334 SALICINE^. (WILLOW FAMILY.) 



* * Leaves sinaller, paler, more rigid, mostly spinous-dentate, and (at least south' 

 ward) more or less persistent : calyx-lobes broader and ivoolly : acorns often 

 slender and Zowgrer. — Ranging farther north and east than the other 

 group. 

 Var. Wrightii, Enge]ra. Leaves small (an inch long or less), sinuate- 

 dentate, the teeth ver}' rigid and pungent. —The Q. Emoryi of Fl. Colorado, 

 with which Arizona species it has been constantly confounded. 



Var. grandi folia, Engelm. Leaves very large (3 to 5 inches long), 

 nearly entire or undulate : peduncles very long. — Upon the Upper Arkansas 

 {Brandegee) and Arizona, 



Order 75. SALICINE-SJ. (Willow Family. ) 



Dioecious trees or shrubs, with both kinds of flowers in catkins, one 

 under each bract, entirely destitute of floral envelopes ; the fruit a 

 1 -celled and 2-valved pod, with numerous seeds furnished with long 

 silky down. — Leaves alternate, undivided. 



1. Salix. Bracts entire. Flowers with small glands ; disks none. Stamens few. Stigmas 



short. Buds with a single scale. 



2. Populus. Bracts lacerate. Flowers with a broad or cup-shaped disk. Stamens 



numerous. Stigmas elongated. Buds scaly. 



1. SALIX, Toum. Willow. Osier. (By M. S. Bebb, Esq.) 



Araents preceding or accompanying the leaves. Filaments filiform, free 

 or more or less connate. Ovary and capsule more or less conical. —Trees, 

 shrubs, or undershrubs, mostly confined to the neighborhood of water : leaves 

 mostly long and pointed, feather- veined. 



§ 1. Aments on short lateral leafy hranchlets : scales yellowish, falling before the 

 cajjsitles mature : filaments hairy below : shrubs and small trees of the low- 

 lands. 



* Stamens 3 to 5 : ca2}sules glabrous : leaves lanceolate, serrate. 



1. S. amygdaloides, Anders. Leaves lanceolate or ovate-lanceolate, 

 2 to 4 inches long, | to 1 inch wide, attenuate-cuspidate, paler or glaucous 

 beneath, closely and sharply serrate ; petioles slender eglandnlar ; stipules 

 minute and very early deciduous : staminate aments elongated, slenderly-cylin- 

 drical, 2 to 3 inches long, subflexuose, the flowers somewhat remotely and 

 subverticir.ately arranged on the slender rhachis ; fertile becoming very loose in 

 fruit, 3 to 4 inches long : scales in male aments ovate, villous with crisp hairs, in 

 the female narrower, smoother, and fugaceous : capsules lanceolate, on slender 

 pedicels; style very short or obsolete, stigmas notched. — A small tree, grow- 

 ing on the banks of streams, from New York and Missouri west to Oregon. 

 The nearly allied S. nigra, so conmion between the Gulf of Mexico and the 

 Great Lakes, has not been found within our limits. 



2. S. lasiandra, Benth. , var. Fendleriana, Bebb. Leaves lanceolate, 

 tapering to a very long attenuate point, coriaceous, scarcely paler beneath, 



