chap, xxii.] THE FLORA OF NEW ZEALAND. 
459 
are also Antarctic, South American, or European ; so that there 
are only about 100 species absolutely confined to New Zealand 
and Australia, and, what is important as indicating a somewhat 
recent immigration, only six of these belong to genercc which 
are peculiar to the two countries, and hardly any to the larger 
and more important Australian genera. Many, too, are rare 
species in both countries and are often alpines. 
Far more important are the relations of the genera and 
families of the two countries. All the Natural Orders of New 
Zealand are found in Australia except three — Coriarise, a 
widely-scattered group found in South Europe, the Himalayas, 
and the Andes ; Escalloniese, a widely distributed group ; and 
Chloranthacese, found in Tropical Asia, Japan, Polynesia, 
and South America. Out of a total of 303 New Zealand 
genera, no less than 251 are Australian, and sixty of these are 
almost peculiar to the two countries, only thirty-two however 
being absolutely confined to them. In the three large orders— 
OomposittB, Orchideae, and Gramineae, the genera are almost 
identical in the two countries, while the species — in the two 
former especially — are mostly distinct. 
Here then we have apparently a wonderful resemblance 
between the New Zealand flora and that of Australia, indicated 
by. more than two- thirds of the non-peculiar species, and more 
than nine-tenths of the non-peculiar genera (255) being 
Australian. But now let us look at the other side of the 
question. 
There are in Australia seven great genera of plants, each 
containing more than 100 species, all widely spread over the 
country, and all highly characteristic Australian forms, Acacia , 
Eucalyptus , Melaleuca , Leucopogon , Stylidium, Grevillea, and 
Hakea. These are entirely absent from New Zealand, except 
one species of Leucopogon , a genus which also has representatives 
in the Malayan and Pacific Islands. Sixteen more Australian 
genera have over fifty species each, and of these eight are totally 
absent from New Zealand, five are represented by one or two 
species, and only two are fairly represented ; but these two — 
Eroscra and Helichrysum , are very widespread genera, and might 
have reached New Zealand from other countries than Australia. 
