- CHOICE PLANTS FOR ROCK GARDENS 137 
six dozen different species, varieties and hybrids avail- 
able for the rock garden or alpine bed, it is not my 
intention to make a catalogue-like list of all, but would 
recommend that for a selection, the reader might well 
start with the Cheddar Pink, D. czsius, in its single and 
double forms; D. neglectus, a close-growing species with 
bright rosy carmine blossoms; C. alpinus, a free-growing 
and free-flowering plant with spotted flowers ; D. superbus, 
which bears richly fragrant, fimbriated flowers, of rich 
pink, on rather long stalks; and D. deltoides, ‘‘ Brilliant,” 
a prostrate plant with tiny foliage, and innumerable 
cherry-carmine blossoms. With these well established, 
further additions may be made as desired, the Mule Pinks, 
hybrids, with more or less double flowers on stiff stems, 
being very attractive. Napoleon III is one of the finest 
crimson flowers we may have in the rock garden, and 
there are others of similar character, with flowers of 
varied colours. The one point to watch with these, is 
that they are apt to flower with such profusion that they 
make practically no basal growths, and consequently 
die from sheer exhaustion. To maintain stock, there- 
fore, it is well each season to pinch back a plant or two, 
to prevent blooming. They will then make sturdy basal 
growths, which, in due time, may be stripped off to make 
cuttings. 
We have two yellow-flowered Dianthus, D. knappii, 
and D. pubescens, and there are a number of whites, 
and a few of rich crimson. D. atkinsoni is one of the 
best of the latter colour. 
DODECATHEON.—There is something decidedly un- 
