This is a tough perennial herb growing from a woody rhizome. The thick leaves are oval in shape and up to about 30 centimeters long including the petioles, located in a basal rosette about the stem. The inflorescence is a stiff, branching panicle often exceeding a meter tall bearing large clusters of flowers. The flowers have lavender sepals and smaller white petals.
It is also known from coastal southern California, where it is a non-native landscaping escapee which can occasionally be seen growing around beaches and roadsides.