328 



SALICACEAE (WILLOW FAMILY) 



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



30. S. phylicifblia 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. 

 {S. 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. 



* * Hairy filaments and often the reddish anthers 

 united so as to appear as one. 



31. S. PURPfjRE.v L. (Purple W.) Leaves oblance- 

 olate or tongue-shaped, slightly serrulate, very 

 smooth, glaucescent, subopposite ; stipules obsolete ; 

 aments densely flowered, 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-tonientose, ovoid-conical, obtuse, sessile, 2-3 mm. long. — 

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

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



668. 8. phylictfolla. 

 Leaf X % 

 Fruit X 6 



2. p6pULUS [Toum.] 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 narroio 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 orenate, 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 divisiotis, 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-i, with dilated lobes; capsules large, often thick, subglobose to 

 ellipsoid, 2-i^alved ; scales mostly glabrous; terminal buds large ani 

 very glutinous. 



