Phy to geography of the Southwestern Pacific 191 



immigrants, but old inhabitants of the continent. They belong 

 to the Autochthonian element of the Australian flora. Their ex- 

 istence proves that the Autochthonian flora included members 

 of groups which, at the present day, are distributed principally 

 in the southern hemisphere, but it is impossible to infer that they 

 originated in the south. 



A great many genera of the Autochthonian element of the 

 flora of Australia (often including New Guinea, Melanesia, and 

 New Zealand) do not display any clear affinities, namely : 



Tremandraceae 



Liliaceae § Johnsonieae 

 Liliaceae § Lomandreae 

 Liliaceae § Calectasieae 

 Liliaceae genus Hewardia 

 Haemodoraceae genus Haemo- 



Euphorbiaceae § Stenolobeae 

 Sapindaceae § Dodonaeaceae 

 Stackhousiaceae 

 Thymelaeaceae genus Pimelea 



dorum 

 Amaryllidaceae § Conostylideae Passiflora § Disemma 

 Amaryllidaceae genus Campy- Myrtaceae § Chamaelaucieae 



nema 

 Orchidaceae § Diurideae 



Santalaceae § Anthoboleae 

 Proteaceae § Persoonioideae 



*Balanops 



*Eupomatia 



*Himantandra 



Halorrhagaceae genus Hal- 



orrhagis 

 Umbelliferae § Xanthosiinae 

 Epacridaceae 



Scrophulariaceae genus Duboisia 

 Scrophulariaceae genus Antho- 



cercis 

 Labiatae § Prostantheroideae 



Saxifragaceae genus Eremosyne Rubiaceae genus Opercularia 

 Saxif ragaceae genus Tetracar- Goodeniaceae 



paea 

 Saxifragaceae genus Bauera 



*Byblis 

 Rosaceae genus Stylobasium 

 Leguminosae § Podalyrieae 



*Cephalotus 



Stylidiaceae 



Compositae genus Olearia 

 Compositae genus Calotis 

 Compositae genus Lagenophora 

 Compositae genus Brachycome 

 Compositae § Angiantheae 



