The Rock Roses . 



flowers have a big yellow blotch at the base of each 

 petal. 



Many other species and hybrids, desirable and hand- 

 some, might be enumerated ; but with a passing reference 

 to the Poplar-leaved Cistus, C. populifolius, which has 

 long-stalked, poplar-like leaves, unlike any others of the 

 genus, and white-yellow, spotted flowers, their enumera- 

 tion can be carried no farther here. 



Soil and Cultivation. A warm, dry situation and 

 the sun are imperative to all Cistuses, and they prefer a 

 light soil. In specially severe winters they may be pre- 

 served by covering them with bracken or leaves. They 

 are usually propagated by cuttings (this is, of course, the 

 only way in the case of hybrids) struck in mild heat. 

 They will not bear transplanting after they have been 

 once planted out. 



199 



