A short-lived perennial, it is a member of the Legume family - Fabaceae that spreads mainly by seed. It is widely grown in agriculture as a fodder crop and as it is able to fix it's own nitrogen in nodules on the roots, it improves the fertility of the soil. It is not usually a problem weed in the garden and would be fine in a wildflower meadow, provided the grasses were not too aggressive.
The leaves are compound, with 3 leaflets and are arranged alternately along the stems. The leaflets have a paler crescent similar to that on White Clover leaves, but they are more elongated with a blunt point.
The dark pink flowers appear from May to September in a dense, ball-shaped cluster. They are borne at the ends of the branching stems.
It is not an aggressive vegetative spreader like the White Clover and can be uprooted relatively easily, but the main growing point must be removed. There are no underground spreading rhizomes and the fine roots do not regrow.
Follow these links for further details on Weeds, Weed Removal and Weed Prevention.