The sea-buckthorns (Hippophae L.) are deciduous shrubs in the genus Hippophae, family Elaeagnaceae.
There are considered to be seven species, two of them probably of hybrid origin, native over a wide area of Europe and Asia.The common sea-buckthorn (Hippophae rhamnoides) is by far the most widespread of the species in the genus, with the ranges of its eight subspecies extending from the Atlantic coasts of Europe right across to northwestern China.
In western Europe, it is largely confined to sea coasts where salt spray off the sea prevents other larger plants from out-competing it, but in central Asia it is more widespread in dry semi-desert sites where other plants cannot survive the dry conditions.
In central Europe and Asia it also occurs as a subalpine shrub above tree line in mountains, and other sunny areas such as river banks. They are tolerant of salt in the air and soil, but demand full sunlight for good growth and do not tolerate shady conditions near larger trees. They typically grow in dry, sandy areas.