12 The Scottish Naturalist. 



lized plant. There is no doubt that plants introduced by farmers, 

 gardeners, or manufacturers, do, as it is called, establish them- 

 selves ; but then it is usually only for a time, and that often a 

 short time : they are simply casuals, and have no right in our 

 lists. There are many plants which are now only found upon 

 cultivated ground (i.e., ground from which the natural herbage 

 lias been removed), which may possibly, or even probably, have 

 been introduced at some very distant period, but which now we 

 cannot, and, as I think, ought not, to distinguish from those of 

 so much earlier arrival in Britain, which we justly call natives. In 

 deference to the ideas of the late Mr. Watson I have marked most 

 of the Poppies as "possibly introduced." They are not usually 

 observed off cultivated land, but they may sometimes be found on 

 bare spots which have not been subjected to cultivation. 



It is most interesting to trace, as far as we can, the time and 

 manner of introduction. Where did the Poppies come from? 

 They surely preceded cultivation somewhere. But that is a very 

 distant time ; for even in Britain cultivation of corn preceded the 

 Christian Era. 



THE BOTANICAL WORK OF GEORGE DON OP FORFAR. 

 By G. C. DRUCE, F.L.S. 



( Continued from page 26 1 . ) 



Fourthly — Plants which there is less probability of our again 

 finding, but which still may be sought for with a chance of success. 

 These are : — 



Ranunculus alpestris. 



Arabis eiliata. 



Silene alpestris. 



Arenaria fastigiata. 



Stellaria scapigera. 



Potentilla intermedia. 



Saxifraga pedatifida. 



Eriophorum capiiatum. 



Thleum Michelii. 

 There are others which, if correctly reported by him, probably 

 from drainage or cultivation, have been extirpated. Such are : — 



C rep is pulchra. 



Eriophorum alpinum. 



Calamagrosiis stricta. 



