Diplacus Glutinosus (Hard-wooded Mimulus).—This elegant greenhouse shrub is an evergreen which delights in a rich, sandy loam. It flowers in June, and is increased by cuttings. Height, 3 ft.
Diplopappus.—Dwarf-growing evergreen shrubs of pretty habit. The golden stems and leaves of D. Chrysophylla render that variety specially attractive. A sandy loam is most suitable for their growth. They require the warmest situation the garden affords, and to be protected during the winter. Cuttings strike readily. They flower in August. Height, 2 ft.
Disbudding—The object of Disbudding is to prevent the growth of branches which, from their position, would be useless to the tree, and would consequently have to be cut away later on. The process is both simple and expeditious. The trees are gone over once a week during the spring, and the useless buds are rubbed off with the thumb, taking off first those which are most unfavourably situated. The work should be done gradually, so as not to give any check to the tree.
The term is also applied to the pinching out of flower-buds, such as those of the Chrysanthemum, so as to give more room and strength to the remaining blooms.
Disemma.—Splendid evergreen climbers, suitable either for the greenhouse or in a sheltered position out of doors. Plant in rich, loamy soil mixed with peat, and, if grown in the open, give protection to the roots during the winter. They flower in July, and may be increased by cuttings planted in sand under glass. Height, 20 ft. to 30 ft.
Dittany.—See "Cunila."
Docks, to Kill.—Cut the weeds down to the ground, and run a skewer dipped in vitriol through the roots.
Dodecatheon.—A hardy perennial, which is very ornamental when in flower. It grows best in a loamy soil, and is easily increased by dividing the roots. Blooms in May. Height, 1 ft.
Dog's-Tooth Violets.—See "Violets."
Dolichos Lablab.—Half-hardy annuals. The seed should be sown in spring in pots placed in heat, and kept in the hothouse till May, when the plants may be set out in a sheltered position, placing sticks for them to run up, in the like manner to Beans. Flower in July. Height, 6 ft.