Erodium.—­An extensive genus of very beautiful plants, mostly hardy.  They will grow in any soil, and merely require ordinary treatment.  The bloom is produced in June or July.  Height, 4 in. to 1 ft.

Eryngium.—­A very ornamental and beautiful kind of Thistle.  They are mostly quite hardy, and will grow in any garden soil, though they thrive best in a light, sandy one.  The greenhouse and frame varieties should be grown in pots, so that they can be easily housed in winter.  They are readily increased by seed or division, and produce their flowers in July.  Height, 1 ft. to 4 ft.

Erysimum.—­Flowers of little merit.  The herbaceous kinds thrive in common soil, but do best in a mixture of loam and peat.  They may be increased by cuttings placed under glass.  The annuals and biennials merely need sowing in the open during autumn.  They bloom in June and July.  Height, 1-1/2 ft. to 2 ft.

Erythrina Crista Galli (Coral Plant).—­A showy, summer-blooming greenhouse plant.  Place it in turfy loam enriched with old manure.  It may be transferred to the garden in the summer, and when the wood is ripe cut it back and keep it dry till spring.  Cuttings taken at a joint, with the leaves left on, may be struck in sand.

Erythronium Dens-Canis (Dog’s Tooth Violets).—­See “Violets.”

Escallonia.—­Handsome, half-hardy, evergreen shrubs, possessing rich glaucous leaves and bunches of tubular flowers.  A peat and sandy loam soil suits them best.  They may be planted against, and trained to, a south wall, but need protection from frost.  The laterals may be cut back fairly close in March to encourage new growth.  They may be propagated by layering in the autumn, or by suckers taken in the spring.  Height, 3 ft.

Eschscholtzia.—­Pretty hardy annuals, especially during August, when they are in flower.  Any rich soil suits them.  Easily raised from seed sown on a gentle hotbed in spring, and afterwards transplanted to the border.  They flower longest if sown in autumn, but the young plants need protection through the winter.  Height, 1 ft.

Eucalyptus Citriodora.—­A useful window or greenhouse plant, with small, oblong, bright green leaves, furnished with appendages that emit an odour resembling the Lemon-scented Verbena.  It is of easy cultivation, growing freely from seed sown in slight heat.  Height, 4 ft.

Eucalyptus Globulus.—­A greenhouse everlasting tree, commonly known as Blue Gum.  It delights in a mixture of peat, loam, and sand.  Cuttings, which should not be too ripe, root in sand under glass.  It may be grown from seed sown, in a temperature of 65 degrees, from February to April.  It flowers in June.

Eucharidium.—­Pretty little hardy annuals, nearly allied to the Clarkia.  The seed may be sown in autumn for early flowering, or in spring for blooming in July.  Height, 1 ft.

Eucomis Punctata.—­A fine, autumn-blooming plant, bearing long spikes of fragrant creamy-white flowers and curiously-spotted stems.  It may be grown in any rich soil.  Height, 2 ft.