SELECTION OF PLANTS. 333 



by cuttings and seeds, and managed in all respects like the 

 rest of the species. 



21. CISTUS CLUSII, Clusiuss Rock Rose. 



This plant forms a handsome compact bush, and is 

 tolerably hardy, thriving best in a dry sandy soil, and 

 propagated and managed the same as the rest of the tribe. 



22. CISTUS PSILOSEPALUS, Smooth- sepaled Rock Rose. 



This plant succeeds well in common garden soil in 

 rather a dry situation, and would thrive well in rock work, 

 or if grown in pots, in a mixture of sandy loam and peat, 

 it would do well. 



It is propagated by cuttings planted under a hand-glass 

 in autumn, and protected in winter. 



23. CISTUS VILLOSUS, Villous Rock Rose. 



This plant forms a snug compact bush, and continues 

 to produce its flowers in succession for a length of time. 

 It will require protection during the severity of the winter, 

 as most of this species do ; they should be preserved from 

 too much moisture. 



This handsome genus is generally managed and pro- 

 pagated in the same way. 



The South of Europe is its native place. 



24. HELIANTHEMUM SULPHUREUM, Sulphur-coloured 

 Sun Rose. 



This pretty little plant is well adapted for the orna- 

 menting rock work. It will stand our mildest winters 

 well, but in very severe frosts it requires protection. 



It will thrive well in pots in a light sandy soil, where it 



