145 



passing over the boundary, and two — Lasiopetalum discolor and 

 Trachymene heterophylla — common to Western Australia, South 

 Australia and Tasmania. 



Thus Kangaroo Island, occupying a median position between 

 the western and eastern phytogeographic regions, partakes a 

 little of the character of each mingled with South Australian 

 plants. 



The affinity of the flora of Kangaroo Island with that of 

 South Australia is strongly shown by the presence of Ptilotus 

 JBeckeri, Correa decicmhens, Dodoncsa Jiumilis, PuUencea acerom. 

 Acacia dodonceifolia, Darivinia micropetala, JEucalyptus cosmo- 

 pJiylla, Gryptandra spathulata, Sccevola linearis, JSremophila 

 Behriana, Styphelia patula, S. concurva, Xanthorrlioea qiiadrangu- 

 lata, Schoenus Tepperi, fourteen in all. These and the restricted 

 species make up a total of 25 peculiarly South Australian, 

 which occur on the island. 



COMPAEISOX OF THE FlOEA WITH THAT OF SoUTH AUSTRALIA. 



The greatest similarity subsists between the florula of Kan- 

 garoo Island and that of the elevated tracts of the Adelaide 

 chain, and more particularly with that of the region about the 

 source affluents of the Hivers Finniss and Hindmarsh. Here 

 at elevations of from 800 to 1,000 feet are extensive peaty 

 morasses — such as the Square Waterhole, Black and Hungry 

 Swamps, embayed amidst a range of hills attaining to about 

 2,000 feet elevation. Much of the lower slope of the range is 

 clothed with a thicket of heathy plants and shrubs, whilst the 

 higher parts are covered with stringybark forests. Like Kan- 

 garoo Island, this region is rich in south-eastern species, many 

 of which do not cross the summit of the Adelaide chain. The 

 general aspect of the vegetation is the same, and though many 

 of the characteristic plants are in common, yet not a few are 

 representative and not identical. Such are — 



Mount Lofty JRange. Kangaroo Island. 



Adenanthos sericeus A. terminalis 



Correa speciosa (typica) C. speciosa (glabra) 



Prostanthera Behriana P. coccinea 



Xanthorrhoea semiplana X. quadrangulata 



Spyridium obovatum S. halmaturinum 



Melaleuca squamea M. squarrosa 



Eucalyptus Gunnii E. corynocalyx 



The arboreous and shrubby vegetation of the wet heathy 

 ground is the same in each : — Eucalyptus capitellata, E. cos- 

 mophylla, Acacia retinodes, Casuarina distyla, JBanksiaSj 

 Adenanthos terminalis, I^hyllota pleurandroides, Spyridium 

 spathulatum, and species of Styphelia ; whilst among humbler 



