52 ALPINE PLANTS. 
thus keep off the rains during winter. 
fl. cerulea alba also does well under the 
above treatment. These two combine nicely, 
and should be grown on every rockery. A 
little top-dressing is required in the spring 
and a gritty soil. 
HYPERICUM CORIS, H. REPTANS, and 
H. REPENS. These require dry, sunny places 
between stones, or just behind a _ stone, so 
that the foliage can grow down the face. 
Rough loam, sand, and grit. A. xummularium 
requires rather more sand, and will do on 
a bank, clear of stones, where it can run 
into the soil. A sunny place suits it well. 
H.. olympicum requires a more sheltered place, 
in good loam, and is better adapted for the 
border part of the rockery. A. tomentosum 
is not quite so hardy, and should be planted 
where a little protection can be given in 
winter, as its woolly foliage holds the moisture. 
There are several smaller species which do 
equally well in ordinary gritty loam; give a 
full south aspect. 
IBERIS STYLOSA. This miniature plant 
requires limestone and does well between 
