ALPINE PLANTS. 35 
out the tips; if this is done the plant will 
greatly benefit by it, and soon become a fine 
clump. WD. callizonus (Transylvania) differs 
from the above in growth and habits. This 
species requires a light, sandy soil and a full 
south aspect on the flat part of the rockery. 
It forms suckers and runs in the ground. 
It requires careful top-dressing in the spring. 
D. Freynit. This is probably the smallest 
Dianthus we have, but a very interesting 
variety on account of its small, bright flowers 
and neat, compact habit; this thrives best 
on a dry, sandy bank, and, like the others, 
needs top-dressing once or twice a_ year. 
Hine sandy loam and good drainage are 
most essential. Spring is the best time for 
dividing or replanting. WD. glacialis (Alps 
of Europe) is perhaps the rarest and, I may 
say, the most difficult to grow. No doubt 
a really good clump of this would be hard 
to find. I find it grows best in a_ south- 
west aspect on a sloping bank, with a com- 
post of loam, leaf-mould, and sand; just 
enough sand should be added to keep the 
soil open. The plant should be dressed once 
or twice a year, or as often as the soil 
D 2 
