CULTURE OF THE GENUS HELIANTHEMUM. 
177 
ARTICLE XIII. 
CULTURE OF THE GENUS CISTUS. 
The C. ladaniferus and Ledon produce the gum ladanum, but 
not in such quantities as C. Creticus. The resin which is secreted 
from the leaves and other parts of the shrub is scraped off by means 
of a kind of rake, called in Candia, Ergatiri, to which numerous 
leathern thongs are appended instead of teeth. This instrument 
being drawn backwards and forwards over the plant from time to time 
collects the resin. Dioscorides says they gather the Ladanum by 
means of goats, which browsing on the leaves of the shrub, return 
to the stable with their beards loaded with a fat substance, which 
the peasants rake off with a kind of comb made on purpose. 
The species of the genus Cistus or Rock-rose deserve to be culti¬ 
vated in every garden for the beauty of their flowers and leaves. 
The greater part of those called frame shrubs, will survive a severe 
winter, if planted against a south wall so as to be covered with mats 
in severe frosts; but, notwithstanding we would recommend a plant 
of each of these tenderer sorts to be kept in the greenhouse during 
winter, and to be planted out in the spring. They may be either 
increased by seeds or layers, or by ripened cuttings, taking off in 
July or August, which if planted thinly under a hand-glass will root 
readily.— Don's Millers Dictionary 
ARTICLE XIV. 
CULTURE OF THE GENUS HELIANTHEMUM. 
The hardy shrubby kinds of this genus are amongst the most beautiful 
little shrubs for ornamenting rock-work. The frame and greenhouse 
kinds should be planted in pots in a mixture of sand, loam, and peat, 
so that they may be protected during winter bv a frame : the smaller 
kinds of these may be planted out on rock-work during the summer 
months. Ripened cuttings will strike root freely, if planted under a 
common hand-glass in a sheltered situation, in August or September, 
or they may be raised by seeds, which ripen in abundance. The 
perennial and biennial herbaceous kinds should be grown in pots, so 
that they may be protected by a frame during winter in a mixture of 
sand, loam, and peat; they are easily increased by seeds. The annual 
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