98 PRESENT-DAY GARDENING 
D. cesius (Cheddar Pink).—A typical English species, 
which grows only 3 or 4 inches in height. The flowers 
are variously rose-coloured. It may be established in gar- 
dens, either as a plant on walls, or in the rock garden. It 
does admirably on our chalky soil; in soils that do not 
contain lime, some mortar rubble should be added. Its 
bluish-grey foliage is very pretty, even when the plant is 
not in flower. 
D. Caryophyllus (Clove Pink).—This is the parent type 
of the garden Carnations and Picotees ; but as a garden 
plant the type species is very rare, unless the numerous 
single-flowered forms of the Carnation produced from every 
packet of seed of the double-flowered varieties may be 
taken to represent the type. The species used to grow on 
the walls of Rochester Castle, but it is supposed to be a 
naturalised plant in Britain, and not indigenous. The 
flowers are rose and pink coloured of various tints. 
D. caucaseus (Caucasean Pink).—The first cultivated 
plants of this species were raised from seed which Messrs. 
Loddiges procured from Mount Caucasus. It is figured in 
the Bot, Mag., Tab. 795, and later, at Tab. 5215, D. seguieri 
is figured as a variety of D. caucaseus, which it probably is. 
D. ruthenicus, D. collinus, and D. montanus are all varieties, 
or synonyms, of D. caucaseus. 
D. petreus (Rock Pink).—A pretty species with white 
flowers, borne on erect but slender stems. This species 
does not differ very materially from D. plumarius, except 
that the petals are not so finely divided. 
D. plumarius (Garden Pink).—This is the original type 
of the numerous varieties of the Garden Pink. The wild 
form is a very poor thing, and not- worth cultivation. 
