318 J.D. Hooker, Introductory Essay to the Flora of Tasmania. 
That the proportion of Gymnospermous plants to other Dico- 
tyledons is not increased. 
That all the Australian natural orders, with only two small 
exceptions, are also found in other countries; that most of those 
most widely diffused in Australia are such as are also the most 
widely distributed over the globe; and that Australia wants no 
nown order of general distribution. | 
That the only two absolutely peculiar natural orders contain — 
together only three genera, and very few species; they are, fur — 
ther comparatively local in Australia, and are rather aberrant 
forms of existing natural families than well-marked isolated 
groups: Brunoniacee being intermediate between Goodeniaca — 
and Composite, and Tremandree between Polygalee and Buel 
neriacee 
eR. as e 
That the large natural orders and genera, which, though mt 
absolutely restricted to Australia, are there very abundant im spe 
cies and rare elsewhere, and for which I shall hence adopt the 
term Australian, stand in very close relationship to groups of i 
plants which are widely spread over the globe (as Hpacridea 
Ericee, Goodeniacee to Campanulacee, Stylidee to Lobeliacti, 
Casuarinee to Myricee). he 
That these Australian orders are exceedingly unequally dis 
tributed in Australia; that there is a greater specific differen? | 
between two quarters of Australia (southeastern and southwest — 
ern) than between Australia and the rest of the globe; and that : 
the most marked characteristics of the flora are concentrated # 
that point which is geographically most remote from any otitt 
region of the globe. ; 
That most of those Australian orders and genera which ws 4 
3 
development in Australia at points approximating in 
sO. : 4 
That in Australia itself, in advancing from the tropios tote 
tains, th 
Ww 
: obe. ‘ 
—- the relations between rss epochs of the flowering 
