28 Alpine Plants. 
the flat facing full south, or on a sunny bank of 
the rockery, in equal parts of deep strong loam and 
limestone. It is most essential to keep this plant 
firmly pressed back in its place, as it is very apt to 
become bare of soil around the collar. As it is so 
sure to work out of the ground, top-dress immediately 
after flowering; or if top-dressing is impracticable, 
it is possible to replant the plant instead, as it 
flowers so early that this can be done before the 
hot weather begins. If these precautions are not 
taken the plant will shrivel up with the sun, as 
the roots will be entirely exposed. After flowering, 
again top-dress. 
Callirhoe involucrata (N. America). 
This plant cannot be over-estimated as a late 
summer flowerer. Plant in a hot, dry, sunny position 
on a sloping bank facing full south, where a stone 
behind will protect from the north in winter, in 
a well-drained, deep soil composed of equal parts 
of sand and loam. 
Campanula Allioni (Piedmontese Alps). 
This plant requires a south-west aspect, in a 
well-drained place, in three parts sand to one part 
of loam. The large proportion of sand is necessary, 
as the roots run freely under ground and require 
something light and easy to penetrate ; moreover, 
the sand keeps the plant dry in winter and helps 
to maintain moisture in summer. Gradually, as the 
plant gains strength, it will begin to occupy other 
soil near by. Directly this escape from the original 
place is perccived, care should be taken to add 
