Il] INDICATOR-PLANTS 31 



P. Bcehmeri (Eastern counties, rare). 



P. asperum „ „ „ 



Phalaris canariensis (rare weed). 



Alopeourus alpinus (Highlands). 



Mibora vema (Anglesea and Channel Islands). 



Lagiifus ovaius (Suffolk coasts). 



Pob/pogon monspeliensis (rare, in S. England near sea). 



P. littoralis (salt marshes S. England). 



Agrostis setacea (dry heaths of S. Wales). 



A. Spica-venti (sandy fields of E. counties). 



Oasiridium lendigemm (fields and waste places in S. Wales 

 and Norfolk). 



Calamagrostis Epigeios (moist glades &o. in Scotland). 



C. lanceolata (moist shades, scattered in England). 



C. stricta (bogs, &c., very rare). 



Cyiiodon Dactylon (waste and cultivated lands near sea in Soot- 

 land). 



Spartina striata (salt marshes S. and E. coast). 



Leptwrus incwrvatus (scattered on shores). 



Bromus maximus (Jersey). 



B. madritensis (roads and waste, Scotland and Tipperary). 

 B.' inermis (introduced from Hungary). 



Loliu'/n italicum (introduced from Lombardy). 



Festuca uniglumis (Irish and S.E. coast). 



Poa procumbens (waste ground near sea). 



P. loUacea (sandy sea-shores). 



P. laxa (Ben Nevis, &c.). 



P. alpina (Highlands and N.). 



Catabrosa aquatica (shallow pools and ditches, scattered). 



Finally, a few words may be said on a subject still 

 in its infancy — that of Indicator-plants. In many cases 

 certain plants are found so confined to certain classes of 

 soil, that foresters and agriculturists have claimed to be 

 able to infer from their presence the presence or absence 

 of certain chemical or other constituents of soils : on the 

 contrary we find other plants so universally distributed 



