Plants 1--1.5 m tall. Leaves sessile; ligule ca. 5 mm, membranous, glabrous, apex emarginate; leaf blade elliptic or oblong-lanceolate, 35--40 × 7.5--9.5 cm, glabrous, base cuneate or narrowly so, apex acuminate. Spikes subcapitate, ca. 5 × 3.5 cm; peduncle 3--12 cm; bracts brown or greenish brown, ovate or narrowly so, 2--3 × 1.2--1.5 cm; bracteoles reddish, tubular, ca. 3.5 cm. Calyx ca. 3 cm, apex 3-toothed, teeth reddish at apex. Corolla tube white, ca. 3.2 cm; central lobe suboblong, ca. 3 × 1.3 cm, apex mucronate; lateral lobes subelliptic, ca. 1.1 cm. Lateral staminodes red, subulate, ca. 4 mm. Labellum red at center, with radiate lines and yellow apex, suboblong, ca. 3.5 × 1.8 cm, margin crisped, apex entire. Stamen white; filament ca. 5 mm; anther linear, ca. 1.5 cm; connective appendage entire, ca. 4 × 8 mm. Ovary yellowish green, ca. 6 mm, glabrous. Fl. May.
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