BUCALYPTUS TREES. 159 
Labiate. The almost exclusive occupation of vast 
littoral tracts of Gippsland, and some of the adjoining 
islands, by the dwarf Xanthorrhcea minor, is remark- 
able. Mistletoes do not extend to Tasmania, though 
over every other part of Australia ; neither the Nar- 
doo (Marsilea quadrifolia), of melancholic celebrity, 
though to be found in every part of the continent, and 
abounding in innumerable varieties throughout the 
depressed parts of the interior. Equisetaces occur 
nowhere. The total of the species to be admitted as 
well-defined, and hitherto known, from all parts of 
Australia, approaches (with exclusion of microscopic 
fungi) to ten thousand. 
It has been deemed of sufficient importance to ap- 
pend to this brief memoir an index of all the trees 
hitherto discovered in any part of Australia. Such 
statistics lead to reflection and comparison. They also 
bring more prominently before the contemplative 
mind the real access which in any branch of special 
knowledge may have been obtained. In this instance 
it is the only table with which this document has been 
burdened, though kindred lists might have readily 
been elaborated. Nor would this imperfect sketch of 
Australian vegetation have been extended to any de- 
tailed enumerations whatever did not the trees im- 
press on the vegetation of each country its most dis- 
tinctive feature, and had we not learned how great a 
treasure each land possesses in its timber— whether 
as raw product to artisans or as objects of therapeutic 
application, whether as material for the products of 
manifold factories or as the source of educts in the 
chemical laboratory ; whether as the means of afford- 
ing employment to the workman, or even as the me- 
