14 ALPINE PLANTS. 
mixed well together in a well-drained part 
facing full south, if possible, just in front of 
a stone, so that in the wet winter season the 
stone may be used as a protection for the 
plants from rain and snow (especially sar- 
mentosa), for if the snow is allowed to be on 
the foliage too long it will rot out the crowns, 
on account of the woolly nature of the 
foliage. A top-dressing of compost should be 
used in the early autumn, so as to enable 
the young runners to root freely; if in an 
exposed position the young rosettes should be 
pegged down, to prevent the wind from 
blowing them about. <A. /anuginosa slightly 
differs from the above, as it does not root 
from the young shoots, and is better adapted 
for hanging over stones. If planted just 
behind a stone the young growths will hang 
down the front part of the rock and bloom 
freely. This plant may be pruned _ back 
annually, as it sends out young growths from 
the base every year. The old shoots should be 
cut away, say, every second year ; in fact, they 
become very straggly if left more than two 
years, and do not flower so freely. This also 
should be planted so that the rain can be 
