308 WILLOW FAMILY. 



* # FhwiTS sKghthj earlier than the leaves but rather late in spring, on lateral 



calkins which have A or 5 leafy bracts at their base. 

 S. cordkta. A common wild species along streams, badly named, as the 

 leaves arc seldom heart-shaped at base and generally lanceolate, often tapering 

 to both ends, sharply serrate, smooth, pale or whitish beneath ; stipules on 

 young shoots conspicuous, ovate or kidney-shaped ; ovary slender-stalked, 

 tapering, smooth. 



* » * Flowers in /oosrcaikins terminating leafy lattral shoots of the season, there- 



fore later than tite leaves, in late spring or early summer. 



S. Idngif61ia, Long-leaved W. Wild on river-banks N. : low shrub or 

 low tree, with very long lance-linear nearly sessile sparsely denticulate leaves 

 grayish-hairy when young ; catkins with narrow yellowish scales ; the stalked 

 silky-downy ovary bearing large stigmas. 



S. Babylonica, Weeping W. Planted from the Orient : a familiar tree, 

 with very slender drooping branches, and linear-lanceolate leaves white beneath; 

 in the monstrous variety called annulXeis, Hoop W., curved into a ring. 



S. &Iba, White W., commonly the var. vitell5:na, with yellow twig*s: 

 planted from Eu. ; a familiar tree; leaves lanceolate, senate, white-silky under- 

 neath ; stipules lanceolate ; ovary nearly sessile and smooth. 



S. fragilis. Brittle W., from Eu. (so called because the twigs, used for 

 basket-work, &c., break off readily from their base, as in several other species) ; 

 large tree, with lanceolate taper-pointed leaves white but smootli beneath, half 

 heart-shaped stipules, and nearly sessile smooth ovary. 



§ 3. Stamtns 3 - 5 or more, separate : catkins late-fowering, terminating leafy 

 branches of the season as in the preceding species : stamens hairy : ovary 

 smooth : scales deciduous : leaves serrate, smooth. . 



S. nigra, Black W. Low river-banks : wild tree, with rough black bark, 

 narrow-lanceolate taper-pointed leaves, 3-6 stamens, and short-ovate pods. 



S.pentSiIldra, Bay W. A handsome tree, planted from Eu. for the deep 

 green very glossy lanceolate taper-pointed leaves, of the same hue both sides, 

 the large staminate catkins of golden yellow flowers also handsome : stamens 

 4-12, commonly 5 ; pods tapering. 



S. lilcida, Amkeican Bay W. , Wild in wet ground N : very like the 

 last, but a shrub, with shorter catkins on a less leafy short branch. 



2. P6PUIiUS, POPLAR, ASPEN, (Classical Latin name.) El. spring. 



§ 1. Buds not glutinous : leaves cottony, at least beneath, even when old. 



P. 41ba, Abelb or White P. Tree planted from Eu., with spreading 

 branches, roundish slightly heart-shaped wavy-toothed or lobed leaves soou 

 green above, vpry white-cottony beneath : spreads inveterately by the root. 



§ 2. 3uda not glutinous : leaves cottony when developed, but soon smooth and 

 green both sides :■ bark smooth and close, greenish-white. 



P. tremuloldes, American Aspen. Small tree, common in woods N. ; 

 with small roundish-heart-shaped leaves beset with small regular teeth ; scales 

 of the catkin put into 3 or 4 Jinear lobes, fringed with long hairs. 



P. grandideutdita, Larger American Aspen. Middle-sized tree, com- 

 mon in woods : the larger roundish-ovate leaves with coarse and irregular blunt 

 teeth; scales unequally 5-6-eleft, slightly fringed. 



P. heterophylla, Downy PoPLAR^ Wet grounds, common only W. & 

 S. : tree 400-60° high; leaves round-ovate or heart-shaped with the sinus 

 closed by the overlapping lobes, obtuse, serrate with incurved teeth, 3' -5' long, 

 white wool deciduous only with age, leaving traces on the veins beneath and on 

 the petioles ; fruiting catkins smooth. 



§ 3. Buds glutinous with aromatic resin or balsam: leaves smooth from thefrst, 

 P. dilat&ta, Lombard y P. Stiff spiry trce, with closely appressed branches, 



BTid small broadly triangular pointed leaves, formerly much planted, from ths 



Old World, — thought to be a remarkable state of 



