The Rock Garden 109 



ROCK CRESS, WHITE (Arabis albidd). White, fragrant. May; 4 to 6 

 inches. Cheapest and showiest spring-blooming white-flowered 

 plant for carpeting the ground. Do not confuse with alpina, 



having smaller flowers and otherwise inferior. , PURPLE 



(Auorietia deltoidea). Purple. June, July; 3 inches. Moist or 

 dry places. Best in rich soil in pockets to keep roots cool. 

 Unusual colour. Needs slight protection. 



SAXIFRAGE, PYRAMIDAL (Saxifraga Cotyledon). Great silvery rosettes 

 of leaves and pyramidal inflorescence 20 inches high, of small 

 white flowers. May, July. Largest and showiest of the 

 family. To get the largest specimens remove the offsets. Excel- 

 lent for rockeries. , THICK-LEAVED (S. crassifolia). Pink. 



April; 6 to 8 inches. Sun. Massive coarse foliage and flowers 

 in dense, branching heads; 3 to 4 inches long. (See also LONDON 

 PRIDE, p. 61.) 



SEA LAVENDER (Statice lati folia). Lavender. June; 18 inches. Sun. 

 Any soil. Very effective. Small flowers in profuse spreading 

 spikes. For background. Do not disturb. Deep soil. 



SEA PINK (Armeria maritimd). Pink. May, June; 3 to 6 inches. Sun. 

 Flowers in dense heads above tufts of evergreen foliage. Any soil. 

 Propagate by seed or division. 



SELF-HEAL (Brunella grandiftora). Dull purple. June to July; 8 to 12 

 inches. Half shade. Flower heads carried above the mass of 

 foliage. Avoid dry soil. Also for carpeting. 



SHOOTING STAR (Dodecatbeon Meadia). Pink. April; I foot. Shade. 

 Ouster of flowers surmounting long stalk. Open, well-drained soil, 

 moderately rich. Give northern or eastern aspect. 



SHOWY SEDUM (Sedum spectabile). Pink. August; 18 inches. Sun. 

 One of the best summer flowers for dry, shallow soil. (See p. 228.) 



SILVERTUFT (Alyssum argenteum). Yellow. April and all summer; 

 I foot. In clustered heads. Sunny places with deep soil. 



SNOW-IN-SUMMER (Cerastium tomentosuni). White. June; 8 inches. 



Smothered with flowers I inch across. Silvery foliage attractive 



all season. Fine for edgings and naturalising on rocks or in strong 



grass. Drought resister. 

 STORE'S ASTER (Stokesia cyaned). Blue. August. , (var. alba). 



White. Largest thistle-like flower for rockeries; 6 inches. Sun. 



