Family - Fabaceae
Stems - Erect, glabrous, glaucous.
Leaves - 8-30 cm long, short petiolate, pinnately compound, with 30-70 narrowly oblong leaflets, glabrous, with entire margins.
Inflorescence - Loose axillary clusters with 2-7 flowers.
Flowers - Calyx tubes 3-4 mm long, with short triangular lobes, bell shaped, glabrous. Corollas papilionaceous, glabrous, yellow. Stamens 10, with 9 filaments fused nearly to the tip.
Fruits - Legumes, 10-20 cm long, 3-4 mm wide, quadrangular in cross section, with 20-40 seeds.
Flowering - July - November.
Habitat - Disturbed sites, waste ground, roadsides, railroads, ditches.
Origin - Native to North America.
Other information - In Missouri, this weedy yet attractive species has been
found mainly in the bootheel region, along with a few other counties along the Missouri River and the Arkansas border.
The plant can be identified by its glabrous, tall stems, large leaves, big yellow flowers, and long, drooping fruits.
The leaves grow perpendicular to the stem giving the plant a distinctive appearance. Plants can grow to 3m tall or more.
Photographs taken off Hwy 29, Macon County, AL., 10-9-04 (DETenaglia); also at Otter Slough Conservation Area, Stoddard County, MO, 8-19-2013 (SRTurner).