176 PERFOLIATE YELLOW WOUT. 



stems are thickly covered with that pale sea- 

 green bloom, which, like the grey powder on 

 the plum, may be rubbed off by the finger ; 

 the plant too is remarkably subject to attacks 

 of mildew. It is about a foot high, and is 

 a common flower on chalky hilly places in 

 the middle and south of England, and grows 

 well near the sea, as on the cliffs at Dover, 

 where it is remarkably abundant and luxu- 

 riant. It is not common in Scotland, though 

 found on the chalky lands of almost all the 

 countries of Europe. 



The genus Chlora was thus named from the 

 Greek word yeJloio, from the colour of its 

 flowers. It is intensely bitter, and belongs to 

 the same natural order as the Gentians. The 

 bitter prhiciple exists in a greater or less degree 

 in all these Gentianese, and is tonic in its nature; 

 that of the Chlora, though not so powerful as 

 in the Gentian, may be used medicinally in the 

 same cases as those in which the latter plant 

 would be employed. 



