308 GENERAL REMARKS. 



2. Introduced by the Agriculturist or Planter. 



Acer campestre. Populus alba. 



Pseudo-platanus. nigra. 



Brassica napus. Primus cerasus. 



rapa. Salix alba. 



Carpinus betula. Forsteriana. 



Fagus castanea. Russelliana. 



sylvatica. Smithiana. 



Humulus lupulus. Taxtis baccata ? 



f Linum usitatissimum. Tilia europsea. 



Medicago sativa. grandifolia. 



Pinus sylvestris. 



3. Weeds. 



Agrostemma Githago. Papaver argemone. 



Avena fatua. dubium. 



Chrysanthemum segetum. rhceas. 



Centaurea cyanus. Ranunculus arvensis. 



Fumaria officinalis *. Raphanis raphanistrum. 



f Lolium arvense. Veronica filiformis. 



-J- temulentum. 



Of our wild plants, the Statice limonium, Convallaria polygona- 

 tum, Picris echioides, and Sisymbrium Irio y reach their most northern 

 limits in N. Durham or in the liberties of Berwick; and Dunglass 

 Den appears to be the only station in Scotland for Viburnum Ian- 

 tana. The Ligusticum scoticum^ on the contrary, the Sympliytum 

 tuberosum, and the Cornus suecica, are scarcely to be found further 

 south, and when they do occur it is in sparing quantities. For 

 the Salvia verbenaca we have three habitats in N. Durham, but 

 in Scotland it is said to grow only in the vicinity of Edinburgh. 

 The Scilla verna, until detected by Mr BAIRD on the coast of 

 Berwickshire, was presumed to be ; a peculiar ornament of the 

 western coasts ; Rhodiola rosea has not previously been found, in 



* F. officinalis," in arvis agris vineis oleraceis orbis fere totius, verosimiliter 

 ex Oriente aut Graecia orta, in Europa aevo Gessneri rarissima nunc vulgatissima, 

 in America boreali et meridional!, et ad Caput Bonae Spei forsan cum cerealihus 

 aut oleribus introducta." DBCANDOLLE, Syst. Veg. ii. 135, 



