Pseudostems 1--2 m. Leaves sessile; leaf sheath sparsely villous at margin; ligule ca. 4 mm, densely villous, apex cuneate; leaf blade linear-lanceolate, 18--25 × 3--5 cm, glabrous or abaxially sparsely villous especially along main veins, base obtuse or attenuate, apex narrowly long caudate. Racemes 4--8(--12) cm; rachis ca. 2 mm thick, slender, glabrous or pubescent; bracteoles absent. Flowers white slightly tinged with pink; pedicel 1--1.5 cm, pubescent. Calyx tubular, 0.8--1.2 cm, glabrous or pubescent. Corolla tube subequaling calyx; lobes oblong, 5--6 × ca. 2 mm. Lateral staminodes triangular, ca. 1 mm. Labellum red striped, ovate, ca. 7 × 5 mm, margin irregularly notched. Filament ca. 4 mm; anther ca. 2.5 mm. Ovary globose, ca. 1 mm in diam., densely villous. Capsule globose, 6--8 mm in diam. Seeds 4--5 mm in diam., many angled. Fl. Aug, fr. Oct--Dec.
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