254 



Gardens for Small Country Houses. 



of rich compost behind 

 the rock face. Fig. 384 

 shows the charming effect 

 of roughly - hewn rocky 

 steps leading down through 

 such a wall from the 

 terrace to the rock garden. 

 Such steps should not be 

 allowed to become over- 

 grown with herbage, 

 though small fry, like 

 E r i n u s alpinus, lonopsi- 

 dium acaule and Linaria 

 alpina, may be suffered 

 to grow in the interstices. 

 In the small bog garden 

 one must carefully avoid 

 such vigorous growers as 

 Gunnera, Rodgersia, 

 Saxifraga peltata and all 

 those plants which appear 

 in catalogues under the 



heading " Bo^ 



side Plants. 



and Water- 

 The bog 



should be 



Primulas 



b u r n i a n a , 



frondosa, 



pulverulenta, 



denticulata, 



devoted to 



rosea, cock- 



farinosa, 



i ap onic a , 



c api t at a, 



Sieboldii ; to 



FIG. 



384. — ROCK STEPS LE.VDING FROM TERR.iCE THROUGH ROCK 

 W.\LL TO ROCK G.^RDEN. 



IMLET PIPE 



shortias, terrestrial orchids, 

 the choicer trolliuses, 

 dodecatheons and 

 mertensias. 

 The soil must be spongy and constantly moist, but at the same time well drained, 



for nothing worth growing wiU endure stagnant moisture. A few large, flat slabs 



of stone on the surface will be of great value in affording access to all parts of the 



bog without injury to the 



plants. Fig. 383 shows 



cypripediums thoroughly 



at home upon the upper 



margin of a bog garden. 



A moraine garden is 



troublesome to construct, 



but repays the trouble. 



The essentials are very 



sharp drainage and abund- 

 ance of moisture in dry 



weather. Unless the supply 



of water is very limited, 



FIG. ^,S 



5.— CONSTRUCTION OF SMALL MORAINE. 



