Sesbania pea (yellow pea bush)
Sesbania cannabina

Leaves, alternate, compound with up to 35 pairs of leaflets. Flowers pea-shaped, yellow, calyx 3-5.5 mm long, standard 6-10 mm tall, yellow with purple flecks on the back, wings yellow but not streaked with purple. Pod 12-20 c, long, 2-3 mm wide pale brown to yellowish brown.