ADAPTATION OF CONIFERS 99 



There are many varieties of Lawson cypress, Chamcecy- 

 paris Lawsoniana, and most of them succeed well near the 

 west coast of British Columbia where the winters are mild. 

 In eastern Canada they are not hardy. Some of the best 

 varieties are Alumi, argeniea, erecta glauca, erecta viridis, 

 glauca, gracilis, and pyramidalis. 



White-cedar, Chamoocyparis thyoides, is hardy in eastern 

 Canada and is interesting as being a native of the Eastern 

 States. It is rather loose in habit with dull-colored foliage, and, 

 on the whole, is not very ornamental, though interesting. 



Hinoki cypress, Chamoocyparis obtusa, is a Japanese species 

 which is fairly hardy at Ottawa if grown in a rather sheltered 

 place, but needs a milder climate for best development. There 

 are several good varieties which show to advantage in the 

 coast region of British Columbia, among the best being var. 

 aurea. 



Sawara cypress, Chamoecyparis pisifera, proves fairly satis- 

 factory' in eastern Canada, being practically hardy. It is not 

 as ornamental, however, as its varieties, which are referred to 

 under retinispora. 



The retinisporas. 



The retinisporas are graceful Japanese conifers which are 

 very useful for landscape effects in eastern Canada and in 

 British Columbia near the coast. There is a marked difference, 

 however, in the relative hardiness of the sorts, some of the 

 varieties of Retinispora pisifera being the hardiest and most 

 useful. They are really cypress of the genus Chamaecyparis. 



Retinispora pisifera is hardy at Ottawa, but is not so orna- 

 mental as certain of its varieties. Among the best of these is 

 var. filifera, which may be considered perfectly hardy at 

 Ottawa, and, after a thirtv-vear test is still in excellent condi- 



