Though not representative of the Serpentine Community, this spectacular flowering perennial does extemely well on this rocky site because of its preference for good drainage. Though difficult to establish initially, it can become invasive as it spreads rapidly by underground roots, forming a dense colonies. Beautiful white flowers with yellow centers, sometimes called the fried egg flower, appear in June and July.
Stems die back in autumn, and removal of old stems encourages heavier flowering the following year.