Cassia didymobotrya. Spectacular large focal point. This unique African legume has buttery yellow blooms all summer. This is a cool plant to share with friends, as during the day, if you rub a leaf and sniff it, you will smell movie theater buttered popcorn! Great in border backs, naturalized and butterfly gardens. Grows 4-6' tall by 3-4' wide. Blooms late spring to late summer. Full sun. Plant in moist, well-drained soil. Zones 9-11.