Birdsfoot Trefoil is identified as a low-growing, mat-forming weed. This broadleaf weed has stems that can become woody with age and are square at the top and round at the base, with or without hairs. It also has well-developed rhizomes, stolons and a coarse secondary root system. The plant resembles clover but has two leaf-like stipules at the base of the petioles. Birdsfoot Trefoil flowers in late spring and blooms throughout the summer, producing small, yellow flowers forming a legume shape. Reproduction of this broadleaf weed occurs by seeds, stolons and rhizomes.
This broadleaf weed is often found in lawns and along roadsides and waste areas. It is found throughout much of the continental United States.
Proper cultural practices, such as proper mowing and watering, can help prevent Lotus corniculatus by creating dense grass, which inhibits this broadleaf weed’s ability to grow. Physical removal (i.e., pulling weeds) can be effective, though you run the risk of spreading the seeds to additional areas of your lawn and landscape.