196 BRECK’S NEW BOOK OF FLOWERS. 
The flowering period of these plants may be prolonged _ 
beyond the winter by retaining the terminal, or upper 
growth, but to ensure a fine early autumn or winter 
bloom, the upper growth should be shortened or pruned 
back (where requisite), in the spring or early summer 
months, and the plants placed in a cool, airy green-house, 
or cool east or south pit throughout the summer, to ma- 
ture the requisite vigor of growth for bloom. During the 
warm summer months, the plants should not be placed in 
any position where a free ventilation of air cannot be af- 
forded by day and night; and when the requisite growth 
is obtained, they may be exposed in the open air until au- 
tumn, with the usual daily attention given to plants in 
pots. 
D. horténsis.—Garden Pink.—This species is in perfec- 
tion about the last of June. The foliage is more grass- 
like, and the plant much hardier, than the Carnation. 
The double varieties are very desirable, not only for their 
beauty, but also for their fragrance. They may be prop- 
agated by dividing the roots, by layers, and by pipings. 
The surest mode of propagation is by layers, but piping 
is generally resorted to for Pinks. These are shoots cut 
from the plant at the second or third joint, according as 
they are more or less woody or juicy, and inserted, close 
to each other, in a bed of well pulverized proper compost; 
water moderately, so that the earth may adhere closely 
about the shoots; when the moisture has somewhat 
evaporated from the leaves, cover them up with a hand 
glass, which must be forced a little depth into the ground 
so as to confine the air. This need hardly be removed 
until the plants have taken root; they must be shaded, 
however, the first fourteen days, with mats over the glas- 
ses, when the sun is very hot. If properly managed, not 
one in twenty will miss, and between one and two hun- 
dred may be planted under one glass; in a month or six 
