Other common names
Black medick, yellow trefoil, black clover, hop clover, black hay, etc.
A low-growing spreading weed commonly found in lawns or pastures, black medic can be differentiated from other common lawn clovers by its yellow flowers. It grows well in dry soil low in nitrogen or compacted soil.
Compound, with three oval leaflets with visible teeth at the tips. The central tooth on each leaflet is a bit longer than the others. The center leaflet has a longer stalk. Leaves have soft hairs.
Grow flat to the ground, branch, and may be more than a foot long. Stems are softly hairy.
Yellow flowers are tiny and group together in clusters of as many as 50 individual flowers. Blooms from spring to mid-summer. Seedpods turn black at maturity.
Grows a thin taproot with many fine, spreading roots.
Eastern Europe and Asia
Where it grows
Lawns, pastures, gardens, roadsides, crops and forests
Annual (sprouts, flowers and dies in a single year); sometimes lives longer.
Reproduces by seed.
Control relies on preventing production of seed. Each plant can produce thousands of seeds, which live for several years.