Medicago luputina - Family, Pulse. This is a yellow-flowered clover, with flowers in short spikes; and kidney-form, 1-seeded pods. Leaves, with petioles, 3-divided, the leaflets nearly round, often tipped with a small thorn. Pods, when ripe, curl and become black. March to December.

In dry fields and waste places, a weed, throughout the country. Brought originally from Europe.