Plants to 2 m tall, completely glaucous. Rhizome long-creeping, 0.5–1.5 cm diameter. Leaves: sheaths sometimes lanuginose; lamina bluish green, narrowly ovate to narrowly elliptic, 28–70 by 1.5–14(–17) cm, base and apex very gradually narrowed, acute. Inflorescence generally unbranched, with 1- or 2-flowered cincinni; pedicels 0–0.5 cm long, to 1.5 cm in fruit; primary bracts 10–30 cm long, acute; branch bracts 5–20 cm long, acute; floral bracts (broadly) ovate‑triangular, 0.7–2.5 cm long, acute to obtuse, persistent; bracteoles (broadly) ovate‑triangular, 0.3–2 cm long, acute to obtuse. Flowers (pale) yellow, erect, 7–10 cm long; sepals pale yellow, narrowly elliptic‑triangular, 1–2.5 by 0.3–0.7 cm, acute; corolla yellow, 5–9 cm long, petals erect, narrowly ovate to subulate, 4–7 by 0.7–1.3 cm, acute to acuminate; staminodes 4, yellow, 7–10 cm long, free part narrowly obovate to linear, 5–9 by 0.7–2.3 cm, erect, 1 strongly recurved; stamen yellow, free part narrowly obovate, 3.5–4.5 by 0.3–0.5 cm, theca 0.5–2 cm long; style yellow, free part linear to narrowly obovate, 4–5.5 by 0.1–0.3 cm. Fruit green, covered by glaucous green tubercles, obovoid to ellipsoid, (1–)2–5(–6) by 2–4 cm. Seeds broadly ellipsoid to globose, 6–9 by 4–6 mm.