116 FLORA OF PHILADELPHIA. 



Branches drooping; leaves linear-lanceolate. 



5. S. Bdbylonica. 

 Filaments glabrous; bracts persistent. 6. >S. cordata. 



Very low shrubs with serrate or crenate, obtuse leaves; filaments gla- 

 brous. 7. S. myrtillifolia. 

 Capsule silky or tomentose. 

 Filaments distinct. 



Capsule distinctly pedicelled, rostrate ; style none or short. 

 Mature leaves not densely hairy beneath. 

 Leaves linear or linear-lanceolate. 



Filaments hairy; capsule slightly silky when young, 



in age glabrate. 8. S. fluviatilis. 



Filaments glabrous; capsule permanently hairy. 



9. S. petiolaris. 

 Leaves oblong, elliptic, or ovate-lanceolate. 



Bracts fuscous, obovate or cuneate, long-hairy. 



10. S. discolor. 

 Bracts yellow, linear-oblong or lanceolate, 



11. S. Bebiiana. 

 Mature leaves densely white-hairy beneath. 



Leaves white-tomentose beneath. 



Leaves ovate-lanceolate, slender-petioled. 



11. S. Bebbiana. 

 Leaves oblanceolate, short-petioled. 



Leaves 5-10 cm. long; fruiting aments 2-3 cm. 



long. 12. S. humilis. 



Leaves 2-4 cm. long; fruiting aments 1 cm. long, 



13. S. tristis. 

 Leaves silvery -silky beneath. 14. S. ■sericea. 



Capsule subsessile. 15. S. viminalis. 



Filaments united; pedicel and style none. 16. S. purpurea. 



1. Salix nigra Marsh. Black Willow. M. p. 312. Along streams. Spring. 



Philadelphia— Bjherry, Mart. (B. C), 45th and Market streets (Mac). 

 Bmc^s— Narrowsville (Mac), Delaware— Darby Creek, Dr. Geo. Smith 

 (Fu.), Tinicum (B. Sm.), Concord (W. Tr.). Chester— {Y.). Lancaster 

 — (P.). LeM^^/i— Along the Lehigh (Kr.). Northampton— (P.) . Dau- 

 phin— (F.). 



New Jersey — Common. 



New Castle— Common. 



la. Salix nigra falcata (Pursh.) Torr. M. p. 313. Along streams. 

 Spring. 

 Philadelphia— 'ByheTTj, Mart. (B.C.). Bmc^s— Sellersville (Fr.). Dela- 

 ware— Dnrhj Creek (Fu.). 

 New Castle— "Not common. 



2. Salix lucida Muhl. M. p. 313. Swamps and banks of streams. Spring. 



Philadelphia— 'Nicetoyvn (Le.). Buclcs— Banks of Delaware, Mart. (B. 

 C). Chester— (P.). Lancaster— (P.). Le7n^?i— Lowlands, Coplay (Kr.). 

 Northampton— 'Easton, Porter (B. C). 



Monmouth—Sandy Hook (Mac). 



New Castle — Cherry Island, Commons. 



3. Salix fragilis L. Cracic Willow. M. p. 313. Escaped from cultivation. 



Spring. 



4. Salix alba L. White Willotv. M. p. 313. Moist soil. Spring. 



Philadelphia — Byberry, Mart. (B. C), 46th and Chestnut streets 



