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There are a few of the eucalypts that retain their early form through- 

 out life. One of these is E. risdoni, which is a bluish gray in color of 

 its foliage and has nearly all its leaves opposite and sessile. Another 

 is E. gamophylla, which lias a similar coloring, with the leaves all 

 opposite and united, whence the name gamophylla, or married leaves. 

 The flower consists of a cup-like persistent calyx, on which the numerous 

 stamens are inserted surrounding the pistil. There is no corolla. In 

 some forms the flowers are brilliantly colored and of large size, while 

 in others they are greenish hued and comparatively inconspicuous. 



The eucalypts are valuable for the rapidity of their growth, the 

 excellence of their timber, and the oils contained in their leaves. Add 

 to these the great beauty of many of the species, and we have qualities 

 which make these trees worthy of extensive trial wherever the climate 

 will admit of their growth. 



All the eucalypts must be transplanted when very young. The 

 extraordinary rapidity of their growth makes this essential. This 

 quality of the ability of the young to get an immediate possession of a 

 prepared soil is doubtless one, if not the main, cause of their extensive 

 popularity in all climates in which they can thrive. The economy of 

 setting small trees, the short time that care is required, and the small 

 cost of the trees on account of the short nursery handling are due to 

 this feature of their rapid growth. 



The genus has several groups of species that when mature are diffi- 

 cult to differentiate, largely on account of a tendency to vary accord- 

 ing to the climate and soil in which the tree is found. The bark, the 

 color of the leaves, as well as the general appearance of the tree, are 

 consequently often deceptive. From this or some other cause great 

 trouble has been experienced in obtaining seed and trees true to name. 



E. viminaliSj for instance, was introduced into California as the 

 very valuable timber tree E. rostrata. It was extensively planted, and 

 though a valuable timber tree in its own line, did not equal the real 

 red gum in any way. This costly and disappointing work was done 

 through a seedman's error. Both seeds and trees can now be obtained 

 in California true to name. Doubtless many nurseries can furnish 

 reliable stock. 



USES. 



The use of eucalyptus wood is being constantly extended. It is now, 

 for instance, the exclusive source of rollers for moving buildings, an 

 extensive business in southern California on account of the rapid 

 growth of the towns, making land too valuable in the business centers 

 for the early built buildings. George W. Bell has just written a pam- 

 phlet on the advantages of eucalyptus wood for paving. 



An important by-product of the genus is eucalyptus oil, which is 

 extracted from the leaves. Many of the species contain oils of the 

 same general character, called eucalyptol, cuminol, citronellon, gerauiol, 

 phellandrene, etc. Of these eucalyptol is best known, and possesses 



