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There are a few of the eucalypts that retain their early form through- 
out life. One of these is HL. risdoni, which is a bluish gray in color of 
its foliage and has nearly all its leaves opposite and sessile. Another 
is £. gamophylla, which has a similar coloring, with the leaves all 
opposite and united, whence the name gamophylia, 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 weil 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. viminalis, for instance, was introduced into California as the 
very valuable timber tree /. 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. Itis 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, geraniol, 
phellandrene, etc. Of these eucalyptol is best known, and possesses 
