Rhizomes creeping, ca. 1 cm in diam., subterete, slender. Pseudostems 30--60 cm. Ligule auriculate, 2-lobed; petiole very short; leaf blade oblong or oblong-lanceolate, 20--30 × 6--8 cm, sparsely pubescent on both surfaces, base obtuse, apex acuminate. Inflorescences arising from rhizomes, 4--5 cm, many flowered; peduncle 4--5 cm; bracts lanceolate, ca. 2 cm, base sheathlike. Calyx ca. 1 cm, split on 1 side, base hirsute, apex truncate. Corolla tube slender, 2--3 cm; lobes purple, ca. 2 cm, central one ca. 9 mm wide, wider than lateral ones, concave. Labellum obovate, ca. 2.2 × 2 cm; central lobe deep violet, obovate-oblong, 1.5--1.2 cm, apex emarginate; lateral lobes yellowish at base, violet at margin and apex, smaller than central lobe. Anther linear, subcylindric, ca. 1 cm; connective appendage linear, curved, ca. 1 cm. Ovary glabrous. Capsule enclosed by persistent bracts and bracteoles, loculicidally dehiscent; pericarp fleshy, red inside. Seeds black; aril cushionlike.
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A ginger herb. The rhizomes are creeping. They are 1 cm across. The false stems are 30-60 cm tall. The leaves are oblong and 20-30 cm long by 6-8 cm wide. The flowering shoots arise from the rhizome. They are 4-5 cm long with many flowers.
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