OF THE INTERIOR OF WESTERN AUSTRALIA. 245 
Hypericum japonicum and Gnaphalium japonicum common to 
temperate Eastern Asia and the desert; it may be added that 
both species extend into New Zealand. A slight connection is 
also shown by the genus Lepidosperma, which has one South 
Chinese species, and by Centrolepis, with one species from 
Cambodia. 
D. Connection with the Mediterranean Region. 
The following short list of species, and to it must be added a 
few introduced plants and some world-wide forms, shows how 
little the desert has in common with the Mediterranean region :— 
Lepidium ruderale, Alyssum linifolium, Lavatera plebeia (near 
L. arborea), Nitraria Schoberi, Echinospermum concavum, Oro- 
banche cernua. With the exception of Lavatera plebeia, all these 
have a wide range of distribution. 
E. Connection with New Zealand. 
The following species are common te the desert and New 
Zealand :— 
Hypericum japonicum, T'illea verticillaris, Tetragonia expansa, 
Senecio lautus, Gnaphalium luteo-album, Gnaphalium japonicum, 
Wahlenbergia gracilis, Thelymitra longifolia, Lemna gibba, Juncus 
bufonius, Scirpus cartilaginevs, Bromus arenarius, Deyeuxia 
Forsteri, Agropyrum scabrum, and the ferns Notholena distans. 
Cheilanthes Sieberi, Gymnogramme Pozvi, and Gymnogramme 
leptophylla. But of these Lemna gibba alone is restricted in 
Australia to the Western Colony, though in all probability it 
will sooner or later be found in the other Colonies. All the above 
have a wide extra-Australian distribution, and, with the exception 
just noted, are also well diffused through Australia. 
F. Connection with South Georgia. 
It would be travelling beyond the scope of this essay were an 
attempt made to trace the relations between the desert flora and 
that of all Antaretic lands. We may, however, take the flora of 
South Georgia* asa type. Of the 11 genera in Professor Engler’s 
list, not one of the 8 of exclusively or predominantly southern 
distribution (Colobanthus, Acena, Rostkovia) is represented in the 
desert. Of the rest, only Juncus, Festuca, and Poa are desert 
genera, and none of the species are common to the two regions. 
* Engler in Bot. Jahrbücher, Bd. vii. p. 251. 
