Hardy Ornamental Flowering Trees and Shrubs · Chapter 183Rhamnus
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RHAMNUS ALATERNUS.—Mediterranean region, 1629. This is an evergreen shrub, with lanceolate shining leaves of a dark glossy-green colour, and pretty flowers produced from March till June. There are several well-marked varieties, one with golden and another with silvery leaves, and named respectively, R. Alaternus foliis aureis, and R. Alaternus foliis argenteus.
R. ALPINUS.—Europe, 1752. This is a neat-growing species, with greenish flowers and black fruit.
R. CATHARTICUS, Common Buckthorn, is a native, thorny species, with ovate and stalked leaves, and small, thickly clustered greenish flowers, succeeded by black berries about the size of peas.
R. FRANGULA.—The Berry-bearing Alder. Europe and Britain. A more erect shrub than the former, and destitute of spines. The leaves too are larger, and the fruit of a dark purple colour when ripe. More common in Britain than the former.