THE HEATHS 239 



abundantly on erect terminal spikes. They are 

 purple or white, and sometimes have both colours 

 in one flower, and the plants continue to produce 

 them from July or August till the frosts come. It is 

 quite as plentiful as the dwarf Heaths. Alba is a 

 white variety. Menziesia polifolia is its former name, 

 and is still found under that title in books. 



The three most suitable Heaths for limestone are 

 Erica carnea, vagans, and mediterranean 



