Order 122.— SALICACEjE. 055 



2-lobed. — Banks of streams from tho Conn, to tho Mis3. An excellent osier, 

 with very long and slender twigs, long and narrow leaves. 



26 S. vitellina L. Yellow Willow. Golden Osier. Lvs. lanceolate, acu- 

 minate, with thickened serratures, smooth above, paler and somewhat silky be- 

 neath ; slip. ; aments cylindric ; scales ovate-lanceolate, pubescent outside ; ova. 

 sessile, ovate-lanceolate, smooth ; stig. subsessile, 2-lobed. — This willow was pro- 

 bably introduced, but is now very common by roadsides, &c. It is st tree of 

 moderate height, with shining yellow branches. May. 



(S. cerulea. Lvs. with a bluish hue, nearly or quite smooth beneath. — Oa 

 river banks. 



27 8. Babylonica L. Weeping Willow. (Fig. 47, a). Branches pendulous ; 

 lvs. lirtar-lanceolale, acuminate, smooth, glaucous beneath ; stip. roundish, oblujue, 

 acuminate; ova. sessile, ovate, smooth. — A largo tree of rapid growth and of a 

 most graceful and elegant form, cultivated until nearly naturalized. Only the $ 

 plant has yet been recognized in the U. S. § Eur. — /?. annularis, tho curled 

 willow, with the leaves regularly recurved into rings or coils, is a cultivated 

 variety. — Tho long, slender branchlets very naturally indicate tho English name 

 of the tree and give it a place in the church-yard to " weep" over the remains of 

 the departed. Tho Latin nam3 was happily suggested to Linnaeus by tho 137th 

 Psaim: 



"By tho rivers of Babylon there we sat down; 

 Yea, we wept, when wo remembered Zinn. 

 \Ve hanged our harps upon tho -willows in the midst thereof." 



2. POP'ULUS, Tourn. Poplar. Aspen. (Lat. popidus, the people ; 

 being often planted along the public ways.) Aments cylindric ; bracts 

 lacerately fringed ; calyx an oblique, disk-like cup, its margin cntiro; 

 $ Stamens 8 to 30. $ Ova. superior; style very short, bifid; stigma 

 large, 2-lobed ; capsule 2-valvcd, 2-celled. — Trees of large dimensions. 

 Wood soft and light. Buds varnished with a fragrant resin. Lvs. broad, 

 petioles long, often compressed vertically, and glandular. Aments lat- 

 eral, expanding before the lvs. 



* Branchlets winged or angular. Leaves ovate-cordate, acuminato Nos. 1, i 



* Branchlets terete, — Leaves ovate-orbicular, short acuminate No. A 



— Leaves ovate-orbicular, obtuse or acute : Nos. 4, 5 



— Leaves ovate, acuminate. Stamens 20 to 50 ? Nos. 6, T 



— Leaves deltoid, acuminate, smooth Nos. 8, 9 



— Leaves lobed, white-tomentous beneath No. 10 



1 P. angulata Ait. Water Poplar, Western Cotton Tree. Branches acutely 

 angular or winged; lvs. ovate-deltoid, subcordate, uncinate-serrate, acuminate, 

 glabrous, younger ones broadly cordate. — A trco of noble dimensions, growing 

 along tho rivers of the S. and W. States. Trunk 40 to 80f high, 1 to 3f diam., 

 bearing a broad summit, with coarse branches and branchlets. Lvs. on adufo 

 trees 2 to 3' long, about tho same width, truncato at base, on younger shoots 

 they are 2 or 3 times larger, with a cordate base. Petioles longer than the lvs. 

 Branchlets remarkably thick, greenish, spotted with white, striate. Buds short- 

 ovoid, green, not coated with resin. Timber not valuable. Mar., Apr. 



2 P. monilifera Ait. Neck-lace Poplar. Cotton-wood. Branchlets angular, 

 becoming terete; lvs. broadly deltoid-ovate, acuminate, serrate-dentate, 6mooth, 

 teeth incurved, ciliate, base nearly entire and subcordato ; scales of the amenfc 

 lacerate-fringed, not hairy ; stigmas 3 or 4, very large. — A largo tree, CO to 80f 

 high, in woods along rivers and lakes, Western Vt. to 111. and La. Trunk cylin- 

 dric, straight, 1 to 3f diam. Lvs. 2 to 4' long, conspicuously acuminate, nearly 

 as wide as long, on petioles of nearly equal length. Fertile aments recurved or 

 pendulous, at length 4 to 8' long and the capsules remote. Buds varnished as in 

 the other species. Apr. (P. laevigata Willd.) 



3 P. tremuloides Mi. American Aspen. Lvs. orbicular-cordate, abruptly 

 acuminate, dentate-serrate, pubescent at the margin; bracts of the ament 3 or 4- 

 cleft, margin silky-fringed. — Abundant in N. Eng. and in the Mid. States, growing 

 in woods and open lands. St. 25 to 40f in height, with a diam. of 8 to 12'. Bark 

 greenish, smooth, except on tho trunks of tho oldest trees. Lvs. small (2 to 2i' 



