Cassia Popcorn Plant

Popcorn cassia is a semi-deciduous, multi-branching shrub or small tree that can grow up to 25 feet tall, but generally remains much shorter (6-10 feet tall). ... This plant blooms from spring through fall (but most freely in late summer when temperatures are warm), with dense flower spikes up to one foot tall. With leaves that smell like buttered popcorn when rubbed.