i88 ROCK GARDENING FOR AMATEURS 



are not connected by the threads. The red flowers are 

 produced in September. 



S. montanum is one of the commonest kinds on the 

 Alps, having bright mauve-purple flowers in June, on 

 stems clothed with red-brown tipped leaves. It is a 

 very variable plant with green rosettes. 



5. Pittoni is a neat and pretty kind from the Styrian 

 Alps, having pale yellow flowers in July, and rosettes of 

 green leaves tipped with purple-brown. 



S. Reginae-Amaliae forms a handsome plant, from 

 Greece, with large rosettes of purplish-brown leaves, and 

 pale yellow flowers in June. 



S. tectorum. The Common Houseleek, often found 

 wild on the roofs of houses, forms large tufts of green 

 rosettes, the leaves of which are often tipped with red- 

 brown. 



S. triste, of garden origin, is very distinct, with red 

 flowers in June, on stems thickly clothed with reddish- 

 brown leaves, and rosettes of the same colour, three 

 inches or more across. 



