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EUCALYPTUS MACROCARPA. 
Although the whole of the Eucalypti are considered greenhouse plants, yet many 
of them are nearly hardy, and the remainder should be placed in a very cool part 
of the greenhouse, and are all the better for being set in the open air during the 
summer months. They thrive in a mixture of equal parts of loam, peat, and sand, 
and may be easily propagated by cuttings of the half-ripened wood planted in sand 
under a hand-glass. 
Of those which have succeeded in the open air in the warmer counties of 
England, E. robusta, piperita, and rotunda may be particularly mentioned : the two 
former flourish and grow vigorously in the Isle of Wight, where, in the neighbour- 
hood of both Cowes and Newport, we saw plants in 1843, seedlings of but a few 
years old, which had already attained twenty feet or more high. They had stood 
two winters in the situations they then occupied, and had sustained no injury. 
All the species abound in an aromatic essential oil. This becomes so concrete 
in E. resinifera, as to resemble gum kino. E. robusta also contains a large quantity 
of a similar red-coloured gum. E. mannifera exudes a saccharine mucous sub- 
stance, resembling manna, both in its action and appearance. Other species are 
said to yield a similar secretion, and E. Gunnii is stated on being wounded " to 
furnish the inhabitants of Tasmania with a cool, refreshing, slightly aperient 
liquid, which ferments and acquires the properties of beer." The bark contains a 
large quantity of tannin, which is said to be stronger than that of the Oak. 
The generic name is derived from eu, well, kalypto, to cover, as with a lid, 
because the limb of the calyx, which covers the flower before it expands, falls off in 
the form of a conical lid or cover. The specific name is given on account of the 
size of the fruit. 
