The Popcorn Cassia is an aromatic, flowering shrub in the legume family. It has bright yellow flowers in tall, upright clusters. The flower clusters are held above the leaves on long, green stems. The rubbed leaves have the scent of freshly buttered popcorn. It usually grows up to about 15 feet in height. It is also known as the candelabra tree. Native to Africa. Hardy in zones 9-12.