Lagenaria Poire a Poudre, Lagenaria Siphon, Luffa Cylindrica, Luffa
Solly Qua, Melothria Scabra, Momordica Balsamina, Momordica
Charantia,
Momordica Elaterium, Mukia Scabrella, Scotanthus Tubiflorus,
Trichosanthes Anguina, Trichosanthes Coccinea, Trichosanthes
Colubrina, and Trichosanthes Palmata.
Grafting.--The objects of Grafting are to bring a bush or tree into an
earlier state of bearing than it would do naturally; to produce good
fruit from an inferior plant; and to save space by putting dwarf
scions on to rampant-growing trees. By the process of uniting
strong-growing trees to those of a weaker nature their exuberance is
checked, and weaker ones are improved by being worked on those of
a stronger growth. Whatever form of Grafting is adopted, the inner
layers of the bark of the stock or tree on which the operation is
performed, must be brought into direct contact with the inner layers
of the bark of the branch which is grafted, or, as it is called,
the scion. This scion should be a branch of the early growth of the
previous year's wood, and should be in the same state of vegetation as
the stock. If the scion is in a more advanced state than the stock,
its growth may be stopped by cutting it off and burying it in the
earth under a north wall until the stock has advanced sufficiently in
growth. Grafting of all kinds is best done in March, when the sap is
flowing freely. Many methods of Grafting are adopted, the following
being the principal:--
Whip or Tongue Grafting is suitable for almost any description of
trees. Saw the stock off level at any desired height, then make a deep
upward slanting cut through the bark at the top 2 or 3 in. in length,
and in the middle of the cut turn the knife downwards and cut out a
thin wedge-shaped socket. Next cut the scion in a similar manner so
that it will fit exactly into the incision of the stock, bringing the
bark of each into direct contact. Bind it firmly in position, and
cover it over, from the top of the stock to the bottom of the scion,
with grafting wax or clay. When the scion and the stock are united,
which is demonstrated by the former making growth, remove the wax and
cut away all shoots that may be produced on the stock.
In the French mode of Grafting known as the Bertemboise, the crown of
the stock is cut at a long level, about 1 in. at the top being left
square, and an angular piece is cut away in which the scion is
inserted. It is then bound and waxed over.
Theophrastes or Rind Grafting is used where a tree has strong roots
but inferior fruit. The branches are cut off about 1-1/2 or 2 ft. from
the main stem. A sharp cut 2 or 3 in. in length is made down the bark
of the branches, and the lower parts of the scion, selected from a
superior tree, having been cut into tongues resembling the mouth-piece
of a flageolet, the bark of the branches is lifted with a knife, and
the tongues of the scions are slipped in, bound, and waxed.
Side Grafting is useful where it is desired to replenish the tree
with a fresh branch. A T-shaped cut is made in the stem of the tree,