OiiDER 123.— THE WILLOWORTS. 



281 



2 B 



1 B. excel'sior. Yelloio Birch. Tree 50-80f. Fertile aments erect, obloug, 1 inch 



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

 lenta. Black B. Sweet B. Tree 40-GOf. Fertile aments erect, oval, obtuse, 

 stalked; sterile 2-3', pendulous. Inner bark sweet-spicy. M. N. 

 B, ni'gra. Red Birch. Tree 30-50f. Leaves rliombic-ovate, acute at both ends, 

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



4 B. populifo'lia. TV/die B. Tree 30-40f. Leaves triangular, long-pointed, 



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



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



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



B. pum'ila. Z>«w/i?. Shrub erect, 2-6f. Branches warty. Leaves obovate, ob- 

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



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

 of fertile amcnt deeply 3-parted. 3-12''. Mountains, N.-II. 



Order CXXII. SALICACE J]]. The Willoworts. 



Trees or sTiriibs^ with simple leaves, and stipules usually present; 

 flowers dioecions, naked, both kinds in aments, each with a bract; 

 wary 1 or 2-celled, with 2 short styles; capsule many-seeded; 

 seeds with a coma and no albumen. 



C36 637 



Fig. 634. A fertile flower of a Willow, consisting of a pistil and a bract Fig. 635. Sterile 

 flower, 2 stamens and a Iract Fig. 636. A sterile flower of Ualni-of-Gilead {Pojmlus candi' 

 cans); many stamens. Fig. 637. A fertile flower, consisting of a fringed scale, n calyx holding 

 a double ovary. 



Analysis of the Genera. 

 § Aments cylindric, bracts entire. Stamens 2 or more. Capsule 1-celled, 2- 

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

 (Figs. 12, 17, SS.) We have about 27 t^jie- 



Willow. Osier. Salix. 

 Stamens 8 or more. Capsule 2-celled, 2- 

 Buds varnisliod with a fragrant resin. 



Poplar. Acpen. I'orcLcs 



Leaves often long and narrow, 

 cies. 

 § Aments cylindric, bracts fringed, 

 valved. Calyx an entire cup. 

 Leaves broad, largo. Trees. 



