74 



CISTACEJ3. 



which is not uncommon in gardens, is occasionally found 

 in waste places, but has little claim to be considered a 

 native. It may be distinguished by the glaucous hue 

 of its pinnate leaves, and by its 5 -cleft flowers. 



ORD. VIII. CISTACE.E. THE EOCK-EOSE TRIBE. 

 Sepals 5, unequal, the three inner twisted in the 

 bud ; petals 5, twisted, when in bud, in a direction con- 



HELIANTHEMUM VULGAR^ (Common Rock-Rose). 



