SELECTION OF PLANTS* 345 



through the winter in a frame or in the greenhouse, or if 

 will be liable to be killed in severe weather. 



In winter it dies down to the root, and comes up again 

 the following spring. This is the case with all the North 

 American species, by which means they are frequently lost, 

 as some cultivators, not being aware of it, suppose they 

 are dead, and turn them out of the pots. 



It is increased by cuttings planted under hand-glasses, 

 which should be potted off thin as soon as they are 

 rooted. It may also be increased by seed, which ripens 

 in abundance. 



64. UELIANTHEMUM MILLERI, Mr. Miller s Sun Rose. 



This plant is very desirable for ornamenting rock wolk, 

 its fiowers being so different in colours from most others, 

 thriving well in a light sandy soil. It also makes a hand- 

 some appearance in pots, in a mixture of sandy loam and 

 peat, and will continue in bloom in succession all the 

 summer. 



It is quite hardy, though, if the weather is severe, the 

 plants in pots may have a slight covering. It is propa- 

 gated by cuttings planted under a hand-glass. 



65. HELIANTHEMUM MUTABILE, (3. ROSEUM, Rose- 

 coloured changeable Sun Rose. 



The present species is a native of Spain, and will endure 

 our winters in the open ground, except when very severe. 

 It flourishes well on a dry bank, and produces its flowers 

 all the summer. The flowers are variable in colour ; at 

 first bright rose, then changing to a dull lilac or flesh colour, 



Q 2 



