OF THE INTERIOR OF WESTERN AUSTRALIA. 233 
distributed in Australia, but absent from the S.W. corner. 
Reported from the Barrow Range, at the eastern limit of 
the W. Australian desert. 
6. Acanthacee. Represented by two species which advance 
no further south than the Ashburton. 
7. Nyetagine@. Of Boerhanvia diffusa, found all over Australia 
including the S.W. corner, I find no record from the 
desert south of 30°. Most probably it has been over- 
looked. 
8. Fluviales. One representative found in extratropical 
Australia, including the S.W. corner. 
I find no desert records north of 30° in respect of the following 
orders :— 
1. Dilleniacee. Probably overlooked. A thorough exami- 
nation of the Murchison district would probably bring to 
light some members of this order. 
Tremandree. 
Geraniacee. Probably overlooked. 
. Loganiacee. Ditto. 
Gentiane@. Represented by one species of wide distribution. 
A probable oversight. 
6. Orobanchee. One widely distributed species. 
7. Iridee. One genus (Patersonia); but inasmuch as this is 
also known from Borneo, it should be found in the desert 
N. of 30°. 
8. Centrolepide. Probably overlooked. 
Of the 180 exotie * genera :— 
154 are the more widely distributed outside Australia, 
4 [Eriostemon, Duboisia, Xerotes, Grevillea (which is in New 
Guinea as well) are common to Australia and New 
Caledonia. 
3 [Styphelia, Banksia, Kennedya] are common to Australia 
and New Guinea. 
13 [Phebalium, Plagianthus, Swainsona,Clianthus, Pomaderris, 
Brachycome (also in S. Africa), Olearia, Logania, Pimelea, 
Persoonia, Fusanus,  Pterostylis, Arthropodium] are 
common to Australia and New Zealand. 
nt opo ro 
* This term is applied simply to genera and species occurring in Australia 
and beyond its borders, and without any implication as to an assumed place of 
origin. 
