Description of Foreign Trees 



20. European Linden. (Tilia europsea.) 



Leaf : 3-4', as in American species (" Native Trees," 20), but 

 not so cordate and oblique at base. Flower : as in American 

 species, but with no petal-like scale in front of petal as in our own 

 species. 



21. English Elm. (Ulmus campestris.) 



Leaf : 2'-4', simple, alternate, serrate, oval to obovate, pointed, 

 mostly smooth ; fruit deeply notched at apex ; branches horizontal 

 or upward slanting, 



22. Scotch or Wych Elm. (Ulmus montana.) 



Leaf : 2-5', simple, alternate, serrate, roughish, buds not 

 downy ; calyx, lobes and stamens about 5 ; fruit i' long, smooth. 



23. Small-leaved Elm. (Ulmus parvifolia.) 



Leaf : less than i', simple, alternate, serrate, elliptical, al- 

 most leathery ; blossoms in May and June with leaves ; fruit 

 ovate, not hairy, apex notched ; bark loosening in thick layers. 

 China. 



24. Long-stemmed Mountain Elm. (Ulmus effusa.) 



Leaf : 2-4', simple, alternate, serrate, elliptical, base tapering, 

 very one-sided, pointed, smooth above, long-stemmed ; blossoms 

 early, before leaves ; fruit hairy-edged. 



25. Willow. (Salix pentandra.) 



Leaf : 3-4', simple, alternate, serrate, ovate-elliptical, short- 

 pointed, bright green beneath, many glands on stem ; like laurel 

 leaf ; flowers in May. Europe. 



26. Lance-leaved Willow. (Salix lancifolia.) 



Leaf : 3-4', simple, alternate, finely but sharply serrate, oblong- 

 lance-shaped, hairy both sides when mature ; flowers before 

 leaves. Germany, 



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