CONIFERALES 



235 



Cupressus macrocarpa grows down to the water's edge, with Pinus 

 radiata coming in a hundred meters farther back; so that the Cu- 

 pressus is confined, principally, to a strip about 100 meters wide. 

 The Pinus cannot grow where it is drenched by the breaking waves; 

 but, farther back, it crowds out the Cupressus. Pinus torreyana, 

 with its principal display a little north of San Diego, is also very re- 

 stricted in its distribution (fig. 245). Cupressus pygmaea, along the 

 same California coast, is equally restricted. 



Fig. 242, — Jtmiperiis monosperma: adult plants of bushy habit, near Tucson, Ari- 

 zona. 



There are other conifers almost as closely restricted in their 

 geographic distribution. Some of these extremely endemic forms, 

 especially Cupressus macrocarpa, have a world-wide distribution as 

 exotics. 



In some conifers, like Cedrus, Larix, Pseudolarix, and Pinus, 

 there are long shoots and spur shoots, like those of Ginkgo, but the 

 leaves on the spurs are fascicled. In the first three of the four genera, 

 the leaves are numerous and spirally arranged, and fall ofi in 1-5 

 years, leaving the spur attached to the long shoot. In Pinus, leaves 



