herbaceous perennial plant growing from tuberous roots, with stems 40–150 cm tall.
Linear leaves, 50–90 cm long and 1–2.8 cm broad. The flowers are 5–12 cm across,
orange-red, with a pale central line; they are produced from early summer to late
autumn on spikes of 10–20, with the individual flowers opening successively, each
one only lasting one day.
fertile, moist but well-drained soil preferably in full sun,