196 WATER-LILIES 



They do well almost anywhere provided the 

 soil is not too dry. Ordinarily the native 

 common hemlock (Tsuga Canadensis) is 

 used, singly or in groups. It is also well 

 adapted to hedge purposes, but reaches a 

 height of about eighty feet if left alone. Taller 

 and more beautiful, but less hardy, is Tsuga 

 Mertensiana, a. species of Western North 

 America. 



On a moist, well-drained soil, plant the firs. 

 Foremost among them is Nordmann's {Abies 

 Nordmanniana), a tree reaching a height of 

 150 feet and which is much in demand on 

 account of its hardiness and beautiful foliage, 

 dark green and shining above, silvery white 

 on the lower surface. Abies concolor takes 

 equal rank with this tree. It is recommended 

 especially for the Eastern States, not only be- 

 cause of its rapid growth and great hardiness 

 but also because it suffers less from heat and 

 drought than do the other firs. 



Other desirable firs are A. Cilicica and A. 

 Cephalonica (of which the variety Apollinis 

 is more hardy in the North), A. homolepis 



