COEOLLIFLOR-E. 



191 



9. ERICACEAE (Calluna vulgaris) Heather. 

 (Erica cinerea) Grey Heath. 



The Heaths are, for the most 

 part, social plants, growing in 

 great numbers on waste ground, 

 and giving great beauty to 

 scenery. The Heather gives a 

 peculiar aspect to the hills of 

 Scotland. Humboldt observes, 

 "It is curious that, out of 

 more than 300 species of Erica, 

 -one only should be found 

 throughout the whole American 



continent." 



Grey Heath. 



1C. GENTIANACE^E (Gentiana campestris) Field Gentian. 

 (Menyanthes trifoliata) Buck Bean. 



This order contains no member of great importance ; the 



Field Gentian. 



Buck Bean. 



Gentian-root, much used as a tonic, is the product of 

 the " Gentiana Lutea." 



