I have a plant flowering at the moment, and the label says Sesbania punicea, but I'm wondering if it's Colutea. It's fairly leggy, but that could be from lack of attention, and it has small bright orange-red peaflowers in small clusters. What makes me think it might be a Colutea is the inflated seed pods. But the leaves are bluey green, and those of Colutea seem to be brighter green.
Can someone tell me if Sesbania punicea has inflated seed pods?