38 Making a Rock Garden 



place, while the double white rock cress 

 (Arabis albida) will pass. 



The easy rock garden plants, where the 

 material is not taken from the wild, are 

 to be found in most of the large hardy 

 gardens of the East. Some of them are 

 natives of Europe or Asia, and more than 

 is commonly suspected are at home in 

 other parts of the United States. Among 

 the best of these for carpets of bloom are 

 Phlox subulata, Phlox amcena, Aubrietia 

 deltoidea, maiden pink (Dianthus del- 

 toides), blue bugle (Ajuga Genevensls), 

 white bugle {Ajuga reptans}, woolly 

 chickweed (Cerastium tomentosum), 

 creeping thyme (Thymus serpyllum}, 

 dwarf speedwell (Veronica repens), Sa- 

 ponaria ocymoides, alpine mint (Cala- 

 mintha alpina), and pink, white, and yel- 

 low stonecrops (sedum). All of them 

 fairly hug the ground. There are other 



