126 Proceedings of the Ohio State Academy of Science 



7. Leaves obovate, oblong or oblanceolate, rather thin, acute at both 



ends, irregularly or indistinctly toothed, glaucous and nearly white 

 beneath ; bracts fuscous, obovate or cuneate, long-hairy ; capsule 

 silky or tomentose, stalked. 5". discolor. 



8. Petioles short; leaves narrowly lanceolate, usually falcate, nar- 



rowed at the base, glabrous or slightly pubescent, green on both 

 sides or slightly paler beneath. S.- nigra. 



8. Petioles rather prominent and slender except in some individuals; 



leaves lanceolate or broader. 9. 



9. Leaves dark-green above, glaucous or whitish beneath not coria- 



ceous. 10. 



9. Leaves yellow-green and glossy on both sides, thick, normally ovate, 



very long acuminate with a slender tip; catkins thick and dense, 

 stamens mostly 3, flower bracts dentate; capsule large, short- 

 pedicelled ; twigs brown, polished. 5". lucida. 



10. Leaves ovate-lanceolate, broadest below the middle, acuminate, peti- 



oles often red; stamens 5-12; capsule narrow-conic, pedicel slen- 

 der, 3-5 times as long as the gland ; bark rough, brown. 5". amyg- 

 daloides. 



10. Leaves lanceolate, long-acute ; stamens 2, capsules very narrow- 

 conic, pedicel short, about twice as long as the gland ; bark gray. 

 5". fragilis. 



10. Leaves lanceolate or oblong-lanceolate, rounded, subcordate, or nar- 

 rowed at the base, 3-8 in. long; very white and somewhat pu- 

 bescent beneath ; capsule conic, pedicel slender, 3-5 times as long 

 as the gland ; bark dark reddish-brown with small scales. 5. 

 longipes. 



1. Salix nigra Marsh. Black Willow. A medium-sized 

 tree with rough, flaky, dark brown bark. Leaves narrowed at 

 the base, serrulate, 2-5 in. long, ^-^ in. wide, or wider; capsule 

 ovoid, acute, about as long as its pedicel. Along streams and 

 lakes. The subspecies S. nigra falcate (pursh.) Torr. has nar- 

 rower more falcate leaves. Hybridizes with S. alba. N. B. to 

 Ont., Fla., Cal, and Kan. Ohio. 



2. Salix longipes And. Ward Willow. A tree with 

 spreading or drooping branches and dark reddish-brown bark. 

 Leaves lanceolate or oblong-lanceolate, rounded, subcordate, or 

 narrowed at the base, 2-7 in. long, |-i^ in. wide, somewhat 

 pubescent beneath ; capsule conic. Wood dark brown. Along 

 streams and lakes. Md. to Mo., south to Fla., and Texas. 



