A clump-forming, evergreen perennial with upright to arching, broadly linear, keeled, mid- to dark green leaves and, from late spring into summer, erect stems bearing dense, terminal, spike-like racemes of bright green buds opening to tubular, yellow-green flowers turning yellow-orange with age.
Height 75cm (2.5ft), Spread 60cm (2ft), 2-5 years to maturity.