Clump forming perennial with arching, dark green leaves, to 1m long, deeply cut to the midribs, with spiny margins.  Tall spikes of hooded, smoky-purple bracted, white flowers are produced in  long racemes to 1m, in mid-summer..  Prefers deep, fertile, well-drained soil in part shade. Fully Hardy.

Height 150cm Spread 75cm.

2 litre pot