4 o THE BOOK OF THE WILD GARDEN 



as P. cortusoideSy P. denticulata, P. latifolia, P. marginata, 

 P. sikkimensis and P. villosa. P. rosea and P.japonica are 

 lovers of moisture and partial shade. 



Sanguinaria. — A charming spring-flowering Canadian 

 plant, bearing numbers of white flowers an inch in 

 diameter. It succeeds in loamy soil beneath deciduous 

 trees, and has a very pretty effect if naturalised on a 

 sloping bank at the side of a running stream. 



Saponaria. — Of these the best is S. ocymoides, a pretty 

 trailing plant covered with rosy flowers in the early 

 summer. It thrives in gritty soil among half-buried 

 stones, and covers the face of the rock with its flower- 

 laden growths. There is a white variety of this plant. 



Saxifraga. — The incrusted Saxifrages, such as the 

 noble S. pyramidalis and S. longifolia, with their spires of 

 blossom, and other allied species are never more at home 

 than when growing in a narrow rock-crevice, through 

 which their roots may descend into moist and congenial 

 compost. Little gems, such as S. Boydii, S. Boydii alba, 

 S. Burseriana and others do best if grown in a similar 

 site. The Mossy Saxifrages, of which S. muscoides is 

 the type, form carpets of bright green studded in the 

 spring with white flowers, and spread soft mats over the 

 inequalities of the rocks. As they enlarge their dimen- 

 sions rapidly they are invaluable for stony spots. All of 

 the species should be provided with good drainage and a 

 gritty root-run. 



Sedum. — These vary in size from the lowly S. glaucum 

 to S. spectabile two feet in height. The dwarf varieties 

 are equally useful with the lesser Saxifrages for 

 covering stony ground or rock ledges, and are of the 

 easiest culture. 



Sempervinum. — House leek. Some of these can be 

 easily induced to grow on the perpendicular surfaces of 

 rocks by fixing some clay on the inequalities to give 

 their roots a start, and when large clusters are formed 



