barrenwort 'Purple Pixie'

'Purple Pixie' is a clump-forming, rhizomatous perennial 20-30cm high, with deciduous, pinnate leaves, 30cm long, formed of usually nine ovate to heart-shaped, spiny-edged leaflets which emerge purple-bronze and mature to green, and dark purple buds which open to flowers of dark pink-purple sepals and pale purple petals with white-tipped spurs in late spring and early summer; Epimedium leaves may be used for their nests by leaf-cutting bees