Dischidia

Two species. Stove evergreen trailers. Cuttings. Sandy loam.

Disemma

Two species. Stove evergreen climbers. Cuttings. Loam and peat.

Disperis

Three species. Greenhouse orchids. Division. Peat, loam, and sand.

Disporum

Two species. Half-hardy herbaceous. Division and seed. Peat and loam.

Dissolena

Dissolena verticillata. Greenhouse evergreen shrub. Cuttings. Rich light soil.

Dittany

Origanum dictamnus.

Diuris

Eight species. Greenhouse orchids. Division. Peat, loam, and sand.

Dodecatheon

Two species, and several varieties. Hardy herbaceous. Division. Light loam. See American Cowslip.

Dog-Wood

Cornus.

Dolichos

Sixteen species. The two green-house twiners, D. jacquinii and lignosus, are the only two worth cultivating. Cuttings. Rich sandy loam.

Doliocarpus

Doliocarpus calinea. Stove evergreen climber. Cuttings. Turfy loam and peat.

Dombeya

Six species. Stove evergreen trees. Cuttings. Sandy loam and peat.

Dondia

Dondia epipactris. Hardy herbaceous. Seed or division. Loam and peat.

Doodia

Four species. Greenhouse ferns. Division and seed. Loam and peat.

Doronicum

Nine species. Hardy herbaceous. Division. Common soil.

Dortmanna

Two species. Hardy herbaceous. Division. Peat.

Dorycnium

Eight species. Hardy annual, herbaceous and evergreen. Seed. Sandy loam.

Doucin Stock

See Stock.

Douglasia

Douglasia nivalis. Hardy herbaceous. Seed. Peat and sand.

Draba

Forty-one species. Hardy herbaceous chiefly, and a few annuals. Seed. Loam and peat.

Draccena

Twenty-two species. Stove evergreen trees and shrubs. Cuttings. Sandy loam.

Dracocephalum

Twenty species. Chiefly hardy herbaceous. Division or seed. Common soil.

Dracophyllum

Three species. Green-house evergreen shrubs. Cuttings. Sandy peat.

Dragon's-Head

Dracocephalum.

Dragon Tree

Draccena draco.

Drepanocarpus

Drepanocarpus lunatus. Stove evergreen shrub. Cuttings. Rich loam.

Drilling

No crop in the garden should be sown broadcast, for drilling saves seed and labour; and although in some cases it takes more time to insert the seed in drills, yet this is more than compensated by the time saved during the after-culture, for the thinning and hoeing are greatly facilitated.

The distance apart appropriate for the drills for particular crops, will be found under their respective titles; they are usually made with a hoe and line; but for mustard, cress, and other small seeds, the drill-rake is often used. The teeth are set six inches apart, and are broad and coulter formed. When the drills are required to be less than six inches apart, the implement can be worked diagonally.

Drimia

Thirteen species. Greenhouse bulbs. Offsets. Sandy loam and peat.

Drosera

Nine species. Hardy and green-house aquatics. Seeds. Peat and water.

Drummondia

Drummondia mitelloides. Hardy herbaceous. Division. Peat.

Dryandra

Nineteen species. Green-house evergreen shrubs. Cuttings. Turfy sandy loam and peat.

Dryas

Four species. Hardy evergreen trees. Seed and cuttings. Peat and loam.