Rhizomes shortly creeping, thick. Leaves grayish green on both surfaces, linear, 25--55 cm × 5--8 mm, 3--5-veined, base surrounded by persistent fibers. Flowering stems 50--60 cm, hollow, 1-or 2-leaved; spathes 3, green, lanceolate, 6--9(--16) cm × 8--10 mm, 2-flowered, apex long acuminate. Flowers yellow, 6--10 cm in diam.; pedicel 3--11 cm. Perianth tube 0.5--1.2 cm; outer segments with purple-brown stripes and spots, obovate, 6--6.5 × ca. 1.5 cm, claw with conspicuous, dark purple auricles on both sides; inner segments slanting outward, oblanceolate, 4.5--5 cm × ca. 7 mm. Stamens ca. 3.5 cm. Ovary 1.2--1.8 cm. Style branches dark yellow, 4.5--6 cm. Capsule ellipsoid-cylindric, 3--4 × 1.5--2 cm, 6-ribbed, apex not beaked. Seeds brown, semiorbicular. Fl. May--Jun, fr. Jun--Aug. 2 n = 40*.
Can be grown by divisions. Seeds needs stratification.
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