Rheum

Rhubarb. Fifteen species. Hardy fusiform-rooted perennials. Division or seed. Rich loamy soil. See Rhubarb.

Rhexia

Four species. Hardy herbaceous perennials. Division. Peat soil.

Rhinopetalum

Rhinopetalum karelini. Hardy tuberous-rooted perennial. Offsets. Light rich soil.

Rhipodendron

Rhipodendron plicatile, and its variety. Green-house evergreen shrubs. Suckers or leaves slightly planted. Sandy loam and peat.

Rhus

Seventy-seven species. Chiefly green-house evergreen shrubs some hardy deciduous trees, shrubs, and climbers, or creepers. The stove and green-house kinds increase by ripe cuttings, the hardy species by cuttings and layers. Common soil suits them all.

Ribes

Forty-four species and many varieties. Hardy deciduous shrubs. Cuttings. Common soil. See Currant and Gooseberry.

Richardia

Richardia athiopica. Greenhouse herbaceous perennial. Offsets. Light rich soil.

Richiea

Richiea fragrans. Stove evergreen climber. Cuttings. Loam, peat, and sand.

Ricinus

Eight species. Half-hardy annuals and green-house evergreen shrubs. Seeds and cuttings. Rich soil. R. communis produces the Castor Oil.

Ricotia

Ricotia lunaria. Hardy annual. Seeds. Light sandy soil.

Rigidella

Rigidella flammea. Stove tuberous-rooted perennial. Offsets or seeds. Light rich soil.

Ringing

Ringing is a practice adopted for the purpose of checking the return of the sap, and thereby confining a larger supply to the blossom. It is removing an entire zone of bark, about an inch wide, around the branch to be rendered more fruitful, and taking care that the bark be completely removed down to the very wood. This was designated the ring of Pomona, but it certainly was not auspiciously received by that deity; for although it renders the part of the branch superior to the wound more fruitful for two or three seasons, yet it renders the branch unsightly by the swelling which occurs around the upper lip of the wound, and is always followed by disease and unfruitful ness. See Ligature.

Ripogonum

Two species. Green-house evergreen climbers. - Young cuttings. Loam and peat.

Rivea

Rivea liaefolia. Stove evergreen twiner. Cuttings. Rich .oam ana peat.

Rivina

Seven species. Stove evergreen shrubs. Seeds or cuttings. Light soil.

Robinia

Seven species and many varieties. All hardy deciduous trees, except R. guineensis and R. purpurea, which are stove evergreens. Increased by young cuttings. Loam, sand, and peat. The hardy kinds are increased by layers or grafts, and require only common soil.

Rocambole

Allium Scorodo-prasum. Sometimes called Spanish Garlic, has its bulbs or cloves growing in a cluster. The stem bears many bulbs at its summit, which as well as those of the root are often preferred in cooking to garlic, being of much milder flavour.

Time Of Insertion

It is best propagated by the root bulbs, those of the stem being slower in production. The plantation may be made either in February, March, or early part of April, as well as throughout the autumn, in drills or by the dibble, in rows six inches apart each way, and usually two inches within the ground; though the plants would thrive better if grown on the surface as recommended for the shalot. In other respects they are cultivated as directed for Garlic. A very small bed is sufficient for the supply of the largest family.