282 Willis. — The Floras of ihe Outlying Islands of 
Table XV. 
100 m. 
-200 
-300 
-400 
-5°° 
-600 
-700 
-800 
-900 
-1000 
-1080 
Wides reaching islands 
21 
21 
23 
23 
24 
26 
26 
26 
26 
29 
26 
Wides (N.Z. only) 
Endemic N.Z. and 
7i 
68 
85 
84 
83 
80 
76 
69 
62 
56 
27 
islands 
22 
22 
23 
25 
27 
3i 
3i 
30 
3i 
3i 
30 
Endemic N.Z. only 
56 
63 
71 
81 
80 
100 
98 
98 
I0 4 
86 
39 
170 
174 
202 
213 
214 
237 
231 
223 
223 
202 
122 
It is clear that the centre of the Monocotyledons as a whole is in the 
South Island. But the numbers do not run with perfect regularity to 
a maximum at one zone, and this leads one to suspect, what indeed seems 
probable when one realizes (10, p. 355 seq.) that there have been at least 
two invasions of New Zealand, that the group really entered partly in one, 
partly in the other, invasion. The southern invasion of Monocotyledons 
was, as we shall see, so much the larger that its figures all but swamp those 
of the northern. 
If we how examine the Monocotyledons genus by genus, we soon find 
that they divide into two main groups, one commencing at the north end of 
New Zealand and ranging to a greater or less distance south, the other com- 
mencing at the south end and ranging to a greater or less distance north. 
It is very striking how few species there are which have intermediate 
ranges, among the wides — the endemics of course have r every possible 
range. The only wides that do not reach one or the other end of the two 
main islands of New Zealand are given in the table below (I have counted 
those wides that only reach the southern end of the narrow peninsula at the 
extreme north as reaching the north end of New Zealand, this peninsula 
being so entirely different from the rest of the country, and so small 
in area). 
Table XVI. 
Prasophyllum rufum 
Pterostylis mutica 
Hypoxis pusilla 
Juncus scheuchzerioides 
Triglochin palustre 
Potamogeton palustre 
Zannichellia palustris 
Lepilaena Preissii 
Centrolepis strigosa 
Lepyrodia Traversii 
Eleocharis acicularis 
A mere glance at this list, for any one who is familiar with Cheeseman’s 
Flora, is sufficient to show that it includes, as is usual in lists of species that 
behave irregularly (as regarded from the point of view of age and area), the 
bulk of the doubtful determinations, species of possible recent introduction, 
&c. The three orchids might possibly have been brought by the aid of the 
wind in comparatively recent times. There are only perhaps 8 of the 21 
Uncinia Sinclairii 
tenella 
Carex acicularis 
lagopina 
leporina 
Brownii 
Imperata arundinacea 
Stipa setacea 
Alopecurus geniculatus 
Agrostis parviflora 
