Pseudostems 80--100 cm, base with purple sheaths. Ligule entire, 4--5 cm, white pubescent; petiole 5--10 mm; leaf blade lanceolate or narrowly lanceolate-elliptic, 40--50 × ca. 10 cm, adaxially glabrous, abaxially white pubescent, base narrowed, apex acuminate. Inflorescences arising from rhizomes, oblong, 4--4.5 × 2--2.4 cm; peduncle 2--6 cm; bracts narrowly lanceolate, 4--4.5 cm × 8--9 mm, white pubescent, apex acuminate; bracteoles 3.8--4.2 cm. Calyx 2--2.3 cm, membranous, puberulent, apex 3-toothed. Corolla tube yellowish at apex, 3.8--4.2 cm, densely pubescent; lobes yellowish, central one linear-lanceolate, 2.8--3.2 cm × ca. 3 mm, lateral ones ca. 2 mm wide. Labellum yellowish, ligulelike, ca. 3 × 1 cm, apex entire; lateral lobes absent. Anther sessile, white, ca. 1.7 cm; connective appendage orange, ca. 8 mm. Ovary densely brown pubescent. Fl. Aug.
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