308 WILLOW FAMILY. 



# # Flowers slightly earlier than the leaves but rather late in spring, on lateral 



catkins which have 4 or 5 leafy bracts at their base. 



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

 leaves are 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 loose catkins terminating leafy lateral shoot* of the season, there- 



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



S. Iongif61ia, 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 ANNUL\RIS, HOOP W., curved into a ring. 



S. alba, WHITE W., commonly the var. VITELLINA, with yellow twigs : 

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

 neath ; stipules lanceolate ; ovary nearly sessile and smooth. 



S. fragilis, BHITTLE 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 smooth beneath, half 

 heart-shaped stipules, and nearly sessile smooth ovary. 



3. Stamens 3-5 or more, separate: catkins later/lowering, 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. pentandra, 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. liicida, AMERICAN BAY W. Wild in wet ground N : very like the 

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



2. P6PULUS, POPLAR, ASPEN. (Classical Latin name.) Fl. spring. 

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



P. alba, ABELE or WHITE P. Tree planted from Eu., with spreading 

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

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



2. Buds not glutinous : leaves cottony when developed, but soon smooth and 

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



P. tremuloides, AMERICAN ASPEN. Small tree, common in woods N. ; 

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

 of the catkin cut into 3 or 4 linear lobes, fringed with long hairs. 



P. grandidentata, LARGKK AMERICAN ASPEN. Middle-sized tree, com- 

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

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



P. heterophylia, DOWNY POPLAR. Wet grounds, common only W. & 

 S. : tree 40 -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 the first. 



P. dilatata, LOMBARDY P. Stiff spiry tree, with closely appressed branches, 

 and small broadly triangular pointed leaves, formerly much planted, from the 

 Old World, thought to be a remarkable state of 



