Distribution of Orders.] INTRODUCTORY ESSAY. 
Stackhousire : containing only about 20 species, and of which representati' 
Zealand and the Philippine Islands. 
G-oodeniaeese : very closely allied to Campanulacea; and LobeJiaccci. 
Stylidieno : ditto. 
Epacrideae : a division of Ericece. 
Casuarinese : very near Myricece. 
Xerotideae 
Xerotideae ") 
Aphyllanthe* J sectiona of LiUaee(S OT Junce(B ' 
Other Orders which are less peculiar but are largely developed and equally c 
of Australian vegetation than the other, 
Dilleniacea3, after Australia, abound 
Kutaceae „ „ 
Proteaceae „ „ 
Eestiacea3 „ „ 
Thymeleae „ „ 
Haemodoraceae „ „ 
Buettneriacese „ „ 
Droseraceaa „ „ 
Turning again to other 
I find that South America < 
about as many. 
South Africa. 
Ditto. 
Ditto. 
Ditto. 
Ditto. 
Ditto. 
Ditto. 
which are remarkable for the peculiarity of their vegetation, 
lany more peculiar families than Australia, and South Africa 
On the Ausi / Natural Orders. 
I have attempted in various ways so to group the Orders as to show the geographical distribution 
of the characteristic ones ; of these I shall select the following as illustrating most clearly, both that 
the temperate Flora is more peculiar than the tropical, and that that quarter of the continent which 
is geographically most isolated contains the greatest number of peculiar features. 
A. Orders which are most characteristic of Australia, and almost confined to it : — 
1. Stackhousieae 1 
as most species ii 
the South-west ; 
text, South-east ; fewest in the Tropics 
2. Goodeniaceaa 
South-west 
„ South-east 
Tropics 
3. Stylidieas 
South-west 
„ South-east „ 
Tropics 
4. Epacridea) 
South-east 
„ South-west „ 
Tropics 
5. Tremandreao 
South-west 
„ South-east „ 
Tropics 
6. Casuarineae 
South-west 
„ South-east „ 
Tropics 
7. Xerotideae 
South-west 
„ South-east „ 
Tropics 
Hei 
ice, Six-sevenths attain their maxim 
im in the South-west. 
One-seventh 
South-east. 
None 
„ Tropics. 
5. Orders which a 
ttain their maximum in Australia 
, and most of the Au« 
tralian gene 
: peculiar to that country : — 
