84 



Bulbous-rooted and Rock Plants. 



BBMPBBTIVnjM ABACHNOIDES. 



Sempervivium. — Similar to the above. S. Cali- 

 fornicum, S. arachnoideum, and S. montanum are the 

 most suitable. No rockery is complete without Eche- 

 verias and Seniperviviums. 



Glechoma, or ground ivy. — A pretty trailing rock 



