| Bladder Senna |
| Colutea arborescens|
| Uses: Medicinal
|| Duration: Perennial (hardy in zones 6-9) |
| When to Sow: Spring/Late Summer/Early Fall
|| Ease of Germination: Easy |
Attractive hardy Mediterranean shrub. Yellow flowers bear bladder-like pods which when squeezed go off with a bang. Like true senna (Cassia spp.), its leaves have purgative properties, but the effect is much less drastic.