Tate— Ox the Floras of Norfolk and Lord Flowe Islands. 209 
monotypic and belongs to New Zealand. Cénostzgma has, besides the Lord Howe 
Island plant, some species in the Samoa Islands. Yedyscepe and Ffowea, dismembered 
from Kentza, are endemic. 
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Australasian Genera.—Of the twenty-nine genera in this category, the following 
five do not extend to New Zealand :—Zaloghia, Scaevola, Ochrosia, Lyonsia and 
Gertonoplestum. Fourteen occur also in Norfolk Island, so that their relationships 
need not be repeated; of the remainder, Dodonea, Leptospermum, Pimelea, Brachy- 
come, Cassinia, and Evechthites exhibit an Australian facies, whilst Dracophyllum 
and Uzcznza are characteristic of New Zealand. 
The affinities of Lagunaria have already been discussed; whilst the genera 
Rhagodia, Melaleuca and Westvingia are represented each by one species of conti- 
nental origin. 
Affinities with Norfolk [sland.—The number of genera in Norfolk Island is 75, 
of which 53, or 70 per cent., are common to Lord Howe Island; of the remainder, 
Melicytus, Meryta, Phormium and Rhopalostyfis attain their most northern and 
western limits in Norfolk Island; whilst Avzostemon and Roronta of Australian 
origin, Vola and Osmunda of cosmopolitan range, Adutilon, Bryonopsis, Melothria, 
Melodinus, Freycinetia and Cordyline of Oriental origin, Boszstoa, Pseudomorus, 
Pennantia and Araucaria of Polynesian origin seem to have missed Lord Howe 
Island in their respective lines of diffusion; the extension of Procrzs from the Indo- 
Malay region through Papua to Norfolk Island and Polynesia marks its southern 
limit. Excepting Procris and the first three of the above-named genera, all may 
reasonably be expected to occur in Lord Howe Island; these would bring the 
nominal number of genera common to the two insular floras to 67 or 90 per cent. 
Concluston.—Though there is a large number of New Zealand genera in the 
Lord Howe Island flora, yet the Australian forms preponderate ; nevertheless it 
must be borne in mind that, whereas in Norfolk Island the majority of the more 
or less abundant genera in Australia are there represented by endemic species, in 
Lord Howe Island they are represented for the most part by continental species. 
One is tempted to suggest a modern immigration of Australian species which has 
dimmed the lustre of the original flora, as has been the case in a less marked degree 
in New Zealand. 
Keeping in view the large community of genera between Lord Howe and 
Norfolk Islands, the former cannot be detached as a separate botanic region from 
the latter. 
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