Sea buckthorn (Hippophae rhamnoides). This vitamin-packed plant took its Greek scientific name 'horse bright' from the days of Alexander the Great, when it was noticed that wounded horses would seek out is leaves and heal themselves. He made the plant part of his army's diet, and marched across India.
Today it's being cultivated again in the Evros prefecture in eastern Thrace, and made into a tea and a juice.
Image by tuttotisane