CHOICE PLANTS FOR ROCK GARDENS 179 
tion, are particularly suited for wall gardening or for 
colonizing among stretches of rubble-strewn ground. 
Example: S. Sibthorpii. 
Dactyloides—Forming cushion-like mounds of small 
finely-divided foliage in close rosettes. Flowers in small 
loose spikes, colours pink, red, crimson, or white ; succeed 
best in shady positions. Example: S. cespitosa. 
Diptera.—Entire leaves supported on rather long 
stalks. Flowers, with petals of varied sizes, white, gener- 
ally spotted with red or pink. Prefer peaty soil, and a 
cosy, sheltered position. Example: S. fortunei. 
Euaizoonia.—Rosettes of stiff, brittle foliage, edged and 
encrusted with a white limy 
excrescence. Flowers in upright 
panicles, most frequently white, 
some spotted, and a few rosy or 
purplish in colour. Delight in 
well-drained positions among 
limestone, and in the sun. 
Examples: S. aizoon and its 
many varieties, S. cotyledon, S. 
longifolia, etc. 
Hirculus——Rosettes of narrow 
leaves, flower stalks leafy, blos- PE eee fee 
soms yellow, dotted with red. 
Thrive under boggy conditions but not in stagnant pud- 
dles. Example: S. hirculus. 
Isoneria.—Foliage palmate, flowers white, in panicles. 
A small section of shade-lovers. Example: S. aconitifolia. 
Kabschia.—Cushions of small, spiny, undivided foliage, 

