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Bird's-foot trefoil produces whorls of 3-8 flowers on the end of long stalks that arise from leaf axils. Individual flowers are bright yellow (sometimes tinted with orange), about 1/2-3/4" long and across, in the standard pea-like pattern — a single vertical petal (the standard), a pair of lateral petals (the wings) and two petals perpendicular to the standard fused for about half their length (the keel). The calyx has long, light-green teeth. There are 10 stamens (of two lengths, alternating) and a single curved style, hairy at the tip. The fruit is an 1" long, purplish-brown, pea-like pod containing about two dozen seeds with the calyx at one end and a long "beak" (the remnant of the pistil) at the other.

Lotus

Lotus corniculatus

bird's-foot trefoil [Blooms: Jun-Sep]