Stectfrious urecs. 



173 



THE >"ETTLE FAMILY. 



Elm, Ulmus montana, V. campestris, U. Americana.— 

 These are well-known trees with obovate crowns, very 

 broad at the top, 



oblique -prays 

 and sometimes 

 slender, pendu- 

 lous branches. 

 The elms are 

 excellent trees 

 for avenues, but 

 often become 

 easy prey for 

 insects which 

 strip them of 

 every leaf in 

 dry Bummers. 

 They prefer 

 rich, loamy soil 

 with a gravelly 

 subsoil. Ulmus 

 campestris is ex- 

 cellent for 

 hedges. Of this 

 species there are 

 several sjood 





.$i&. 





WKmi^'^^i 





FIG. 88.-NETTLE TREE tCELTIS OCCIDENTALISM 



varieties, one with yellow leaves. The majority of its 

 numerous forms are of little or no importance. The same 

 may be said of the varieties of the Scotch elm ( U. Man- 



