Digitalis

Twenty-six species. Hardy herbaceous. Seed. Common soil.

Dilatris

Three species. Greenhouse herbaceous. Division or seed. Sandy peat.

Dillenia

Dillenia speciosa. Stove evergreen tree. Cuttings. Sandy loam.

Dillwynia

Fifteen species. Green-house evergreen shrubs. Cuttings. Sandy loam and peat.

Dinema

Dinema polybulbon. Stove epi-phyte. Offsets. Peat and postsherds.

Dinetus

Dinetus paniculata and racemosa. The first a stove perennial; the second a hardy annual twiner. The first by cuttings; the second by seed. Rich sandy soil.

Diodia

Four species. Stove evergreen trailers, except D. virginica, which is hardy and deciduous. Cuttings. Light soil.

Diomedea

Three species. Greenhouse evergreen shrubs. Cuttings. Rich light loam.

Dioscorea

Yam. Five species. Stove tubers. Division. Light rich soil.

Diosma

Twenty-three species. Green-house evergreen shrubs. Cuttings. Peat and sand.

Diospyros

Twenty-three species. Chiefly stove evergreen trees, but a few are hardy. Cuttings. Light loam.

Diphylleia

Diphylleia cymosa. Hardy herbaceous. Division. Light rich soil.

Diphaca

Diphaca cochinchinensis. Greenhouse evergreen shrub. Cuttings. Peat and loam.

Diphysa

Diphysa carthaginensis. Stove evergreen shrub. Cuttings. Sandy lo;un and peat.

Diplacus

Two species. Greenhouse evergreen shrubs. Cuttings. Rich sandy loam.

Diplazium

Nine species. Stove ferns. Division or seed. Loam and peat.

Diplocoma

Diplocoma villosa. Hardy herbaceous. Seed and division. Common soil.

Diplolaena

Diplolaena dampieri. Greenhouse evergreen shrub. Cuttings. Loam and peat.

Diplopappus

Diplopappus incanus. Half-hardy evergreen shrub. Cuttings. Sandy loam.

Diplopeltis

Diplopeltis hugelii. Green-house herbaceous. Young cuttings. Common soil.

Diplophyllum

Diplophyllum veronica forme. Hardy annual trailer. Seed. Common soil.

Diplothemium

Two species. Stove palms. Seed. Rich light loam.

Dipodium

Dipodium punctatum. Stove orchid. Division. Sandy loam and peat.

Dipsacus

Six species. Hardy biennials. Seed. Common soil.

Dipterix

Dipterix odorata. Stove evergreen tree. Cuttings. Rich loam.

Dirca

Dirca palustris. Hardy deciduous shrub. Layers or seeds. Sandy loam.

I)1SA. Twelve species. Green-house orchids. Division. Peat, loam, and sand.

Disandra

Disandra prostrata. Green-house evergreen trailer. Division or cuttings. Rich light soil.

Disbudding

Disbudding is the removal, soon after they have burst into leaves, of such buds as, if allowed to grow into shoots, would be misplaced. Thus, buds protruded directly in the front of, branches trained against walls, or fore-right shoots, as they are correctly termed, and buds that would produce shoots in places already sufficiently filled with branches, may be removed, or disbudded. The object is to strengthen the desirably-placed buds by thus confining the expenditure of sap upon them. There is no better mode of aiding a weakly plant to a more vigorous and robust growth than judicious disbudding; but an over-robust and super- luxuriant tree had better be allowed to exhaust itself by a profuse development of leaf buds.