ORDER 122. SALICAO^. 655 



2-lobed. Banks of streams from the Conn, to the Miss. 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 ; stip. ; amenta 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 roads- les, &c. It is a tree of 

 moderate height, with shining yellow branches. Ma} . 



(3. CERULEA. Lvs. with a bluish hue, nearly or quite smooth beneath. On 

 river banks. 



27 S. Babylonica L. "WEEPING WILLOW. (Fig. 47, a). Branches pendulous; 

 Ivs. linear-lanceolate, acuminate, smooth, glaucous beneath ; stip. roundish, oblique, 

 acuminate; ova. sessile, ovate, smooth. A large 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. ;1. ANNULARIS, the curled 

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

 variety. The long, slender branchlets very naturally indicate the English name 

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

 the departed. The Latin name was happily suggested to Linnaeus by the 137th 

 Psalm; 



"By the rivers of Babylon there we sat down; 

 Yea, we wept, when we remembered Zion. 

 We hanged our harps upon the -icilloica in the midst thereof." 



2. POP'ULUS, Tourn. POPLAR. ASPEN. (Lat. populus, the people ; 

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

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

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

 large, 2-lobed ; capsule 2-valved, 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 Ivs. 



* Branchlets winded or angular. Leaves ovate-cordate, acuminate Xos. 1, 2 



* Branchlcts terete. Leaves ovate-orbicnlar, short acuminate No. r. 



Leaves ovate-orbicular, obtuse or acute Nos. 4, f 



Leaves -ovate, acuminate. Stamens 20 to 50 ? Nos. 6, 7 



Leaves deltoid, acuminate, smooth Nos. 8, 9 



Leaves lobed, white-toinentous beneath No. 10 



1 P. angulata AiL T\TATER POPLAR, WESTERN COTTON* TREE, branches acutely 

 angular or winged; Ivs. ovate-deltoid, subcorclate, uncinate-serrate, acuminate, 

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

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

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

 trees 2 to 3' long, about the same width, truncate at base, on younger shoots 

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

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

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



2 P. monilifer^ Ait. XECK-LACE POPLAR. COTTON- WOOD. Branclilets angular, 

 becoming terete-, Ivs. broadly deltoid-ovate, acuminate, serrate-dentate, smooth, 

 teeth incurved, ciliate, base nearly entire and subcordate; scales of the ament 

 lacerate-fringed, not hairy ; stigmas 3 or 4, very large. A large tree, 60 to 80f 

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

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

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

 pendulous, at length 4 to 8' loag and the -capsules remote Buds varnished as :u 

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



3 P. tremuloides MX. 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 the trunks of the oldest trees. Lvs. small (2 to 2f 



