Rose of Sharon.—See "Hibiscus Syriacus."
Rubus.—See "Blackberries."
Rudbeckia (Cone Flower.)—Hardy annuals yielding yellow flowers in July. They are readily grown from seed sown early in spring, and will grow in any garden soil, but naturally succeed best in deeply-worked, well-manured ground. They may be increased by division in October or November, as well as in spring-time. Height, 3 ft.
Ruscus Aculeatus (Butchers Broom).—A hardy evergreen shrub which thrives in any rich soil, and may be increased by division of the root. Height, 1 ft.
Ruta Graveolens.—This hardy evergreen shrub is a species of Rue. It enjoys a good, rich soil, in which it flowers freely in August. Cuttings may be struck under a hand-glass. Height, 3 ft.
Ruta Patavina (Rue of Padua).—For rock-work this hardy perennial is very useful. It likes a dry yet rich and light soil. At midsummer it produces an abundance of greenish-yellow flowers. It can be raised from seed, or cuttings may be struck under a hand-glass. Height, 6 in.
S
Saffron, Spring.—See "Bulbocodium."
Sage.—This useful herb likes a rich, light soil, and is propagated by division of the root, by cuttings, or by seed.
Saintpaulia Ionantha.—The leaves of this plant spread themselves laterally just over the soil, forming a rosette, in the centre of which spring up large violet-like flowers. It is a continuous bloomer. A rather light, rich soil or vegetable mould suits it best. The seed, which is very minute, should be sown early in spring, in gentle heat: to prevent it being washed away, the pots may stand up to the rims in water for a while when the ground wants moisture. Height, 1 ft.