Pseudostems 0.8--1.2 m × 6--12 mm. Leaf sheath green, white puberulent; ligule bright red at margin, 2-lobed, or entire (when apex truncate), ca. 6 mm, white puberulent; petiole 3--10 mm; leaf blade abaxially densely black spotted, elliptic or narrowly lanceolate, 15--40 × 3--9 cm, abaxially glabrous except puberulent along midvein, lateral veins prominent adaxially, base cuneate, apex acuminate or caudate-acuminate. Inflorescences arising from rhizomes. Flowers unknown. Infructescence capitate, 3.5--5 × 5--6 cm; peduncle white, apex purplish red, 2--6 cm, glabrous; bracts green, purplish red at apex, lanceolate, ca. 2.5 cm × 6 mm, glabrous. Capsule yellowish green, ovoid, 3.5--4 × 2--2.2 cm, 3-angled, apex with persistent calyx. Seeds purplish black, subovoid, ca. 7 × 5 mm. Fr. Nov.
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