152 BOTANICAL INFORMATION. 



semblance to the adjacent colonies as the southern tract of this province 

 bears to Van Diemen's Land. 



Still, there remains yet a considerable number of plants which im- 

 press on our vegetation a type of peculiarity ; and I maybe permitted, 

 for this reason, to call attention to our remarkable species of Panaco^ 

 resembling mainly those of the Moluccas ; to Trigonella suavissima, as 

 the only^Australian Clover ; to the species of Psoralea and to Crantziay 

 as connecting links with the American Flora; to Pseudomorus Atis* 

 tralasica^ the indigenous Mulberry-tree ; to Myrsine Howittiana^ more 

 nearly connected with the New Zealand species than with those of New 

 South Wales] and to the Alpine Anisotome glacialis^ as a genus from 

 Auckland and CampbeU's Islands. 



With regard to the PhytogeograpJiia of this country, it may be 

 deemed worthy of notice that, in the arid steppes beyond the Glenelg 

 E-iver, the vegetation undergoes a remarkable change; and a large num- 

 ber of such plants as are common to Victoria, New South Wales, and 

 Van Diemen's Land, cease to exist, not even re-appearing further to 

 the westward, where the physical character of the country assumes 

 once more equality or similarity to the eastern provinces. Others, again, 

 extend the geographical limits of certain genera or species which we 

 thought to belong entirely to Western Australia ;, thus, for instance, 

 Thomada jjetalocalyx and Coleostylis Preissii range to the 148th me- 

 ridian. 



It may also be worthy of remark, that the Order of LeguminoscB pre- 

 vails decidedly here, as in Western Australia, over all others ; and that 

 the Composit(S^ far exceeding in South Australia, and almost through- 

 out the world, any other groups, rank here as the second order. Both, 

 taken together, show such eminent richness as to comprise nearly a 

 fourth of all Dicotyledonous plants. The most predominant Natural 

 Orders exhibit here, with regard to their number of species, the following 

 series: — Leguminosa^ Compositt^, Myrfacea^ Algce^ Filices, Cyperoidece, 

 Gramine(By Musci, Profeace^, Orchidece^ Epacridece^ Pung% TJmhellifercB^ 

 Biosmece^ Liliacece^ Lichenes^ Labiat(Sy Goodeniac€<e^ ScropJitdanntB^ and 

 SalsolacecB. 



Finally, and perhaps as to the most important point of my re- 

 searches, I have to notice the practical usefulness of our vegetable 

 creation, either with regard to medicine, manufactures, or in a domestic 

 point of view. 



