Trifolium wormskioldii Lehm.

A herb. It has long underground stems or rhizomes. There are fine roots at the nodes on these stems. There are few stems and these can be upright or lie along the ground. The leaves have 3 leaflets. These vary is shape and size. The central leaflet is 2.4 cm long. There are fine teeth along the edge. The flower heads are almost round. There are 50 flowers in a group. The flowers are purple often with white tips. The fruit is a pod with 1-5 seeds.

From beaches to mountain meadows, growing in wet and periodically inundated places, such as high salt and brackish marshes, coastal dunes, wet meadows, and stream banks, generally in open, moist or marshy places; at elevations up to 3,200 metres.

The rhizomes are harvested after the leaves have been killed by frost and then roasted in ashes or boiled.

Plants can be grown from seed.