Astragalus danicus, known as purple milk-vetch, is a species of flowering plant in the family Fabaceae (legumes). It grows to about 30 cm (12 in) tall with compound leaves having 13–27 leaflets. Its flowers are usually in shades of blue and purple, rarely white, and are 15–18 mm (0.6–0.7 in) long. They are followed by fruit pods 7–9 mm (0.3–0.4 in) long. Astragalus danicus is native to Europe, from Ireland and subarctic Russia south to the Alps and central Ukraine.