Trees, Shrubs and Vines 



185. Long-stalked Willow. (Salix petiolaris.) 

 Leaf : as in 184, but not so silky beneath, and when mature 

 with a bloom ; not as black when dry ; 4°-i5° high. 



186. Myrtle Willow. (Salix myrtilloides.) 

 Leaf : 1-2', simple, alternate, entire, edge rolled under, ellip- 

 tical to oblong, very smooth, lighter or with bloom beneath, 

 rather thick. New England, westward, and New Jersey ; i°-3°. 



187. Livid Willow. (Salix livida.) 

 Leaf : 2-3', simple, alternate, oblong or long-obovate, apex 

 sharp, scarcely toothed, downy above, beneath veiny, soft-hairy 

 and with bloom. New England to Pennsylvania, and west. 



188. Dwarf Birch. (Betula glandulosa.) 

 Leaf: 3^ '-|^', simple, alternate, round-toothed, obovate with 

 wedge-shaped base, or quite roundish, thickish, both sides green ; 

 branchlets strongly marked with wart-like dots. Flower : stam- 

 inate in long and pendent, pistillate in short, catkins ; early 

 spring, before or with leaves. High mountains of northern 

 frontier, and shore of Lake Superior ; i°-4° high. 



189. Green Willow. Mountain Willow. (Salix chloro- 

 phylla.) 



Leaf : I'-s', oblong to reverse-lance-shaped, mostly entire, 

 glossy, very smooth, leathery when mature. Alpine tops of White 

 Mountains ; low, spreading. 



190. Herb Willow. (Salix herbacea.) 

 Leaf : i', simple, alternate, roundish, serrate, base cordate, 

 apex notched, glossy. Alpine tops of mountains in New Eng- 

 land ; smallest willow, branches only one or two inches high 

 from creeping stem. 



191. Bear-berry Willow. (Salix Uva-ursi.) 

 Leaf: %^', simple, alternate, slightly serrate, elliptical with 

 apex sharp, or obovate and blunt, glossy, a little bloom beneath. 

 Alpine tops of mountains in New England and New York ; very 

 low shrub. 



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