400 WILLOW FAMILY. 



many other ornamental willows are grafted. Moderate-sized tree, with 

 brown or reddish branches and thick oval or lance-oval wavy-margined 

 and irregularly toothed leaves, which are white-tomentose below and 

 short-stalked ; young growth pubescent. 



* * 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, Muhl. 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. Variable. 



S. incana, Schrank. (S. ROSsiARiNirdLiA of horticulturists.) Leaves 

 long-linear, with somewhat revolute entire edges, white-cottony below, 

 nearly sessile, dull-green above; catkins small and slender; young 

 growth more or less cottony. Cult, for ornament, usually as a graft 

 upon some other species. 



* * * Flowers in loose catkins terminating leafy lateral shoots of the 

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



t- Leaves remotely denticulate; stamens 2 ; capsule glabrous or silky. 



S. Iongif6lia, Muhl. LONG-LEAVED W. Banks N. ; shrub, with very- 

 long lance-linear, nearly sessile leaves, grayish-hairy when young ; catkins 

 with narrow yellowish scales ; the stalked ovary bearing large stigmas. 



f- -- Leaves closely serrate with inflexed teeth ; copsule glabrous. 

 + Stamens generally 2 ; leaves lanceolate and long-acuminate. 



S. frdgilis, Linn. CRACK W. Leaves green and glabrous, pale or 

 glaucous beneath, 3'-6' long ; stipules (if present) half-cordate ; capsule 

 long-conical, short-stalked. Tall tree, planted for shade and ornament. Eu. 



S. 6lba, Linn. WHITE W. Leaves ashy-gray or silky-white on both 

 sides except when old, 2'-4' long ; stipules ovate-lanceolate, deciduous ; 

 capsule ovate-conical, nearly or quite sessile. Eu. Very variable and 

 much mixed with S. fragilis. Forms with yellow twigs (var. VITELLINA) 

 are cultivated. Var. ARGENTEA, with very silver-gray foliage, is the S. 

 REGALIS of horticulturists. 



S. Babyldnica, Tourn. 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 ANNULARIS, HOOP 

 W. , the leaves are curved into a ring. 



*+ -w- Stamens 3 or more ; leaves often broader. 



S. nigra. Marsh. BLACK' W. River banks; 15-50 ; bark rough; 

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



S. pentdndra, Linn. (S. LAURir6LiA of horticulturists.) BAT W. Hand- 

 some tree, planted from Eu. for the very glossy, lanceolate, taper-pointed 

 leaves, of the same hue on both sides, the staminate catkins of golden- 

 yellow flowers also handsome ; stamens commonly 5 ; pods tapering. 



8. lucida. Muhl. AMERICAN BAT W. Grows in wet ground N.; like 

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



2. FOPULUS, POPLAR, ASPEN. (Classical name.) Quick-grow- 

 ing, soft-wooded trees, mostly with glossy dangling leaves. 

 * BALSAM POPLARS, with more or less elongated resinous sticky buds. 

 -- Petioles terete or not prominently flattened. 



P. balsamifera. Linn. BALSAM POPLAR, TACAMAHAC. A tall upright 

 tree, with a narrow straight top, growing in woods and along streams in 



