New Zealand and their Distribution . 279 
Of these 62 genera and 71 species, there do not occur in New Zealand 
at all, in addition to the local endemics of the islands (belonging to genera 
of New Zealand), no less than 8 genera and 8 species, viz. Canavalia obtu- 
sifolia (cosmotropical), Ageratum conyzoides (cosmotropical), Scaevola 
gracilis (Kermadecs only), Aleurites moluccana (trop. Asia), Homalanthus 
polyandrus (Kermadecs only), Boehmeria dealbata (ditto), Panicum san- 
guinale (cosmotropical), Cenchmis calyculatus (Polynesia). Besides these 
there occur in these islands Metrosideros villosa (Polynesia), Coprosma 
petiolata and acutifolia (endemic), Myrsine kermadecensis (ditto), Ipomoea 
biloba (cosmotropical), Ascarina lanceolata (endemic), Cor dy line terminalis 
(Polynesia, Indomalaya), Rhopalostylis Baueri (Norfolk I.), Imperata 
Cheesemanii (endemic), Eleusine indica (trop. Asia), and Poa polyphylla 
(endemic), 10 genera in all with 11 species, the genera, but not the species, 
occurring in New Zealand. 
Now as these species, which do not occur in New Zealand proper, are 
either endemic to the Kermadecs, or common to the Kermadecs and Poly- 
nesia, it would seem probable that the Kermadec Islands received part of 
their flora not by way of New Zealand, but by way of the ridge which runs 
north from these islands to Tonga and Fiji, or at any rate from some part 
of Polynesia. 
Subtracting these from the total of the Kermadec flora leaves only 52 
species found there which actually occur in New Zealand, and it is of 
interest to trace out their distribution there. Twenty-five belong to Class 1 
in order of rarity, ranging New Zealand (including Stewart) from end to end, 
and of these no less than 20 reach the Chathams also, and 5 the Aucklands 
as well. It may be noted that the 5 which have not been recorded from 
the Chathams are Melicytus ramiflorus (tree), Haloragis alata> Tetragonia 
expansa , Apium prostratum , and Agropyrum scabrum (herbs). A further 
13 belong to Class 2, ranging from North Cape to Foveaux Strait, and of 
these only 6 reach the Chathams, a much smaller proportion, corresponding 
to the generally lesser age. With regard to these species, 38 in all, it 
seems to me almost impossible at present to make any safe deductions as to 
whether they reached New Zealand by way of the Kermadecs, or vice versa. 
There remain 14 species with less range, all of which range north- 
wards to North Cape. Several of these belong to genera which are other- 
wise unrepresented in New Zealand, e. g. Piper excelsum (Polynesia, Class 3) 
Corynocarpus laevigata (K. and N. Z. only, Class 4), Oplismenus imdulati- 
folius (K. and N.Z. only, Class 4), Sicyos angulata (Polynesia, Class 5). 
Acianthns Sinclairii (K. and N. Z. only, genus New Caled., Class 5), 
Rhagodia nutans (Australia, Class 6), Siegesbeckia orientalis and Bidens 
pilosa (palaeotropical, Class 7), Peperomia Endlicheri (Lord Howe Island, 
Norfolk Island, Class 7). These species it would seem justifiable to regard as 
having entered New Zealand by way of the Kermadecs. 
