Birdsfoot (or Bird’s-Foot) Trefoil Family: Fabaceae (Bean, Pea, Legume Family) Genus: Lotus | Species: corniculatus L. Description: Birdsfoot trefoil is a moderately long-lived and very widely-distributed herbaceous perennial legume, with its most active growth period occurring in the spring and summer. It has a well developed, branching, tap-like root with side roots located near the