Dolichos. Hyacinth Bean

[A name under which Dioscorides describes a plant supposed to have been the kidney bean of the moderns.]

Dolichos Lablab. - Purple Hyacinth Bean. - A fine tender annual climber, with flowers in clustered spikes; purple, with a white variety. It grows from ten to twenty feet in a season; treatment very much like that of the common bean. A native of Egypt.

Downingia

[Dedicated by Doct. Torrey, to the late A. J. Downing.]

Downingia Elegans. Elegant Downingia

A beautiful tender annual, with delicate foliage, and rich blue flowers in great profusion; six inches high; in July and August.

D. Pulchella. Pretty Downingia

It is a pretty flowering tender annual, of very humble growth, only rising a few inches high. The flowers are rather larger than D. elegans, blue, with a broad white spot at the centre, stained with a rich yellow. The flower is about half an inch across. Its delicacy of growth will prevent its spreading rapidly through the country.

When grown in pots in the green-house, both are very beautiful.

The Downingias are natives of California and are generally called Clintonia, by florists; a name given by Douglas, who did not know that it had already been applied to another genus.

Dracocephalum. Dragon's Head

[From Greek words, signifying a dragon's head, because the flowers are fancied to resemble one.]

Dracocephalum Speciosnm. Showy Dragon's Head

Is a native of Siberia; perennial; three feet high, with pink flowers; in July and August.

D. Sibiricum. Siberian Dragon's Head

From Siberia, perennial; one foot high, with light blue flowers; in July and August. Some of the annual species are handsome border-flowers.

D. Moldavica. Moldavian Balm

An annual from Moldavia with blue, and a variety with white flowers; in July and August; two feet high.

D. Canariense. Balm Of Gilead

This plant smells of citron, especially when rubbed between the fingers. Sown on a hot-bed early in spring, it may be planted out in the borders like other tender animals. Flowers pale-blue or purple; from July to September; three feet high; From the Canaries.

Eccremocarpus

[From the Greek words meaning suspended fruit.]

Eccremocarpus scaber. - Rough Eccremocarpus. - This, which is sometimes called Calampelis, is a beautiful climber, a tender perennial, which flowers the first year. The flowers are produced in panicles or racemes, are of a bright orange color; it flowers profusely the latter part of the summer, but it is necessary to start the plants very early in a hot-bed, and when the plants have five or six leaves, they should be transplanted into pots, and turned into the ground in June. The seeds are difficult to vegetate. Properly speaking, it is a green-house plant.

Echinacea. Cone-Flower

[Name from the Greek for Hedgeboy, in allusion the spiny chaff of the disk.]

Echinacea purpurea - Purple Cone-flower. - A native of Ohio and other western States, and formerly called Rudbeckia purpurea. It grows from three to four feet high, and has a rough stem and leaves. The disk of the flower is very rich, appearing in the sun of a golden crimson; the rays are purple, in some varieties whitish, and one to two inches long. A hardy perennial, easily propagated by division of the root.

Epilobium. Willow-Herb

[From Greek words, signifying a flower growing upon a pod.]

Epilobium angustifolium. - Valuable in shrubberies, as thriving under the drip of trees, and succeeds every where, even in the smoke of cities, and in parks. It is a good plant to adorn pieces of water, being hardy, and of rapid increase, and very showy when in flower. It produces dense spikes of purplish-red flowers; three or four feet high, in July and August. It is handsome when growing in the field or garden, but the flowers are not suitable for bouquets, as they immediately wither upon gathering. At a short distance, the flowers resemble those of Purple Phlox in color, and persons not acquainted with botany, take it for a plant of that family; but it belongs to an entirely different one. It is easily propagated from cuttings of its long straggling roots.

Erysimum. Treacle-Mustard

[From a Greek word, signifying to draw blisters.]

Erysimum Peroffskianum. Palestine Mustard

This is a hardy annual, having some resemblance to the Wallflower. The plant is erect; one to two feet high; bearing racemes or spikes of deep-orange blossoms; from June to September; a mass of it is quite showy.

E. Arkansanum. Western Wall-Flower

A native of Arkansas, very similar to the other species; two feet high; with yellow flowers most of the season.

Erythronium. Dog's-Tooth Violet

[From a Greek word signifying red, in allusion to the color of the European species.]

Erythronium Dens-Canis

Dog's-tooth Violet is the common name in England, where it is a favorite. It is not at all related to the Violet, but belongs to the Lily Family. It is a bulbous rooted vernal plant, with purple flowers; one-half foot high; there is also a variety with white flowers.

E. Americanum. Yellow Adder's-Tongue

This is a beautiful vernal plant with bulbous roots, situated deep in the ground. The whole plant is smooth and glossy. Flowers yellow, solitary, drooping; leaves two, nearly equal, lanceolate, veinless, of a dark brownish-green, clouded with irregular spots. Flowers in May; three to four inches high. This pretty indigenous plant should be transferred to the garden; it may be taken in July, after flowering. It will require a leaf-mould soil for its successful cultivation.