Bigpod sesbania

Sesbania herbacea, the bigpod sesbania or coffeeweed, is an erect, fast-growing annual or short-lived perennial herb of the Fabaceae native to the warm-temperate to subtropical Americas, from the southern United States through Mexico and Central America into northern South America. Plants reach 1–4 m in a single season, with soft, hollow, glabrous green stems and alternate, paripinnate leaves 10–25 cm long. Leaflets are 20–60 per leaf, oblong to oblong-elliptic, 1.5–3 cm long, glabrous, with mucronate tip and entire margins. Stipules are small and caducous. Inflorescences are axillary racemes of 2–6 papilionaceous flowers 1–1.5 cm long, the standard yellow with brownish-purple streaks on the outer surface, wings yellow, keel pale. The pod is a slender, almost terete, pendulous legume 15–25 cm long and 3–4 mm wide, slightly curved, with 30–50 small olive-brown, kidney-shaped seeds separated by transverse partitions. Flowering and fruiting occur from summer through autumn in moist disturbed soils.