320 Transactions.— Botany. 
country.” This is highly inaccurate and misleading. I have already stated 
that in the North Island the plant exists under the same circumstances as 
those which surround it in the British Islands, manifesting a decided 
preference for cultivated land, but found also in widely different situations, on 
mountains and in forests. When the Thames gold-field was first opened, 
before tracks had been made to any great extent, it was to be seen sparingly 
in the wildest and most untrodden spots up to 1,900 feet, exactly under 
similar cireumstances to those under which it occurs in the centre of the 
island, where I had the pleasnre of collecting it last summer, and I may state 
that I have received specimens of the var. dryandri, collected with Veronica 
tetragona and other sub-alpine plants on the all but untrodden slopes of 
Ruapehu and Tongariro by my valued friend, Captain Gilbert Mair. 
Mr. Travers’ opinion respecting the introduction of Azolla rubra will not 
be generally accepted unless supported by stronger evidence. I shall peruse 
with interest anything he can offer in support of his theory. 
Art. XLI.—WNotes on the Naturalized Plants of the Chatham Islands. 
By T. Keg, FELS. 
[Read before the Auckland Institute, 17th August, 1872.] 
IsoaTeD localities offer peculiar facilities for studying the diffusion of intro- 
duced plants, and ascertaining their effects in the displacement of native 
species. In the Chatham Islands this process possesses unusual interest, 
arising from the striking peculiarities exhibited by the indigenous flora. 
The following enumeration of the naturalized plants of this interesting 
group has been prepared from a packet of dried specimens collected by Mr. 
H. H. Travers during his recent visit, and kindly communicated by him, 
together with valuable notes on their relative abundance and diffusion. 
From the great distance of these islands from the main land and the com- 
paratively limited amount of intercourse that has taken place, only a small 
number of species has become naturalized, as will be seen from the appended 
list. All the species are amongst the common naturalized plants of the 
colony ; but on the other hand the absence of N; asturtium officinale, Senebiera 
pinnatifida, Erodium cicutarium, Æ. moschatum, Erigeron canadensis, Ery- 
