io 4 n tbe proper "dse of Iberbaceous plants. 



hardly be naturalized. But they well deserve to be grown 

 even at the expense of considerable labor, for the sake of 

 their delicate beauty. Many rock plants, on the other hand, 

 may be naturalized in crevices of rocks filled with deep 

 layers of leaf mould or in rocky woods as previously shown 

 in this chapter. Among the most desirable for natural- 

 izing are: In sunny positions: Stone crops, saxifrages, 



FIQ.56. DWARF MULLEIN (R4MONDIA PY3-INAI3A) A TYPI'AL ROCK PLANT. 



houseleek, rock cress, Erysimum, whitlaw grass, Alyssurn 

 saxatile, creeping phlox, purple rock cress, Erinus, cham- 

 pion, candytuft, Linaria alpina, several columbines, and 

 Opuntia. In half shady positions : Silene, several species, 

 Dianthus, aster, Hieracium, yellow chamomile, bellflowers, 

 Epimeditim, Heuchera, many anemones, potentillas, ranuncu- 

 lus, several species of Primula, Tunica, Ramondia, and 

 numerous ferns. 



