270 
Willis . — The Floras of the Outlying Islands of 
Table II ( continued ). 
Fain. 
Spp. in Stewart 
Fam. 
Spp. in Stewart 
Island. 
Island. 
Boraginaceae 
3 
A C 
Loranthaceae 
\ 

Convolvulaceae 
3 
C K 
Euphorbiaceae 
1 
C IC 
Solanaceae 
C K 
Urticaceae 
1 
A C K 
Scrophulariaceae 
13 
A C IC 
Orchidaceae 
21 
A C IC 
Myoporaceae 
C IC 
Iridaceae 
2 
C 
Lentibulariaceae 
1 
— 
Liliaceae 
12 
A C K 
Labiatae 
1 
c 
Juncaceae 
8 
A C 
Plantaginaceae 
3 
A 
Palmae 
— 
C K 
Ulecebraceae 
1 
— 
Typhaceae 
— 
IC 
Chenopodiaceae 
2 
C K 
Naiadaceae 
4 
C 
Polygon aceae 
3 
A C IC 
Centrolepidaceae 2 
A 
Piperaceae 
C K 
Restionaceae 
2 
C 
Chloranthaceae 
1 
K 
Cyperaceae 
44 
A C K 
Thymelaeaceae 
3 
C 
Gramineae 
35 
A C IC 
Thus of the 
60 Stewart families, 49 (or 81 per 
cent.) occur in 
other islands, while of the 31 families that occur in New Zealand and 
do not occur in Stewart, only 10 (or 32 per cent.) occur in the islands. 
Of these 10, Rutaceae, Rhamnaceae, Anacardiaceae, Cucurbitaceae, Myo- 
poraceae, Piperaceae, Palmae, and Typhaceae, are enumerated in the 
list of the northern invasion given on p. 356 of 10 , and Solanaceae is 
given as probably belonging to that invasion, so that only Leguminosae 
remains. This is represented in the Kermadecs by Canavalia , a genus 
that does not occur in New Zealand, and in the Chathams by Sophora 
tetraptera , a species which should in all probability be found on Stewart. 
It is thus clear that the prophecy made above is borne out by the 
facts. A mere glance at the table suffices to show how many of the families 
occur in two or more groups of islands, and we have seen that most of them 
also occur in Stewart. 
(3) As we have already seen, in dealing with Stewart Island, the 
largest families (in a given country) will on the whole be the oldest (in 
that country). We may therefore predict that the families that reach all 
three groups of islands will on the whole be the largest, both in New 
Zealand as a whole, and in Stewart. Those reaching two groups will be 
next in size, and then will follow those reaching only one, and those reaching 
none. An examination of the facts gives us 
Table III. 
Reaching ' The families contain (in New Zealand as a whole), 
3 islands. 221, 119, 113, 113, 6r, 57, 47, 22, 22, 20, 19, 17, 17, || 11, 11, 9, 8, 8, 1. 
3 » 5°j 3L 31, 26, 25, 25, 20, 17, || 15, 12, 10, 10, 5, 4, 3, 3, 2, 2, 1 , 1. 
1 island. 19, || 15, 13, 7, 7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 2,. 2, 2, 2, r, 1. 
No islands. || 10, 8, 6 , 6 , 6, 6, 4, 4, 4, 4. 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1. 
The mark || is placed at the position of the average size of family in New Zealand (15-2 species). 
A similar comparison for Stewart Island shows that the size of the 
families in that island, according to the number of groups they reach, is : 
