192 ALIEN FLORA OF BRITAIN 



[Bromus sterilis, L. The book records of this species- 

 would lead one to suppose that, at any rate in most 

 counties, it is exclusively a weed of waste ground 

 and cultivated fields. It is certainly much more 

 frequently met with in such situations, but it is also' 

 an undoubted native in dry broken ground.] 



Bromus tectorum, L. A native of dry places in. 

 Europe, Siberia, and Northern Africa. Also a somewhat 

 common weed of dry waste ground in the same regions.. 

 It becomes scarcer and less permanent northwards- 

 in Europe, and in England it is seldom better than 

 a casual, introduced with grain, agricultural seed, and. 

 other kinds of merchandise. 



Bromus unioloides, H. B. and K. A grass of very- 

 wide distribution in tropical, sub-tropical, and even 

 temperate regions, having been long used as a fodder 

 crop. As such its seed has been recently on sale- 

 in Britain. Its few records as sub-spontaneous pointy 

 however, rather to its importation with foreign* 

 grain. 



Calamagrostis sylvatica, Bess. A widely distributed 

 native of woods and pastures in the mountains of 

 Central and Southern Europe and the East. It is cul- 

 tivated in English gardens, and is on record as a casual- 

 Doubtless of garden origin. 



Chloris radicata, Sw. Native of the savannahs of" 

 tropical America, and of wider distribution as a road- 

 side weed. Recorded in the Botanical Record Club 

 Report for 1875 by Mr. J. Whitehead as a casual near 

 Chester. 



