This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
Deciduous or evergreen shrubs or small trees with hermaphrodite clustered or solitary axillary flowers. Perianth campanulate or salver-shaped. Stamens 4 or 5. Fruit a spurious drupe formed of the fleshy perianth-tube and the 1-seeded nut. A small genus scattered over the northern hemisphere. The classical name of the Wild Olive, hence the English name Oleaster.
1. E. angustifolia, syn. E. hortensis. - A very handsome and distinct small hardy tree with a few scattered spines, lanceolate oblong or ovate acute quite entire leaves covered on both sides as well as the branches with silvery glistening scales and fragrant flowers yellow within, scaly without, solitary or 3 or 4 together, produced in great profusion in Summer, and followed by red berries. A native of the South of Europe and Western Asia.
2. E. argentea. Silver Berry. - A spreading shrub 8 to 12 feet high, young branches ferruginous. Leaves varying from lanceolate to broadly elliptical, clothed with silvery scales on both sides. Flowers axillary, clustered. Berries silvery, ribbed. A native of North America.
E. umbellata, syn. E. Japonica, and E. reflexa. - The beautiful Japanese variegated varieties in cultivation appear to belong to this species, but in the absence of flowers and fruits it is impossible to identify them with the described species. E. pungens is a spiny shrub of which there are variegated forms; and E. longipes, syn. E. crispa, E. multiflora, etc., is another variable Japanese species.
Hippophae rhamnoides, Sea Buckthorn, is a deciduous shrub with narrow glabrous silvery foliage and dioecious flowers. Male flowers in axillary clusters, perianth bipartite. Stamens 4. Female flowers solitary; perianth slightly 2-lobed. Fruit membranous, included in the fleshy orange-yellow perianth-tube. A native of the eastern coast of England and various parts of Europe and Asia.