Silverweed, Potentilla anserina.
A perennial plant in the Rosaceae family. It is widespread in the Northern Hemisphere. It produces carbohydrate-rich, nutritious storage roots.
Worldwide, cultures, including those in the British Isles and North America, ate silverweed roots. As a carb, they surpass even potatoes.
The plant has important medicinal properties. Its phytochemicals have anti-inflammatory, antioxidant, and antimicrobial effects.