Capsules 7-8 mm. long; leaf-blades broadly ovate or obovate, glandular- 

 dentate. 30. S. Tweedyi. 

 Capsule 4-6 mm. long; leaf-blades narrowly obo.vate to lanceolate. 

 Leaves dark green above, not reticulate. 



Leaves blackening in drying, finely glandular-dentate. 



31. S. conjuncta. 

 Leaves not blackening in drying. 



Leaves thin, ovate, elliptic, or obovate, Ught green and dull 



above; capsule ovoid. 32. S. padophylla. 



Leaves thick, firm, sliining above; capsule lance-ovoid. 

 Style 0.5-1 mm. long; aments on short leafy branches, 



2-3 cm. long. 33. ,S. monticola. 



Style 1-1.5 mm. long; aments subsessile, 3-4 cm long. 



34. S. curliflora. 

 Leaves yellowish green, conspicuously reticulate, thin. 



Leaves acute or acuminate, serrate. 35. S. pseudomyrsiniles. 



Leaves obtuse or rounded at the ape.x, crenate. 



36. S. myrtillifolia 

 Leaves entire, linear, lanceolate, oblanceolate, or oblong; aments subsessile. 

 naked. 

 Leaves permanently silky; a low shrub. 37. 5. Wolfii. 



Leaves glabrous in age; tree or tall shrub. 20. S. lasiolepis. 



Branches with a bloom, ptirple. 38. S. irrorata. 



VI. Retus.\e. 

 One species. 39. S. Dodgeana. 



VII. ROSTRAT.\E. 



Leaves Unear to lanceolate or oblanceolate. 



Leaves sharply serrate, narrowly lanceolate, 5-10 cm. long. 40. S. petiolaris. 

 Leaves entire or nearly so, linear, less than 5 cm. long. 



Leaves more or less silky, oblanceolate; branches purplish, usually with a bloom. 



41. S. Geyeriana. 

 Leaves not silky, Unear; branches without a bloom. 42. S. gracilis. 



Leaves ovate to obovate or broadly oblanceolate. 



Bracts fuscous, obovate or cuneate. 43. S. discolor. 



Bracts yellow, hnear-oblong or lanceolate. 



Mature leaves tliin, glabrous. 44. S. perroslrala. 



Matiu"e leaves firm, pubescent or tomentose beneath. 45. 5'. Bebbiana. 



VIII. Capreae. 



Capsule 8-10 mm. long; at least the staminate aments not leafy-bracted. 



Leaves obovate, entire or nearly so, densely silky and fulvous, almost velutinous when 

 young, in age glabrate above; bractlets fuscous, obovate. 



46. S. Scouleriana. 

 Leaves oblanceolate, closely and finely serrulate, puberulent when young ; bractlets 



yellow, oblong. 67. S. MacCalliana. 



Capsule 6 mm. long or less; aments leafy-bracted. 



Bractlets black, thinly pilose; style about 1 mm. long; leaves glabrate in age. 



47. .S. Lemmoni. 

 Bractlets brownish, villous; style about 0.5 mm. long; leaves silvery-silky beneath. 



54. 5. argyrocarpa. 



IX. Argentea. 

 Aments more than 1 cm. broad ; ovary over 5 mm. long. 



Leaves obovate, ovate, or broadly oblanceolate. 



Bractlets obovate, fuscous; leaves usually obovate. 



Twigs wliite- villous ; leaf-blades entire. 48. S. alaxensis. 



Twigs puberulent; leaf-blades usually glandular-denticulate. 



49. 5. Barratliana- 

 Bractlets oblong, yellow; leaf-blades usually broadly oblanceolate. 



63. S. Seemannii. 

 Leaves oblanceolate or oblong-lanceolate; bractlets oblong. 



Leaves silvery-silky beneath, not strongly reticulate; bractlets black. 



50. S. bella. 

 Leaves white-tomentose beneath, strongly reticulate; bractlets brown. 



51. S. Candida. 

 Aments less than 1 cm. broad; ovary less than 5 mm. long. 



Leaves broadly obovate. 



Twigs puberulent; bractlets light brown; stamen 1. 52. S. sitchensis. 



Twigs glabrous; bractlets blackish; stamens 2. 53. S. Drummondiana. 



Leaves oblong, lanceolate, or oblanceolate. 



