GHENT AZALEAS, as generally known, from having been raised in Belgium, are a race of hybrids that have been produced by crossing the Asiatic R. pontica with the various American species noted above, but particularly R. calendulaceum, R. nudiflorum, and R. viscosum, and these latter with one another. These have produced hybrids of almost indescribable beauty, the flowers of which range in colour from crimson and pink, through orange and yellow, to almost white. Within the last few years quite an interesting race of Rhododendrons has been brought out, with double or hose-in-hose flowers, and very appropriately termed the Narcissiflora group. They include fully a dozen highly ornamental kinds, with flowers of varying shades of colour. The following list includes some of the best and most beautiful of these varieties:-- Alba marginata. Ardens. Astreans. Aurore-de-Royghen. Baron G. Pyke. Beauté Celeste. Bessie Holdaway. Belle Merveille. Bijou des Amateurs. Cardinal. Charles Bowman. Comte de Flanders. Decus hortorum. Due de Provence. Emperor Napoleon III. Eugenie. Fitz Quihou. Glorie de Belgique. Gloria Mundi. Gueldres Rose. Honneur de Flandre. Imperator. Jules Caesar. La Superbe. Louis Hellebuyck. Madame Baumann. Marie Verschaffelt. Mathilde. Meteor. Nancy Waterer. Ne Plus Ultra. Optima. Pallas. Queen Victoria. Reine des Belges. Remarquable. Roi des Belges. Roi des Feux. Sinensis rosea. Sulphurea. Triumphans. Unique. Viscocephala. Double-flowered Rhododendrons:-- Bijou de Gendbrugge. Graf Von Meran. Heroine. Narcissiflora. Louis Aimée Van Houtte. Mina Van Houtte. Ophirié. Van Houttei. RHODOTHAMNUS. RHODOTHAMNUS CHAMAECISTUS (_syn Rhododendron Chamaecistus_).--Ground Cistus. Alps of Austria and Bavaria, 1786. A very handsome shrub, of small growth, and widely distributed in Bavaria, Switzerland, and elsewhere. Planted in peaty soil and in a rather damp, shady situation it thrives best, the oval-serrate leaves, covered with white, villous hairs, and pretty rosy flowers, giving it an almost unique appearance. It is a charming rock shrub and perfectly hardy. RHODOTYPOS. RHODOTYPOS KERRIOIDES.--White Kerria. Japan, 1866. A handsome deciduous shrub, and one that is readily propagated, and comparatively cheap. It is distinct and pretty when in flower, and one of the hardiest and most accommodating of shrubs. The leaves are handsome, being deeply serrated and silky on the under sides, while the pure white flowers are often about 2 inches across. It grows about 4 feet in height, and is a very distinct and desirable shrub. RHUS.