BY THE REV. W. WOOLLS. 29 



colonies. Some genera of the Rutacese are endemic in the east, 

 and others are common to that part of Australia, tropical Asia, 

 and the isles of the Pacific. 



(5) Pelargonium Rodneyanum, Lindl., is not peculiar to W. 

 Australia, as it occurs in Victoria, N". S. Wales, and S. Australia. 

 In Mitchell's Expeditions, vol. ii. p. 144, it is stated that near the 

 Murray he discovered " a beautiful new species of the Cape Pelar- 

 gonium, which would be an acquisition to our gardens." This be 

 named "/*. Rodneyanum in honour of Mrs. Riddell, of Sydney, 

 granddaughter of the famous Rodney." Baron Mueller has 

 figured this species amongst his Victorian plants. Perhaps it may 

 be regarded as one of those plants which had their origin in Africa 

 (a region famous for its Pelargoniums), as Mr. Bentham considered 

 it nearly allied to P. reniforme, Curt., from the southern part of 

 that continent. 



(6) Thomasia quercifolia, J. Gay, with 19 species of the genus 

 is of western origin, and only one species, T. petalocalyx, F.v.M., 

 and that nearly approaching T. angustifolia, Steud., has travelled 

 to S. Australia and Victoria. Of the Sterculiacese, numbering 

 126 species, more than half {^Q) are endemic in W. Australia 

 (Census, F.v.M.), but the following genera are not represented in 

 that region, viz : Sterculia, Tarrietia, Heritiera, Ungeria, Helicteres, 

 Methorium, Melhania, Melochia, Dicaiyidium and Abroma. 



7) Pimelea rosea, R.Br., and P. imbricata, R.Br., with 21 

 other species of the genus, are limited to W. Australia. According 

 to Mr. Bentham, Pimelea occurs only in Australasia; one species, 

 P. longifolia, Banks and Sol., being common to Australia and 

 New Zealand, and 9 others peculiar to the latter. Draj)etes, 

 Wickstroemia and Phaleria do not occur in W. Australia ; but 

 Prapetes is represented in Tasmania and Victoria as well as in 

 New Zealand, whilst the others have species in the Oriental 

 Archipelago, the isles of the Pacific and E. Australia. 



(8) Of the great order Leguminos* comprising 1065 species 

 (Census, F.v.M.) more than a third are endemic in W. Australia, 



