Okdbe 123.— the WILLOWOETS. 



281 



1 B. excel'sior. Yellow Birch. Tree B0-80f. Fertile araents erect, oblorg, 1 inch 

 in length, erect, sterile 2-4', pendulous, clustered, c. N. 

 2 B, lenta. Black B. Sweet B. Tree 40-60f. Fertile aments erect, oval, obtuse, 



stalked ; sterile 2-8', pendulous. Inner bark sweet-spicy. M. N. 

 8 B. ni'gra. Bed Birch. Tree 30-50f. Leaves rhombic-ovate, acute at .both ends, 

 obscurely lobed. Fertile aments sessile, ovoid. M. S. W. 

 *4: B. populifo'lia. White B. Tree S0-40f. Leaves triangular, long-pointed, 

 smooth, unequally serrate. Sterile aments long, pendulous. N. 

 5 B. papyra'cea. Ganoe Bvrch. Tree 50-70f. Leaves ovate, pointed, doubly- 

 serrate. All the aments nodding. Hills and mountains. N. 

 B. pum'ila. Dwarf B. Shrub erect, 2-6f. Branches warty. Leaves obovate, ob- 

 tusely serrate above. Fertile aments cylindrio. Mountains. N. 

 B. na'na. Tiny B. Shrub low, trailing, smooth. Leaves_ round, crenate. 

 of fertile ament deeply 8-parted. 8-12'. Mountains. N.-H. 



6 



Oeder CXXII. SALICACBJE. The Willoworts. 



Trees or shrubs, with simple lemes, and stipules usually present; 

 flewers dioecious, naked, both kinds in aments, each with a bract ; 

 ovary 1 or 2-oelled, with 2 short styles; capsule many-seeded; 

 seeds with a coma and no albumen. 



V ■■ 

 '■'J ■-. 



Mg. 684. A fertile flower of a Willow, consisting of a pistil anC a bract. I'ig. 685. Sterile 

 flower, 2 stamens and a bract Fig. 636. A sterile flower of Balm-of-Gilead (PopvMis eamdv- 

 cans) ; many stamens, Mg. 63T. A fertile flower, consisting of a fringed scale, a calyx holding 

 a double oyary. 



Analysis of the Genera. 



% Aments cylindrio, bracts entire. Stamens 2 or more. Capsule 1-celled, 2- 

 valved, the seeds very small, clothed with silky .hairs. Trees or shrubs. 

 Leaves often long and narrow. (Figs. 12, 17, 88.) "We have about WT spe- 

 gjgg_ Willow. Osier. Salix. 



§ Aments cylindrio, bracts fringed. Stamens 8 or more. Capsule 2-celled, 2- 

 valved. Calyx an entire cup. Buds varnished with a fragrant resin. 

 Leaves broad, large. Trees. ^Boplar. Asj>en. Populhs. 



