LAWNS AND GRASS PLOTS 173 



weather, the most approved mixture for town 

 gardens being about equal proportions of the 

 following : Agrostis (species), Cynosurus cris- 

 tatus, Festuca duriuscula, Poa pratensis, Short 

 Perennial Rye grass. 



YARROW (Achillea Millefoliuin) thrives re- 

 markably well in London, but has the probable 

 disadvantage that being of strong growth it 

 ousts out all other grass from the soil in which 

 it is growing. A remarkable instance of this 

 occurred last year at the British Museum, 

 where the two plots of grass in front of this 

 building were quite overrun by the Yarrow and 

 the original grasses nearly all killed out. So 

 thoroughly did the Yarrow overrun the ground 

 that no less than three cartloads of the roots 

 were removed before the ground was returfed. 

 For dry banks, and especially where it can be 

 allowed to flower, it is probably the best plant 

 for smoky localities. The ANNUAL POA (P. 

 annua) is another excellent grass for the 

 London garden, particularly beneath trees, 

 where it reproduces itself abundantly. Though 

 hardly suitable for lawns, yet for odd corners 



