Marcu 1909. | BOTANICAL SOCIETY OF EDINBURGH 39 
of Australia, New Zealand, and South America flourish 
together for some distance below the manufacturing towns. 
In favourable summers like that of last year some of these 
plants may be selfsown, but as a rule these aliens die down 
annually and the supply is kept up by the introduction of 
fresh seed. Possibly some may be naturalised in process 
of time. In any case it can hardly fail to be of interest to 
place on record a list of aliens recently found on the banks 
of the Tweed. 
During last year the writer has collected frequently on 
the banks of the Tweed and its tributaries, on some occasions 
with the assistance of Mr. James Fraser. In all 159 spp. 
have been found: 9 are new to Britain—6 having already 
been exhibited ! to the Society, while 3 have been noticed by 
Mr. Fraser in the “ Annals of Scot. Nat. Hist.,” Jan. 1909, 
p. 40 ff The others are included either in Druce’s “ List 
of British Plants,’ or in Dunn’s “Alien Flora of Great 
Britain.” 
Below there is given a list of some previous notices of 
alien plants from Tweedside :— 
1829. “Flora of Berwick-on-Tweed.” Dr. Geo. Johnston. Includes 6 
of the spp. now recorded. 
1869. “ Proc. Berwick Nat. Club.” Stuart. 14 from Tweed and Gala. 
1872. Ibid. ‘“‘Tweedside Plants of Recent Introduction.” Brother- 
ston. (18.) 
1876 Ibid. Rev. Jas. Farquharson, M.A., in “ List of Flowering Plants 
and Ferns observed in Selkirkshire,” gives 8 aliens, 
1902. “Lauder and Lauderdale.” Thomson. In the list of plants by 
Kelly and Shaw are 16 aliens. 
1903. “Trans. Bot. Soc. Edin.” Trail refers to 25 species. 
1905. “Ann. Seot. Nat. Hist.” Druce notes 5 near Melrose. 
Of course the same plants figure often more than once in 
the above lists. After making all deductions, one finds that 
68 of the species now enumerated have not been previously 
recorded from “ Tweed.” 
For the identification of Atriplex spongiosa, F. von Muell, 
I am indebted to Professor Bayley Balfour, F.R.S., F.LS. 
My best thanks are also due to Mr. James Fraser, who has 
gone over the ground with me on several occasions. I have 
also to thank the authorities of the Herbaria at Kew, South 
Kensington, and Cambridge, for determining some of the 
1 See Proceedings for 12th November of present issue (p. iii.). 
