Gourds.--Sow at the end of March or the beginning of April on a slight hotbed; pot off when the plants are sufficiently advanced, and transplant to the open border in June. They are well adapted for arbours, trellis-work, or sloping banks. The following are among the most ornamental:--Abobra Viridiflora, Benincasa Cerifera (Wax Gourd), Bryonopsis Erythrocarpa, Coccinea Indica (scarlet fruit), Cucumis Anguinus (Serpent Gourd), Cucumis Dipsaceus (Teasel Gourd), Cucumis Dudaim (Balloon Gourd), Cucumis Erinaceus (Hedgehog Gourd), Cucumis Grossularoides (Gooseberry Gourd), Cucumis Perennis, Cucurbita Argyrosperma, Cucurbita Melopepo, Cyclanthera Explodens (Bombshell Gourd), Cyclanthera Pedata, Eopepon Aurantiacum, Eopepon Vitifolius, Lagenaria Clavata (Club Gourd), Lagenaria Enormis, Lagenaria Leucantha Depressa, Lagenaria Leucantha Longissima, Lagenaria Plate de Corse, 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:--