Small bladder senna

A long, hot day of brownfield survey making up for the two days that were curtailed by rain showers. Every year I record this shrub, but I have rarely seen it flower, as our May visit is usually too early, and by July the flowers are normally over, replaced by the very decorative inflated red pods. Both this taxon (Colutea x media) and its relative, bladder senna (Colutea arborescens), were originally  grown in gardens, but are now also naturalised in waste and grassy places, on roadsides and on railway banks (which is where this one grows) mostly in urban areas. I love the coppery flowers and have decided to take some seed in September and see if I can grow one for the garden!