Rock Gardens. 



255 



it is not necessary to have the concrete foundation shown in Fig. 385, although 

 the latter is the best form for the small moraine, affording the most complete control 

 over the water supply. In wet weather the inlet pipe is shut and the outlet opened ; 

 in dry weather the converse. Where a slope is a\'-ailable, Fig. 386 shows a 

 simple but efficient type of moraine. A half-inch pipe perforated at every six inches 

 is led along the top six inches below the surface. Flat rocks are useful, as in the bog 



garden, 



for access to the plants. Fij; 



387 



shows the construction of a morame 



which has been found to work well in practice. 



-PEEfOEATED PIPE 



5MALL CRANiVB 

 CHIPS § SPRINKUWG 

 OF LEAF MOULD 

 A LirriE. OLD 



^---2<JL ^-^^^ -~ /^ A SMALL QUAN- 

 TITY OF SAND, . 

 THE WHOLE LAyER 

 9 INCHES TO 

 BOUqH' STONES SUCH ONt fOOTTHlCK 



SECTIONAL AS PEBBLES OR. qEANrTE 



VIEW. 



FIG. q86. — CONSTRUCTION OF MORAINE ON SLOPE. 



PEJJFOBATEO 

 PIPE 



QRANITE CHIPS ETC 

 AS IN Fig. 386. 



',";'• O ■.'-'. -,-**^^, 



\_BAP 



■<^^^ 





'c^ 



.^ .X 



■^o">">,o 



/ i^'oOZ .-. - - - 



FIG. 3S7. — CONSTRUCTION OF MORAINE ON LEVEL GROUND. 



In this moraine (Fig. 387) the following, among other Alpines, flourish and bear 

 flowers in profusion : x\ndrosace brigantiaca, carnea, lanuginosa, primuloides, villosa ; 

 Asperula suberosa ; Antirrhinum asarinum ; Arenaria purpurascens ; Campanula 

 collina, puUa, puUoides, Ste\'eni nana, waldsteiniana ; Cyananthus lobatus ; 

 Dianthus Freynii, microlepis, neglectus ; Edraianthus Pumilio, pumiliorum ; 



