features of the landscape. The trees should be planted from eighty to 100 feet 

 apart to allow room for the wide spread of branches in later life. 



CORK OAK 



The cork oak (Quercus suber), which forms extensive forests in Spain, 

 Portugal and other sections of the Mediterranean, is the source of the world's 

 cork supply. The bark has a specialized cork tissue which produces cork at a 

 much greater rate than any other tree. Cork was used by the early Greeks 

 and Romans to float nets, but did not come into general use until glass bottles 

 began to be used in the seventeenth century. 



In its native habitat, cork oak grows on low hills, and attains its greatest 

 size in deep, rather moist loam. It is evergreen in character, and reaches a 

 height of sixty feet and a diameter of four feet in the best situations. In 1860 

 acorns of the cork oak were planted in California, and from them came trees 

 which have reached a diameter of two feet and a height of forty feet. Cork 

 oak has no commercial value in this country, but makes a splendid ornamental, 

 street or highway tree. 



A number of fine specimens of cork oak are found in this state. They have 

 the general outline of the native live oak, except that the leaves are more 

 convex in shape. As the tree matures, it develops a corky bark which covers 

 the trunk with large fold-like corky excrescences. Cork oak makes a sym- 

 metrical tree with rounded head, and when planted where soil and moisture 

 conditions are favorable, makes a rapid growth. The largest cork oak in 

 the state is situated at Campo Seco in Calaveras County. 



COAST LIVE OAK 



Coast live oak (Quercus agrifolia), also known as holly oak from the 

 resemblance of its leaves to those of the holly, is a native tree of California that 

 is found in the Coast ranges from Sonoma County to Southern California. It 

 is a characteristic tree of the coast range valleys which it beautifies with low, 

 broad heads. It attracted the attention of the early Spanish explorers who 

 associated it with the fertility of the land. This is evidenced by the corre- 

 spondence of the chain of Franciscan missions within the general range of 

 this oak. 



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