A tall, elegant plant with handsome grey-green, waxy, oval leaves forming a dense clump. Stiff, upright stems, which sometimes break into short branches towards the top, bear a large, yellow slim-petalled flower with a very tall upright green cone-like centre that turns brown as the stamens appear.
A hardy perennial, this dies back in autumn and grows again in spring. Originating from damp woodlands of North America this is probably best grown in a soil that does not dry out. Hardy to -10 degrees or more.