It is a perennial plant growing to 0.3–1 metre (1 ft 0 in–3 ft 3 in) tall, with clustered orange or yellow flowers from early summer to early autumn. The leaves are spirally arranged, lanceolate, 5–12 cm (2" to 5") long, and 2–3 cm (about 1") broad. Some wild plants have been reported to have orange flowers that are very reddish. It is uncertain if this is due to soil mineral content, ecotype genetic differentiation, or both. A cultivar, "Hello Yellow", typically has more yellowish flowers than ordinary examples of this plant.