143 
A CONTRIBUTION TOWARDS THE AUHN FI.ORA 
OF IREIyAND. 
BY M. C. KNOWI.KS. 
Whii^st English, and more particularly Scotch botanists, 
have been paying attention of late years to the numerous 
foreign plants that are introduced into these countries by the 
importation of foreign grain and in other ways, in Ireland, so 
far as I have been able to find out, very little has been done in 
this matter. 
Occasionally isolated but obtrusive visitors, such as Crepis 
bie7inis, Maf7icaria discoidea^ Linaria viscida, and others, have 
made themselves so much at home, and have so evidently 
come to stay, that we have been obliged to take note of them ; 
but of the fluctuating sets of foreign plants that spring up 
around flour mills, in the neighbourhood of distilleries, docks, 
and on hen-runs, very few lists have been published. Two 
lists, one of some fifty plants collected by Mr. Richard Hanna 
in the neighbourhood of the Belfast Distillery, and the other, 
a smaller one, from Greenisland, collected by Mrs. White 
Spunner, are given in the * Supplement to the Flora of the N.E. 
of Ireland.' These, together with a number of aliens from the 
docks and Gary's Road quarry, Limerick, mentioned in Mr, 
Praeger's paper " Notes on the lyimerick Flora"^ ; a number 
of additions from these same places collected two years later 
by Mr. R. D. O'Brien, and recorded in my paper *' Additions 
to the Flora of Co. Limerick ; Mr. Scully's short list from a 
rubbish heap beside the River Lee in the city of Cork^ ; and 
Notes on some casuals in Co. Antrim" by Mr. J. H. Davies^, 
sum up all the published matter I can find. Yet, as some of 
these foreigners may in time become more or less permanent 
members of our flora, it seems desirable that the date of their 
^ I.N., vol. ix., p. 260. 
* I.N,, vol. xii., p. 249. 
^ I,N., vol. iv., p. 20. 
* I.N., vol. v., p. 309. 
