spurless barrenwort

E. ecalcaratum is a clump-forming, rhizomatous perennial 30-65cm high, with evergreen pinnate leaves of three, five or seven ovate or almost rounded, spiny-edged leaflets, each 1.5-4cm long, which emerge green and light bronze and mature to bright green, and long, dark red stems, held well above the leaves, carrying spurless, bell-shaped, bright yellow flowers, each up to 1cm across and with tiny dark bronze-red sepals, from mid-spring to late spring; Epimedium leaves may be used for their nests by leaf-cutting bees