328 



SALICACEAE (WILLOW FAMILY) 



i. phylicifolia. 

 Leaf x 1/3 

 Fruit x 6 



= = Leaves glabrous, or the youngest occasionally with arachnoid hairs. 



30. S, phylicif61ia L. Leaves elliptic-lanceolate to oblong, somewhat equally 

 pointed or obtuse at both ends, remotely and minutely repand- 

 toothed, 2.5-7 cm. long, very smooth on both sides, dark green 

 and shining above, glaucous beneath, at length coriaceous ; 

 stipules obsolete ; aments sessile with a few small bracts at 

 base, 1.5-3 cm. long, rather densely flowered, short-cylindric, 

 the fertile becoming in fruit somewhat stalked, 3.5-4.5 cm. 

 long ; scales dark, silky-villous ; capsule conic-rostrate from 

 an ovoid base ; stigmas bifid or entire, yellow, drying black. 

 (/&'. chlorophylla Anders.) Lab. to Alaska, s. to alpine dis- 

 tricts of Que., Me., N. H., and Vt. A divaricately much 

 branched shrub 0.5-3 m. high ; twigs glabrous, purplish, some- 

 times covered with a glaucous bloom. (Eu.) FIG. 668. 



* * Hairy filaments and often the reddish anthers 

 united so as to appear as one. 



31. S. PURptiREA L. (PURPLE W.) Leaves oblance- 

 olate or tongue-shaped, slightly serrulate, very 

 smooth, glaucescent, subopposite ; stipules obsolete ; 

 aments densely ilowered, narrow-cylindrical, the 

 sterile at least closely sessile, with only very small bracts at base ; 

 scales small, round, crisp-villous, tipped with dark purple ; capsules 

 grayish-tomentose, ovoid-conical, obtuse, sessile, 2-3 mm. long. 

 Low grounds ; originally cultivated for basket rods ; now established. 

 (Nat. from Eu.) FIG. 669. purpurea. 



2. P6PULUS [Tourn.] L. POPLAR. ASPEN 



Flowers from a cup-shaped disk which is obliquely lengthened in front. Sta- 

 mens 8-30, or more ; filaments distinct. Stigmas 2-4. Capsules 2-4-valved. 

 Trees, with broad and more or less heart-shaped or ovate toothed leaves, and 

 often angular branches. Buds scaly, covered with resinous varnish. Catkins 

 long and drooping, appearing before the leaves. (The classical Latin name, of 

 uncertain origin.) 



1. Styles 2, with 2-3 narrow or filiform lobes; capsules thin, slender-conical, 

 2-valved, small, on very short pedicels; scales silky ; stamens 6-20; leaves 

 ovate, on laterally flattened petioles ; terminal buds small, slightly glutinous. 



1. P. ALBA L. (WHITE P., SILVER-LEAVED P., ABELE.) The younger 

 branches and the under surface of the rhombic-oval sinuate-toothed acute 

 leaves white tomentose ; scales crenate, fringed. Frequently cultivated for 

 shade, spreading widely by the root, and occasionally spontaneous. (Introd. 

 from Eu.) 



2. P. tremuloides Michx. (AMERICAN A.) Tree 6-20 m. high, with smooth 

 greenish-white bark ; bud-scales glabrous or merely ciliate ; leaves roundish- 

 heart-shaped, with a short sharp point, and small somewhat regular teeth, smooth 

 on both sides, with serrulate margins, downy when young, on long slender peti- 

 oles ; scales cut into 3-4 deep linear divisions, fringed with long hairs. Light 

 soils, Lab. to Alaska, s. to Pa., Mo., etc. 



3. P. grandidentata Michx. (LARGE-TOOTHED A.) Tree often 20 m. high, 

 with smoothish gray bark; bud-scales tomentose; leaves roundish-ovate, with 

 large and irregular sinuate teeth, when young densely covered with white silky 

 wool, at length smooth both sides ; scales cut into 5-6 unequal small divisions, 

 slightly fringed. Rich woods and borders of streams, N. S. to the mts. of N. C., 

 w. to Ont., Minn., and la. 



2. Styles 2-4, with dilated lobes; capsules large, often thick, subglobose to 

 ellipsoid, 2-4-valved; scales mostly glabrous; terminal buds large and 

 very glutinous. 



