ROWLEE : NORTH AMERICAN WILLOWS 253 



gland in the staminate flower, silvery silky capsules, and red 

 stigmas. 



8. Salix interior nom. nov. 



Salix rubra Rich. Franklin Journ. App. 7: 765. 1823. Not 

 Huds. 1762. 



Salix longifolia Muhl. Neue Schrif. Gesell. Nat. Berl. 4 : 238. 

 //. 6.f. 6. 1803. Not Lam. 1778. 



Salix fluviatilis of Sargent and other recent authors in part. 



Varying in stature from a low shrub to a small tree, usually 

 growing along streams and lake shores : twigs smooth and brown 

 to densely tomentose and gray : buds plano-convex with an obtuse 

 and rounded apex, very small : leaves nearly or quite smooth, 

 sparsely canescent, to extremely canescent, sessile, linear-elliptical, 

 ordinarily 8-10 cm. long and less than I cm. wide, varying to much 

 wider in young vigorous shoots, remotely dentate, the teeth narrow, 

 sometimes quite spinulose : stipules conspicuous, ear-shaped, ob- 

 scurely denticulate, deciduous : aments of late spring on short 

 lateral peduncles, which bear four to six leaves, those borne later 

 in the season on much longer leafy branches, very loosely flow- 

 ered, the flowers fascicled in clusters of two to five on the axis, 

 a distinct interval between the fascicles, first appearing in May 

 and often bearing a second set of aments in early summer ; at 

 anthesis, aments 2-4 cm. long and 1-2 cm. thick ; scales usually 

 glabrous or somewhat hairy toward the base, narrowly oblong, 

 yellowish, deciduous, after flowering : glands large, two in the 

 staminate, one in the pistillate flower : filaments crisp hairy below, 

 smooth above : capsules sessile, clothed when young with appressed 

 silvery hairs, becoming nearly smooth at maturity : stigmas short, 

 sessile : style none. 



The pistillate ament, lax at anthesis, becomes more so as the 

 capsules mature and by this character the species can easily be 

 distinguished from related species. 



Salix interior Wheeleri var. nov. 



Low shrub : young twigs whitened with appressed silky hairs, 

 becoming glabrous toward the end of the first season's growth : 

 leaves relatively short and broad, 7-8 cm. long by I cm. broad, 

 minutely and evenly denticulate, closely sessile, densely silky on 

 both sides, veins nevertheless evident, rather abruptly acute. 



Throughout the Upper Mississippi valley and the basin of the 

 Great Lakes. Also occasionally upon the eastern slopes of the 



