HARDY TREES 221 



as single specimens on the lawn or roadside for 

 purposes of shade; some of the best for this pur- 

 pose in the following list are marked with a dag- 

 ger (t). Those plants marked with an asterisk 

 (*) are native to Michigan. 



I. TREES FOR WINDBREAKS, OR SHELTER BELTS. 



White pine, Pinus Strobus.* 

 Austrian pine, P. Austriaca. 

 Scotch pine, P. sylvestris. 

 Red pine, P. resinosa.* 

 Norway spruce, Picea excelsa. 



Any of the rapidly growing, native forest trees, especially: 

 American elm, Ulmus Americana. *t 

 Sugar maple, Acer saccharinum*^ and var. nigrum.*^ 

 Basswood, Tilia Americana.*^ 

 Cottonwood, Populus monilifera.* 

 Balsam poplar, P. balsamifera.* 

 Balm of Gilead, P. balsamifera var. candicans* 

 Wild black cherry, Primus serotina.* 

 Box -elder, Negundo acer aides * 



II. TREES FOR GROUPS OR SINGLE SPECIMENS. 

 A. Deciduous Trees. 



Norway maple, Acer platanoides .^ 



One of the finest trees for single lawn specimens, especially in tranquil 

 scenes. It droops too much and Is too low-headed for roadside planting. 

 Black sugar maple, A. saccharin-urn var. nigrum.*^ 



Darker and softer in aspect than the ordinary sugar maple. 

 Sugar maple, A. saccharinum.*^ 



This and the last are the best roadside trees. 

 Wier's cut-leaved silver maple, A. dasycarpum, hort. var. 



Light and graceful. Especially desirable for pleasure grounds. 

 Silver maple, A. dasycarpum.*^ 



Desirable for water-courses and for grouping. Succeeds on both 

 wet and dry lands. 



