264 SALICACEAE 



Style more than 1 mm. long. 17. 5. Candida. 



Leaves silvery beneath. 18. S. sericea. 



Capsule subsessile, tree with silvery, acuminate leaves. 19. 5. viminalis. 



Filaments united; pedicel and style none. 20. 5. purpurea. 



i. S. nigra Marsh. In wet soil: N. B. to western Ont. and N. 

 Dak., south to Fla. and Tex. 



Throughout the range, apparently decreasing northward; rare 

 and introduced in the pine-barrens. 



2. S. pentandra L. Cultivated and rarely escaped : New England 



to Ohio. 

 Very rare as an escape in the range. 



3. S. lucida Muhl. In swamps and along riversides: Newf. to 



N. J. and Pa., westward to Athabasca, Ky. and Neb. 

 Conn. " Occasional." 



N. Y. Rare on L. I.; on S. I., increasing and common northward. 

 N. J. Sussex, Morris and Essex counties, increasing northwest- 

 ward; also at Sandy Hook, Monmouth Co. 

 Pa. Northampton, Lehigh, Bucks, Philadelphia, Delaware and 

 Chester counties. 



Tertiary, o: Cretaceous, perhaps in Bucks Co., Pa.: Older Forma- 

 tions, not very common. 118-204 days. Sea level-1,000 ft. 



4. S. serissima (Bailey) Fernald. In bogs and wet meadows: 



Que. to Alberta, N.J. and Wise. 



Conn. Northwestern Litchfield Co. and from Westville, New 



Haven Co. 

 N. J. Sussex Co. 



Tertiary, o: Cretaceous, o: Older Formations, rare. Not south 

 of the moraine. 138-145 days. Sea level-690 ft. 



5. S. fragilis L. Along streams: Newf. to Ky. Native of 



Europe. 



Frequent as an escape from cultivation in some parts of the 

 range. 



6. S. alba L. On wet soil or on uplands: N. S. and Ont. to 



N. Car., westward to Idaho and Iowa. Native of Europe. 

 Locally abundant as an escape from cultivation. 



7. S. babylonica L. Widely cultivated and sometimes spreading. 



Native of Asia. 



Not very common as an escaped plant. 



