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SINGLE TREES. 378 SISYRINCHIUM. 
in the Gardener’s Magazine, vol. y 
xili., and in Mr. Loudon’s Suburban 
Gardener. ¥- 
In planting single trees, and in- 
deed trees of every kind, the great- 
est possible care should be taken to 
place them so high above the sur- 
face, as that after they have sunk 
down, as they will doin a few years, 
they may still appear to stand on a 
little hillock, or to grow out of a 
Fig. 53.—Fuil-grown Tree. . 
for retaining water; but they will 
soon sink down to the appearance 
shown in fig. 53. 
Sinni'Neta.— Gesneridcee.— Stove- 
plants with large bell-shaped flowers. 
They should be grown in light rich 
soil. 
Srenoca’mpyisu.— Lobelidcee.— e 
A suffruticose plant, with red and 
Fig 52.—Newly-planted Tree. green tube-shaped flowers. It is 
generally kept in the greenhouse, 
small mound. If we examine thriv-| but it is nearly hardy. It should 
ing trees in natural wood, we shall | be grown in heath-mould, and it is 
always find that the collar, that is,| propagateé by cuttings, which 
the point of junction between the | should be dred a little before they 
stem and the root, rises above the | are planted. 
general surface, so as to form a lit-| Siero\nta—-Euphorbidcee.—The 
tle hillock. On the cther hand, if | American Indian-rubber tree. The 
we examine trees in artificial plan-| first elastic gum brought to Europe 
tations, in which the soil has been | was the produce of the Ficus elds- 
deeply trenched, we shall generally | tica; and as this plant is a native 
find that though they may have|of the East Indies, the substance 
been planted at first level with the | was thence called Indian rubber. 
surface, they will, after a certain It has since been found that several 
number of years, have sunk consid-| trees produce it; and the Caout- 
erably below the surface ; or if care; choue used for the Mackintosh 
has been taken to keep the ground | cloaks, &c., is principally produced 
about them level, by adding fresh | by the Siphénia Cahtichu, a native 
soil as the surface sinks, they will | of Guiana. The species requires a 
appear with their collars completely | stove in England; and it grows 
buried, and their trunks rising out | freely in peat, loam, and sand. It 
of the soil like so many posts driven|is propagated by cuttings of the 
into it by art, stead of springing | young wood in sand, with a bell- 
from a woody base rising above the | glass and bottom-heat. 
soil like trees and shrubs in a natural Pet scosisin,-Craiciferm ieee 
forest, or on a common. In plant- | British weeds. 
ing single trees, therefore, hillocks Sisyri’Ncuium.— Iridee. — Mus- 
should at first be raised to a height | tard. Beautiful little plants resem- 
which will for a year or two appear bling bulbous plants in their flowers, 
quite unnatural, as shown in fig.| but with fibrous roots. They are 
52, in which may be observed a/all natives of America, and they 
small hollow at the base of the stem | should be grown in sandy peat. 
x 
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