THE WILLOWS OF OHIO. 26i 



( .). Aments long in fruit with many capsules, stigmas greenish 



white when fresh. , S. discolor. 



9. Aments short and thick, few flowered, stigmas red when 



fresh. 5. humilis. 



10. Aments short, scales frequently darkened at the tip, 



leaves narrow, turning black. 5. petiolaris.. 



10. Aments long, scales yellow, leaves broader, strongly 



veined, remaining green. S. bebbiana. 



11. Capsules hairy. 12. 



11. Capsules glabrous. 16. 



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



12. Style less than 1 mm. long. 13. 

 13. Capsule subsessile, blunt pointed, stigmas sessile. 5. interior. 

 13. Capsule with a distinct pedicel, acute, narrow conic, stigmas 

 rarely sessile. 14. 

 14. Capsule thinly hairy, almost glabrescent, aments short, 

 leaves narrow, silvery, blackening; northern. 



5. petiolaris. 

 14. Capsule persistently hairy, aments long. 15. 

 15. Scales persistent, light colored, leaves broad, wooly below 

 with prominent veins, pedicels very long; northern. 



5. bebbiana. 

 15. Scales usually deciduous at length, almost black, leaves 

 without prominent veins, pedicel short to medium. 



S. discolor. 

 16. Capsules long pedicelled. 17. 

 16. Capsules short pedicelled or sessile. 19. 

 17. Aments short, bracts obtusish, small, capsules generally 

 redening; small shrub in sphagnum bogs only. 



S. pedicellaris. 

 17. Aments long, bracts large; good-sized shrubs or trees. 18. 

 18. Capsules narrow conic ; northern. S. amygdaloides. 



18. Capsules mostly globose conic; extreme south. 



5. longipes. 

 19. Capsules short conic, aments nearly glabrous. 20. 

 19. Capsules rather long conic. 22. 



20. Aments dense, short (25 -mm. or less) of small calibre, 



with a few small bracts. 5. babylonica. 



20. Aments longer, bracts larger. 21. 



21. Scales as long as the ovulary, capsules yellowing in fruit, 



aments rather lax ; leaves pubescent, glaucescent. S.alba. 



21. Scales shorter than the ovulary at anthesis, capsules green, 



aments dense; leaves glabrous, green. 5. nigra. 



22. Bracts, especially stipules, very glandular, coriaceous, 



bracts and leaves broad, green, capsules when ripe 



more than 6 mm. long; northern. 5. lucida. 



