CH. m] Distribution 27 



Some species are confined to dry, stony situations, waysides, 

 and rocky places, e.g. Festuca Myurus, Hordeum murinum, 

 Poa rigida, Poa compressa, etc., and will not fit well into any of 

 the preceding groups. Others, like Crested Dog's-tail and 

 Yellow Oat-grass, though usually abundant on dry chalky soils, 

 will thrive equally well on moister clay soils. Other species, 

 e.g. Agrostis canina and A. setacea, will thrive on most dry soils 

 whether either sand or chalk predominates. 



The above lists contain several species which are either 

 uncommon or rare. They are only mentioned here on account 

 of their value as "Indicator plants." 



In our old pastures and meadows it is obvious that the grass 

 flora must vary considerably with the nature of the soil, manuring, 

 kind of grazing, etc. It is nevertheless true that some species 

 tend to predominate on land which is always grazed, while others 

 are more typical of land on which hay crops are usually grown. 

 The following lists may be taken as indicating in a general way 

 those species which are most abundant on each of these two kinds 

 of grass land. 



Grasses generally most abundant on old pastures. 

 Lolium perenne \ 



Agrostis alba var. stolonifera Especially on low- 

 Holcus lanatus ty m g rich grazing 



Poa trivialis 



land. 



Festuca rubra 

 F. duriuscula 

 Avena flavescens 

 Cynosurus cristatus | Especially on higher or drier 

 Festuca ovina grazing land. 



Agrostis vulgaris j 



Poa pratensis 



and to a less extent on medium or good soils : 

 Dactylis glomerata. 

 Phleum pratense. 

 Alopecurus pratensis. 

 Poa annua. 



Typical grasses of Meadow Land. 

 Dactylis glomerata. 



