136 KEY TO GENERA AND SPECIES 



200. Mature leaves smooth, or essentially so, on 

 both surfaces. Throughout our range. 

 (Figs. 259, 260.) American Basswood, 

 American Linden, Basswood, Linn, Beetree, 

 Wlckup, Tilia americana L. 



200. Mature leaves beneath, and the twigs, red- 



Fig. 258. Euro- 

 pean Linden. 



Fig. 259. American 

 Basswood. 



dish hairy. Leaves 2 to 3 inches long. 

 Conn, westward and southward. (Fig. 

 261.) Southern Basswood, Tilia Michauxii 

 Nutt. 



:oo. Mature leaves 4 to 8 inches long, silvery-white 

 and woolly beneath. Central N. Y. and 

 southward along the mountains, and west- 

 ward. (Fig. 262.) White Basswood, Tilia 

 heterophylla Vent. 



