244 MR. S. MOORE ON THE FLORA 
gracilis, Evolvulus linifolius, and Euzxolus interruptus. Of 
these: 
3 are not found in the South-west corner, one of them (Evol- 
vulus linifolins) being of wide extra-Australian distribution ; 
while Eucalyptus terminalis aud Euxolus interruptus, which do 
not extend beyond New Guinea, only reach the northern and 
eastern outskirts of the desert. "The rest are widely distributed 
plants. 
Indigofera linifolia, a species widely diffused in Australia, is 
the only one, so far as I have been able to find out, which is 
common to New Guinea and Australia, including the South- 
west corner, yet is not known to oceur in the intervening desert. 
B. The Connection with Africa is shown by citations like 
the following. 
Hibbertia has two Madagascar species, 
Keraudrenia has one species in Madagascar; it is allied to a 
Queensland one. 
Zygophyllum. Australia and the Cape are the headquarters 
of this genus, which is well represented in the desert. 
Aizoon, essentially an African geuus, is represented in the 
desert by a species nearly allied to one from South Africa, and 
the same remark applies to Mesembryanthemum. 
Helipterum is an Australian and South African genus, 
Brachycome has one species in South Africa. 
Athrixia is common to Australia, Madagascar, and South 
Africa, 
Cryptostemma calendulacea is an introduced South African 
plant. 
Anguillaria is a genus closely allied to, and by some considered 
to be rightly merged in, the South African Wurmbsea. 
Cesia is a small African and Australian genus. 
Scirpus cartilagineus occurs also in South Africa [and New 
Zealand]; Scirpus cernuus is an extratropieal Worid form ; while 
Sporobolus virginicus and Anthistiria ciliata are grasses of wide 
distribution, including Africa in their range. 
C. Connection with Eastern Asia and Japan. 
This connection is but slight, as, exclusive of world-wide 
species or species of generally wide distribution, I Bud only 
