SALICACEAE 



263 



2. Salix [Tourn.] L. 



Capsule glabrous. 



Trees or larger shrubs; leaves acute or acuminate, serrate. 

 Stamens 3-7. 



Pedicels slender, 3-5 times as long as the gland. 



Petioles and stipules without glands. I. S. nigra. 



Petioles and stipules with prominent glands. 



Leaves green on both sides; fruit ripening 

 May-July; rachis smooth. 

 Capsule conic-subulate; mature leaves 



short acuminate. 2. 5. pentandra. 



Capsule conic-ovoid; mature leaves 



with long acuminate curved tips. 3. 5. lucida. 



Leaves pale beneath, fruit ripening August- 

 October; rachis white-pilose. 4- 5. scrrissima. 

 Pedicels about twice as long as the gland. 5. 5. jragilis. 

 Stamens 2. 



Filaments hairy at the base; bracts caducous, yellow. 



Pedicels in fruit 1-3 mm. long. 5 S. Jragilis. 



Pedicels in fruit less than 1 mm. long; stigma 

 sessile. 

 Branches not drooping. 6. 5. alba. 



Branches drooping (weeping willow). 7- -S. babylonica. 



Filaments glabrous; bracts persistent. 8. S. cordata. 



Low shrub, leaves entire. 9- 5. pedicellaris. 



Capsule not glabrous, silky nor tomentose. 

 Filaments distinct. 



Capsule distinctly pedicelled, rostrate 



Mature leaves not densely hairy beneath. 

 Leaves linear or linear lanceolate. 



Filaments hairy, capsule glabrate in age. 10. 5. interior. 



Filaments glabrous, capsule permanently 



hairy. II- S. petiolaris. 



Mature leaves oblong, elliptic, or ovate-lan- 

 ceolate. 

 Bracts brownish, dark, ovate or cuneate. 12. 5. discolor. 



Bracts yellow, light, linear-oblong or lan- 

 ceolate. 

 Bracts longer than the pedicels. 13. 5. squamaia. 



Bracts shorter than the pedicels. 14. 5. Bebbiana. 



Mature leaves densely hairy. 



Leaves white tomentose beneath. 

 Style less than 1 mm. long. 



Leaves ovate-lanceolate, slender-peti- 



oled. '4- -S- Bebbiana. 



Leaves oblanceolate. 



Leaves 5-10 cm. long, aments 2-3 



cm. long. 15. -S. humilis 



Leaves 2-5 cm. long, aments I cm. 



long. 16. S. Iristis. 



* Prepared with the assistance of Dr. P. A. Rydberg. 



