Bur Clover
Bur Clover (Medicago hispida). Very low-growing annual cool-weather legume. Small yellow pea like flowers. Seeds contained in a soft-spined bur. Control by increasing soil health. It is similar in appearance to black medic.
Recommended control: This and many other tough undesirable plants are best controlled with physical removal and the use of vinegar and fatty acid products on regrowth.