Culms 8–16 m, 4–10 cm in diam., straight; internodes initially green, becoming yellow-green or yellow, ca. 35 cm, white powdery above and below nodes, densely puberulent; wall ca. 4 mm thick; nodal ridge less prominent than sheath scar, absent at unbranched nodes. Culm sheaths brown-purple, with small sparse dark brown spots and few stripes, strigose; auricles inconspicuous; oral setae purple, long; ligule red-purple, truncate to arcuate, with dense cilia 1–2 mm; blade reflexed, green-purple, with yellow margins, narrowly lanceolate to linear, crinkled. Leaves 1–4 per ultimate branch; oral setae well developed; ligule strongly exserted, long ciliate; blade 10–15 × 0.8–1.5 cm, both surfaces sparsely puberulent. Flowering branchlets spicate, to 10 cm; scaly bracts 4–6, gradually larger; spathes 4–7, glabrous, usually with 1 or 2 oral setae; blade ovate-lanceolate to subulate. Pseudospikelets 2 or 3 per spathe. Spikelets with 2 or 3 florets. Glumes 1, sparsely puberulent; rachilla internodes pubescent; lemma 2–2.5 cm, setulose; palea shorter than lemma, centrally and distally setulose; lodicules oblong-rhomboid, ca. 4 mm, puberulent. Anthers 7–8 mm. Stigmas 2. New shoots Apr, fl. Apr–May.
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