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
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.