Looking like a small yellow-flowered clover, black medick is a low-growing plant of dry areas and grassland with shoots which can reach 80cm but are usually around 25 to 40cm long. The leaves in typical clover or shamrock style, are in threes, and with a tiny point at the tip. There are a few dozen small flowers in each globose flower-head. Being another from the pea and bean family it fixes nitrogen from the air to make proteins and therefore will fertilize barren ground and has been used as nutritious fodder for animals. Not to be confused with its close relations the hop trefoil and lesser trefoil.